Problem Symptoms Table

If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the charts on the following pages and proceed to the page given for troubleshooting.

The Matrix Chart is divided into 3 chapters.

1. Chapter 1: Electronic Circuit Matrix Chart 
2. Chapter 2: On-vehicle Repair Matrix Chart 
3. Chapter 3: Off-vehicle Repair Matrix Chart 

• If the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
• If the trouble still occurs even though there are no abnormalities in any of the other circuits, then check and replace the ECM.

1. Chapter 1: Electronic Circuit Matrix Chart 

   HINT:

   *1: When a malfunction is on the circuit *1 mark is attached, DTC is output.

   PROBLEM SYMPTOMS TABLE - AUTOMATIC TRANSMISSION (ELECTRONIC CIRCUITS)
   
   

   Symptom	Suspect Area
   No up-shift (A particular gear, from 1st to 4th gear, is not up-shifted)	Shift solenoid valve (S1) circuit *1 Shift solenoid valve (S2) circuit *1 ECM
   No up-shift (4th → 5th)	Transmission control switch circuit (D - 4) *1 Engine coolant temp, sensor circuit *1 Speed sensor NT circuit *1 Shift solenoid valve (SL1) circuit *1 Shift solenoid valve (SL2) circuit *1 Shift solenoid valve (SR) circuit *1 ECM
   No up-shift (3rd → 4th)	Engine coolant temp, sensor circuit *1 Shift solenoid valve (S2) circuit *1 ECM
   No up-shift (1st → 2nd)	Transmission control switch circuit (2 - L) *1 Shift solenoid valve (S2) circuit *1 ECM
   No down-shift (5th → 4th)	Transmission control switch circuit (D - 4) *1 Shift solenoid valve (SL1) circuit *1 Shift solenoid valve (SL2) circuit *1 Shift solenoid valve (SR) circuit *1 ECM
   No down-shift (2nd → 1st)	Transmission control switch circuit (2 - L) *1 Shift solenoid valve (S2) circuit *1 ECM
   No down-shift (A particular gear, from 1st to 4th gear, is not down-shifted)	Shift solenoid valve (S1) circuit *1 Shift solenoid valve (S2) circuit *1 ECM
   No lock-up	ATF temperature sensor circuit *1 Transfer L4 position switch circuit *1 Stop light switch circuit *1 Speed sensor NT circuit *1 Shift solenoid valve (SLU) circuit *1 ECM
   No lock-up off	ECM
   Shift point too high or too low	Shift solenoid valve (SLT) circuit *1 Speed sensor NT circuit *1 Speed sensor SP2 circuit *1 Throttle position sensor circuit *1 ATF temperature sensor circuit *1 Pattern select switch circuit (PWR mode switch) Transfer L4 position switch circuit *1 ECM
   Up-shift to 5th from 4th while shift lever is 4 position	Transmission control switch circuit (D - 4) *1 ECM
   Up-shift to 5th from 4th while engine is cold	Engine coolant temp, sensor circuit *1 ECM
   Up-shift to 4th from 3rd while shift lever is 3 position	Park/neutral position switch circuit *1 ECM
   Up-shift to 3rd from 2nd while shift lever is 2 position	Park/neutral position switch circuit *1 ECM
   Up-shift to 2nd from 1st while shift lever is L position	Transmission control switch circuit (2 - L) *1 ECM
   Harsh engagement (N -*1 )	Speed sensor NT circuit *1 Shift solenoid valve (SL1) circuit *1 Shift solenoid valve (SLT) circuit *1 ECM
   Harsh engagement (Lock-up)	Speed sensor NT circuit *1 Speed sensor SP2 circuit *1 Shift solenoid valve (SLU) circuit *1 ECM
   Harsh engagement (Any driving position)	ECM
   Poor acceleration	ATF temperature sensor No.2 circuit *1 ECM
   No engine braking	ECM
   No kick-down	ECM
   Engine stalls when starting off or stopping	ECM
   No pattern select (PWR)	Pattern select switch circuit (PWR mode switch) ECM
   No 2nd start	Pattern select switch circuit (2nd start switch) Transmission control switch circuit (2 - L) *1 ECM
   AT Oil Temp, warning light remains on	ATF temperature sensor No.2 circuit 1 ECM
   	Lock-up at 3rd gear
   	Shift point too high
   A/T.P. indicator light does not light up	A/T.P. indicator light circuit Combination meter circuit ECM

2. Chapter 2: On-Vehicle Repair 

   *: See appropriate AUTOMATIC TRANSMISSION OVERHAUL article) 

   Fig 1: Vehicle Repair Index Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Chapter 3: Off-Vehicle Repair 

   *: See appropriate AUTOMATIC TRANSMISSION OVERHAUL article) 

   Fig 2: Vehicle Repair Index Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002