Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

Symptom	Probable cause(s)	Notes
HDS does not communicate with the PCM	DLC circuit	Troubleshoot the DLC circuit; K24Z1 engine (see DLC CIRCUIT TROUBLESHOOTING ), K24Z6 engine (see DLC CIRCUIT TROUBLESHOOTING ).
When you turn the ignition switch to ON (II), the D indicator comes on and stays on in all shift lever positions, or it never comes on at all	F-CAN communication line error Gauge control module defective PCM defective	Check the F-CAN communication line for a DTC; K24Z1 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ), K24Z6 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ). Check the F-CAN communication line by using the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function (see THE INDICATOR DRIVE CIRCUIT CHECK ).
A/T gear position indicator does not come on while the shift lever is in that position; shift indicator does not work	F-CAN communication line error Gauge control module defective PCM defective Transmission range switch defective	Check the F-CAN communication line for a DTC; K24Z1 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ), K24Z6 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ). Check the F-CAN communication line by using the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function (see THE INDICATOR DRIVE CIRCUIT CHECK ). Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ).
Speedometer and odometer does not work	F-CAN communication line error Gauge control module defective PCM defective Output shaft (countershaft) speed sensor defective	Check the F-CAN communication line for a DTC; K24Z1 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ), K24Z6 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ). Check the F-CAN communication line by using the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ). Check the speedometer drive circuit in the gauge control module using the HDS. Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ). Check for a stored DTC, and check for loose connections. Check the output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage.
Transmission still shifts into 4th or 5th gear in D even though the D3 button is pressed	D3 switch defective D3 switch circuit defective Transmission range switch defective	Check the D3 switch circuit; K24Z1 engine (see D3 SWITCH CIRCUIT TROUBLESHOOTING ), K24Z6 engine (see K24Z6 ENGINE ). Check the D3 switch (see D3 SWITCH TEST ). Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ).
When you turn the ignition switch to ON (II), the D3 indicator comes on and stays on in all shift lever positions, or it never comes on at all	F-CAN communication line error Gauge control module defective PCM defective	Check the F-CAN communication line for a DTC; K24Z1 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ), K24Z6 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ). Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function (see THE INDICATOR DRIVE CIRCUIT CHECK ).
D3 indicator does not come on in D3 driving mode	F-CAN communication line error Gauge control module defective PCM defective D3 switch defective D3 switch circuit defective	Check the F-CAN communication line for a DTC; K24Z1 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ), K24Z6 engine (see DTC B1168: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (ENG MESSAGE); DTC B1169: GAUGE CONTROL MODULE LOST COMMUNICATION WITH THE PCM (A/T MESSAGES) ). Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function (see THE INDICATOR DRIVE CIRCUIT CHECK ). Check the D3 switch circuit; K24Z1 engine (see D3 SWITCH CIRCUIT TROUBLESHOOTING ), K24Z6 engine (see K24Z6 ENGINE ). Check the D3 switch (see D3 SWITCH TEST ).
Shift lever cannot be moved from P while pressing on the brake pedal	Accelerator pedal position sensor circuit Accelerator pedal position sensor defective Brake pedal position switch circuit Brake pedal position switch defective Shift lock solenoid defective Shift lock solenoid control circuit Shift lock mechanism defective Throttle body defective Transmission range switch ATPP switch stuck OFF Transmission range switch ATPP switch circuit open PCM defective	Inspect the APP Sensor signal; K24Z1 engine (see APP SENSOR SIGNAL INSPECTION ), K24Z6 engine (see APP SENSOR SIGNAL INSPECTION ). Troubleshoot the shift lock system circuit; K24Z1 engine (see SHIFT LOCK SYSTEM CIRCUIT TROUBLESHOOTING ), K24Z6 engine (see K24Z6 ENGINE ). Test the shift lock solenoid (see SHIFT LOCK SOLENOID TEST ). Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ).
Ignition switch cannot be moved from ACCESSORY (1) to LOCK (0) (key is pushed in, the shift lever in P)	A problem in the key interlock system of the interlock system	Check the interlock system- key interlock system circuit (see KEY INTERLOCK SYSTEM CIRCUIT TROUBLESHOOTING ).
Engine runs, but vehicle does not move in any gear	Low ATF level Shift cable broken or out of adjustment Connection between the shift cable and transmission or shift lever is worn ATF pump worn or binding Regulator valve stuck or spring worn ATF strainer clogged Mainshaft worn or damaged Final gears worn or damaged Transmission-to-engine assembly error Axle disengaged	Check the ATF level and check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines. Check for a loose shift cable at the shift lever and the selector control lever. Improper alignment of the ATF pump and the torque converter housing may cause the ATF pump seizure The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Check the line pressure (see PRESSURE TEST ). Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the cooler and lines. Replace the torque converter. Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure if not detected. Use the proper tools. Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Vehicle moves in 2 and R, but not in D or 1	1st accumulator defective 1st gears worn or damaged 1st clutch defective	Check the 1st clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate. Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover. Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.
