Automatic Transmission Basic Inspection

AUTOMATIC TRANSMISSION BASIC INSPECTION

STEP	INSPECTION		ACTION
1	Connect WDS or equivalent to data link connector-2. Turn ignition switch to ON. Retrieve any diagnostic trouble code. Is "PASSED" displayed?	Yes	No diagnostic trouble code is displayed: Go to next step.
1		No	Diagnostic trouble code is displayed: Go to appropriate diagnostic trouble code test. If communication error message is displayed on WDS or equivalent, inspect for the following: Open circuit between main relay and PCM terminal B Open main relay ground circuit Main relay stuck open circuit. Open or poor ground circuit (PCM terminal 3A, 3B or 4A). Poor connection of vehicle body ground.
2	Turn ignition switch to ON. Does O/D OFF indicator light (illuminate/go out) correspond to O/D OFF switch position (ON/OFF)?	Yes	Go to next step.
2		No	Go to symptom troubleshooting No. 25 "NO. 25 O/D OFF INDICATOR LIGHT DOES NOT ILLUMINATE WHEN O/D OFF SWITCH IS TURNED ON " or No. 26 "O/D OFF INDICATOR LIGHT ILLUMINATES WHEN O/D OFF SWITCH IS NOT TURNED ON ".
3	Inspect ATF color and condition. (See ATF CONDITION INSPECTION ) Are ATF color, odor and level okay?	Yes	Go to next step.
3		No	Repair or replace any defective parts according to inspection result. Flush automatic transmission and cooler line if necessary.
4	Perform line pressure test. (See LINE PRESSURE TEST ) Is line pressure okay?	Yes	Go to next step.
4		No	Adjust throttle cable if necessary. (See THROTTLE CABLE ADJUSTMENT ) Repair or replace any defective parts according to inspection result.
5	Perform stall test. (See STALL TEST ) Is stall speed okay?	Yes	Go to next step.
5	Perform stall test. (See STALL TEST ) Is stall speed okay?	No	Repair or replace any defective parts according to inspection result.
6	Turn ignition switch off. Disconnect TCM connector. Inspect for continuity between TCM terminal AP and ground. Is there continuity?	Yes	Reconnect TCM connector. Go to next step.
6		No	Inspect ground condition. Repair or replace ground circuit if necessary.
7	Access TCM. Inspect voltage at the following TCM terminals: (See TRANSMISSION CONTROL MODULE (TCM) INSPECTION ) Throttle position sensor signal (terminal U) Output speed sensor signal (terminals AF and AE) Input/turbine speed sensor signal (terminals W and Z) R position signal (terminal D) N position signal (terminal F) D range signal (terminal C) 2 range signal (terminal B) 1 range signal (terminal A) Are all terminal voltages okay?	Yes	Go to appropriate symptom troubleshooting and follow procedures.
7		No	Inspect the following, then go to appropriate symptom troubleshooting and follow procedures: Throttle position sensor: Inspect for open or short circuit between throttle position sensor and TCM terminals U and R. Inspect throttle position sensor adjustment. Output speed sensor: Inspect for open or short circuit between output speed sensor and TCM terminal AF or AE. Inspect for damage of sensor rotor and sensor. Inspect output speed sensor. Input/turbine speed sensor: Inspect for open or short circuit between input/turbine speed sensor and TCM terminal W or Z. Inspect for damage of teeth on outer shell. Inspect input/turbine speed sensor. Inspect automatic transmission for internal damage. Transmission range switch signal (R, N, D, 2, and/or 1 range): Inspect transmission range switch adjustment. Inspect shift linkage adjustment (include automatic transmission internal related part). Inspect for open or short circuit between transmission range switch and TCM terminals.