Problem Symptoms Table

HINT:

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 in the following examples and proceed to the step given for troubleshooting.
The Matrix Chart is divided into 2 chapters.
When the circuit on which mark *1 is attached is a malfunction, DTC could be output.

Refer to the table below when the trouble cause is considered to be electrical the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart of 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, check and replace the ECM.

Chapter 1: Electronic Circuit Matrix Chart

ELECTRONIC CIRCUIT MATRIX SYMPTOM

Symptom	Suspected area	See example
No up-shift (A particular gear, from 1st to 3rd gear, is not up-shifted)	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No up-shift (3rd -> O/D)	1. O/D main switch circuit	O/D MAIN SWITCH CIRCUIT
	2. Electronically controlled transmission communication circuit *2	COMMUNICATION CIRCUIT BETWEEN ECM AND CRUISE
	3. O/D cancel signal circuit *2	O/D MAIN SWITCH CIRCUIT
	4. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No down-shift (O/D -> 3rd)	1. O/D main switch circuit	O/D MAIN SWITCH CIRCUIT
	2. Electronically controlled transmission communication circuit *2	COMMUNICATION CIRCUIT BETWEEN ECM AND CRUISE
	3. O/D cancel signal circuit *2	O/D MAIN SWITCH CIRCUIT
	4. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No down-shift (A particular gear, from 3rd to 1st gear, is not down-shifted)	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No lock-up or No lock-up off	1. Shift solenoid valve (SL) circuit *1	DTC P2716 PRESSURE CONTROL SOLENOID "D" ELECTRICAL (SHIFT SOLENOID VALVE SLT)
	2. Stop light switch circuit *1	DTC P0711 TRANSMISSION FLUID TEMPERATURE SENSOR "A" PERFORMANCE
	3. Engine coolant temp. sensor circuit *1	DIAGNOSTIC TROUBLE CODE CHART
	4. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Shift point too high or too low	1. Throttle position sensor circuit *1	DIAGNOSTIC TROUBLE CODE CHART
	2. Shift solenoid valve (SLT) circuit *1	DTC P0973 SHIFT SOLENOID "A" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S1): DTC P0974 SHIFT SOLENOID "A" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S1)
	3. Engine coolant temp. sensor circuit *1	DIAGNOSTIC TROUBLE CODE CHART
	4. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Up-shift to 2nd while in L position	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Up-shift to 3rd while in 2 position	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Up-shift to O/D from 3rd while O/D main switch is OFF	1. O/D main switch circuit	O/D MAIN SWITCH CIRCUIT
	2. Electronically controlled transmission communication circuit *2	COMMUNICATION CIRCUIT BETWEEN ECM AND CRUISE
	3. O/D cancel signal circuit *2	O/D MAIN SWITCH CIRCUIT
	4. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Up-shift to O/D from 3rd while engine is cold	1. Engine coolant temp. sensor circuit *1	DIAGNOSTIC TROUBLE CODE CHART
Up-shift to O/D from 3rd while engine is cold	2. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Harsh engagement (N -> D)	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Harsh engagement (Lock-up)	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Harsh engagement (Any driving position)	1. Shift solenoid valve (SLT) circuit *1	DTC P0973 SHIFT SOLENOID "A" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S1): DTC P0974 SHIFT SOLENOID "A" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S1)
Harsh engagement (Any driving position)	2. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Poor acceleration	1. Shift solenoid valve (SLT) circuit *1	DTC P0973 SHIFT SOLENOID "A" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S1): DTC P0974 SHIFT SOLENOID "A" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S1)
Poor acceleration	2. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Engine stalls when starting off or stopping	1. Shift solenoid valve (SL) circuit *1	DTC P2716 PRESSURE CONTROL SOLENOID "D" ELECTRICAL (SHIFT SOLENOID VALVE SLT)
Engine stalls when starting off or stopping	2. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No kick-down	ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Malfunction in shifting	1. Park/neutral position switch circuit *1	PARK / NEUTRAL POSITION SWITCH
	2. O/D main switch circuit	O/D MAIN SWITCH CIRCUIT
	3. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS

HINT:

*1: When the circuit on which mark *1 is detective, a DTC may be output.
*2: w/ Cruise control