Vehicle moves in D, 1, and R, but not in 2	2nd accumulator defective 2nd gears worn or damaged 2nd clutch defective	Check the 2nd clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Vehicle moves in D, 2, and 1, but not in R	Shift solenoid valve E defective Shift fork shaft stuck Shift valve E defective 4th/reverse accumulator defective 4th clutch defective Reverse gears worn or damaged	Check for a stored DTC, and check for loose connectors. Inspect the O-ring, and check for a seized shift solenoid valve. Check for a missing shift fork bolt on the shift fork shaft. Check the 4th clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate. Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 4th gear and the reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes a clicking, grinding, or whirring noise, also replace the mainshaft 4th gear, the reverse idler gear, and the countershaft 4th gear.
Poor acceleration; flares when starting off in D and R; stall speed high in 2 and 1, and in Din 1st and 2nd	Low ATF level Shift cable broken or out of adjustment ATF pump worn or binding Regulator valve stuck or spring worn ATF strainer clogged Torque converter check valve defective	Check the ATF level, and check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines. Check for a loose shift cable at the shift lever and the selector control lever. Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Check the ATF strainer for debris. If the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Check the torque converter check valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
Poor acceleration; flares when starting off in D and R; stall speed high when starting off in 2	2nd clutch defective	Check the 2nd clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Poor acceleration; flares when starting off in D and R; stall speed high in R	Shift cable broken or out of adjustment 4th clutch defective	Check for a loose shift cable at the shift lever and the selector control shaft. Check the 4th clutch pressure in D and R (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Poor acceleration; stall speed low in 2 and 1, and in Din 1st and 2nd	Shift solenoid valve E defective Torque converter one-way clutch defective Engine output low Torque converter clutch piston defective Lock-up shift valve defective	Check for a stored DTC, and check for loose connectors. Inspect shift solenoid valve E for seizure, and the O-ring for wear and damage. Replace the torque converter. Check the lock-up shift valve in the main valve body for free movement, and check the valve spring for wear and damage.
Poor acceleration; stall speed low in R	Torque converter one-way clutch defective Engine output low Torque converter clutch piston defective Lock-up shift valve defective	Replace the torque converter. Check the lock-up shift valve in the main valve body for free movement, and check the valve spring for wear and damage.
Engine idle vibration	Worn engine or transmission mounts Low ATF level Shift solenoid valve E defective Drive plate defective or transmission (Disassembled Engine output low Torque converter clutch piston defective ATF pump worn or binding Lock-up shift valve defective	Check the engine and transmission mounts. Check the ATF level, and check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines. Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Inspect the ATF strainer for clogging with particles of steel or aluminum. If the ATF strainer is clogged, replace it, and clean the torque converter, cooler, and lines. Check for a stored DTC, and check for loose connectors. Inspect the O-ring, and check for a seized shift solenoid valve. Check for a misinstalled/damaged drive plate. Replace the torque converter. Check the lock-up shift valve in the main valve body for free movement, and check the valve spring for wear and damage.
Vehicle moves in N	Excessive ATF Foreign material in separator plate orifice Relief valve defective 1st clutch defective 2nd clutch defective 3rd clutch defective 4th clutch defective 5th clutch defective Clearance between clutch end-plate and top disc incorrect Needle bearing seized, worn, or damaged Thrust washer seized up, worn, or damaged	Check the ATF level, and drain the ATF if necessary. Check all clutch pressures (see PRESSURE TEST ). Check the ATF strainer for debris. If the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate. Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover. Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide. Replace the secondary shaft if the bushing for the 1st or 3rd clutch feed pipe is loose or damaged. Inspect the 5th clutch feed pipe. If the 5th clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide. Replace the mainshaft if the bushing for the 5th clutch feed pipe is loose or damaged. Check the needle bearings and the thrust washers on all shafts for seizure, wear, and damage.
Delayed engagement after shifting from N to D, or excessive shock when shifting	Worn engine or transmission mounts Shift solenoid valve E defective A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Shift cable broken or out of adjustment Connection between the shift cable and transmission or shift lever is worn Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Foreign material in separator plate orifice Servo control valve defective 1st accumulator defective 1st check ball stuck Lock-up shift valve defective 1st clutch defective	Check the engine and transmission mounts. Check for a stored DTC, and check for loose connectors. Inspect the O-ring, and check for a seized shift solenoid valve. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a loose shift cable at the shift lever and the selector control lever. Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation. Inspect the ATF temperature sensor O-rings. Check the 1st clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate. Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover. Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.
Delayed engagement after shifting from N to R, or excessive shock when shifting	Worn engine or transmission mounts Shift solenoid valve E defective A/T clutch pressure control solenoid valve A defective Shift cable broken or out of adjustment Connection between shift cable and transmission or shift lever is worn Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Shift fork shaft stuck Foreign material in separator plate orifice Shift valve E defective 4th/reverse accumulator defective Lock-up shift valve defective 4th clutch defective	Check the engine and transmission mounts. Check for a stored DTC, and check for loose connectors. Inspect the O-ring, and check for a seized shift solenoid valve. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a loose shift cable at the shift lever and the selector control lever. Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation. Inspect the ATF temperature sensor O-rings. Check for a missing shift fork bolt on the shift fork shaft. Check the 4th clutch pressure (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate. Inspect the servo valve and the O-ring.
Transmission does not shift	Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective	Check for a stored DTC, and check for loose connectors. Check the input shaft (mainshaft) and the output shaft (countershaft) speed sensor installation.
Excessive shock or flares on all upshifts and downshifts	Worm engine or transmission mounts A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Foreign material in separator plate orifice	Check the engine and transmission mounts. Check for a stored DTC, and check for loose connectors. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation. Inspect the ATF temperature sensor O-rings. Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Excessive shock or flares on 1-2 upshift or 2-1 downshift	Worn engine or transmission mounts Shift solenoid valve E defective A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Transmission fluid pressure switch A (2nd clutch) defective Foreign material in separator plate orifice 1st accumulator defective 2nd accumulator defective 1st check ball stuck 2nd check ball stuck Lock-up shift valve defective 1st clutch defective 2nd clutch defective Clearance between clutch end-plate and top disc incorrect	Check the engine and transmission mounts. Check for a stored DT C, and check for loose connectors. Inspect the O-ring, and check for a seized shift solenoid valve. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector. Check the 1st and 2nd clutch pressures (see PRESSURE TEST ). Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Excessive shock or flares on 2-3 upshift or 3-2 downshift	Worn engine or transmission mounts A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Transmission fluid pressure switch B (3rd clutch) defective Foreign material in separator plate orifice 2nd accumulator defective 3rd accumulator defective 2nd check ball stuck 2nd clutch defective 3rd clutch defective Clearance between clutch end-plate and top disc incorrect	Check the engine and transmission mounts. Check for a stored DTC, and check for loose connectors. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector. Check the 2nd and 3rd clutch pressures (see PRESSURE TEST ). Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide. Replace the secondary shaft if the bushing for the 3rd clutch feed pipe is loose or damaged. Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Excessive shock or flares on 3-4 upshift or 4-3 downshift	Worn engine or transmission mounts A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Foreign material in separator plate orifice 3rd accumulator defective 4th accumulator defective 3rd clutch defective 4th clutch defective Clearance between clutch end-plate and top disc incorrect	Check the engine and transmission mounts. Check for a stored DTC, and check for loose connectors. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector. Check the 3rd and 4th clutch pressures (see PRESSURE TEST ). Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide. Replace the secondary shaft if the bushing for the 3rd clutch feed pipe is loose or damaged. Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Excessive shock or flares on 4-5 upshift or 5-4 downshift	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Foreign material in separator plate orifice 4th accumulator defective 5th accumulator defective 4th clutch defective 5th clutch defective Clearance between clutch end-plate and top disc incorrect	Check for a stored DTC, and check for loose connectors. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage. Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the 4th and 5th clutch pressures (see PRESSURE TEST ). Inspect the 5th clutch feed pipe. If the 5th clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide. Replace the mainshaft if the bushing for the 5th clutch feed pipe is loose or damaged. Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat-plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
Noise from transmission in all shift lever positions	ATF pump worn or binding Thrust washer seized, worn, or damaged	Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Vehicle does not accelerate above 31 mph (50 km/h)	Torque converter one-way clutch defective	Replace the torque converter.
Vibration in all shift lever positions	Drive plate defective or transmission misassembled	Check for a misinstalled/damaged drive plate. Adjust the engine and the transmission mounts. Check the stall speed.
Shift lever does not operate smoothly	Transmission range switch defective or out of adjustment Shift cable broken or out of adjustment Connection between the shift cable and transmission or shift lever is worn	Check for a stored DTC, and check for loose connectors. Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable. Check for a loose shift cable at the shift lever and the selector control lever.
Transmission does not shift into P	Shift cable broken or out of adjustment Connection between the shift cable and transmission or shift lever is worn Park mechanism defective	Check for a loose shift cable at the shift lever and the selector control lever. Check the park pawl, the control shaft, and the park lever link for wear and damage. Check if the control shaft lever pin is disengaged from the manual valve guide.
Torque converter clutch does not operate smoothly; torque converter clutch does not engage or disengage	Shift solenoid valve E defective A/T clutch pressure control solenoid valve A defective Torque converter clutch piston defective Torque converter check valve defective Lock-up shift valve defective Lock-up control valve defective Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective	Check for a stored DTC, and check for loose connectors. Inspect the O-rings, and check for a seized shift solenoid valve. Inspect the A/T clutch pressure control solenoid valve with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket for wear and damage. Center all engine mounts. Replace the torque converter. Check the lock-up shift valve in the regulator valve body for free movement, and check the valve springs for wear and damage. Check the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage. Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.
A/T gear position indicator does not indicate shift lever positions	Transmission range switch defective or out of adjustment Shift cable broken or out of adjustment Connection between the shift cable and transmission or shift lever is worn	Check for a stored DTC, and check for loose connectors. Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and the shift cable. Check for a loose shift cable at the shift lever and the selector control lever.
The engine does not rev to high rpm, and the transmission upshifts at low rpm	Low engine power output	Check the engine VTEC rocker arms. Check for a restricted exhaust.