Chapter 2: On-Vehicle Repair and Off-Vehicle Repair

ON-VEHICLE REPAIR AND OFF-VEHICLE REPAIR SYMPTOM

Symptom	Suspected area	See example
Vehicle does not move in any forward position and reverse position	1. Valve body assembly (Manual valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Primary regulator valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (Secondary regulator valve)	VALVE BODY ASSEMBLY
	4. Planetary gear unit	AUTOMATIC TRANSAXLE UNIT
	5. Forward clutch	AUTOMATIC TRANSAXLE UNIT
	6. One-way clutch No. 2	AUTOMATIC TRANSAXLE UNIT
	7. Reverse Clutch	AUTOMATIC TRANSAXLE UNIT
	8. 1st and reverse brake	AUTOMATIC TRANSAXLE UNIT
Vehicle does not move in R position	1. Valve body assembly (Manual valve)	VALVE BODY ASSEMBLY
	2. Planetary gear unit	AUTOMATIC TRANSAXLE UNIT
	3. Reverse Clutch	AUTOMATIC TRANSAXLE UNIT
	4. 1st and reverse brake	AUTOMATIC TRANSAXLE UNIT
No up-shift (1st -> 2nd)	1. Valve body assembly (1-2 shift valve)	VALVE BODY ASSEMBLY
	2. 2nd brake	AUTOMATIC TRANSAXLE UNIT
	3. One-way clutch No. 1	AUTOMATIC TRANSAXLE UNIT
No up-shift (2nd -> 3rd)	1. Valve body assembly (2-3 shift valve)	VALVE BODY ASSEMBLY
No up-shift (2nd -> 3rd)	2. Direct clutch	AUTOMATIC TRANSAXLE UNIT
No up-shift (3rd -> O/D)	1. Valve body assembly (3-4 shift valve)	VALVE BODY ASSEMBLY
No up-shift (3rd -> O/D)	2. O/D and 2nd brake	AUTOMATIC TRANSAXLE UNIT
No down-shift (O/D -> 3rd)	Valve body assembly (3-4 shift valve)	VALVE BODY ASSEMBLY
No down-shift (3rd -> 2nd)	Valve body assembly (2-3 shift valve)	VALVE BODY ASSEMBLY
No down-shift (2nd -> 1st)	Valve body assembly (1-2 shift valve)	VALVE BODY ASSEMBLY
No lock-up or No lock-up off	1. Valve body assembly (Lock-up relay valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Lock-up control valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (Solenoid relay valve)	VALVE BODY ASSEMBLY
	4. Valve body assembly (Solenoid modulator valve)	VALVE BODY ASSEMBLY
	5. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Harsh engagement (N -> D)	1. Valve body assembly (C1 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Forward clutch	AUTOMATIC TRANSAXLE UNIT
	4. One-way clutch No. 2	AUTOMATIC TRANSAXLE UNIT
Harsh engagement (N -> R)	1. Valve body assembly (C3 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (Reverse control valve)	VALVE BODY ASSEMBLY
	4. Reverse clutch	AUTOMATIC TRANSAXLE UNIT
	5. 1st and reverse brake	AUTOMATIC TRANSAXLE UNIT
Harsh engagement (Lock-up)	1. Valve body assembly (Lock-up relay valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (Lock-up control valve)	VALVE BODY ASSEMBLY
	4. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Harsh engagement (1st -> 2nd)	1. Valve body assembly (B2 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. 2nd brake	AUTOMATIC TRANSAXLE UNIT
	4. One-way clutch No. 1	AUTOMATIC TRANSAXLE UNIT
Harsh engagement (2nd -> 3rd)	1. Valve body assembly (C2 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Direct clutch	AUTOMATIC TRANSAXLE UNIT
Harsh engagement (3rd -> O/D)	1. Valve body assembly (B1 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (3-4 shift timing valve)	VALVE BODY ASSEMBLY
	4. O/D and 2nd brake	AUTOMATIC TRANSAXLE UNIT
Harsh engagement (O/D -> 3)	1. Valve body assembly (3-4 shift timing valve)	VALVE BODY ASSEMBLY
Harsh engagement (O/D -> 3)	2. Valve body assembly (4-3 shift timing valve)	VALVE BODY ASSEMBLY
Harsh engagement (D, 2, L position)	Valve body assembly (Coat relay valve)	VALVE BODY ASSEMBLY
Slip or shudder (Forward and reverse)	1. Oil strainer	VALVE BODY ASSEMBLY
	2. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
	3. Forward clutch	AUTOMATIC TRANSAXLE UNIT
	4. Direct clutch	AUTOMATIC TRANSAXLE UNIT
	5. O/D and 2nd brake	AUTOMATIC TRANSAXLE UNIT
	6. 2nd brake	AUTOMATIC TRANSAXLE UNIT
	7. One-way clutch No. 1	AUTOMATIC TRANSAXLE UNIT
	8. One-way clutch No. 2	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (Reverse position)	1. Reverse clutch	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (Reverse position)	2. 1st and reverse brake	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (1st)	One-way clutch No. 2	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (2nd)	1. 2nd brake	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (2nd)	2. One-way clutch No. 1	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (3rd)	Direct clutch	AUTOMATIC TRANSAXLE UNIT
Slip or shudder (O/D)	O/D and 2nd brake	AUTOMATIC TRANSAXLE UNIT
No engine braking (1st: L position)	1. Valve body assembly (Reverse control valve)	VALVE BODY ASSEMBLY
No engine braking (1st: L position)	2. 1st and reverse brake	AUTOMATIC TRANSAXLE UNIT
No engine braking (2nd: 2 position)	1. Valve body assembly (3-4 shift valve)	VALVE BODY ASSEMBLY
No engine braking (2nd: 2 position)	2. O/D and 2nd brake	AUTOMATIC TRANSAXLE UNIT
No kick-down	1. Valve body assembly (1-2 shift valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (2-3 shift valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (3-4 shift valve)	VALVE BODY ASSEMBLY
Poor acceleration (All position)	1. Valve body assembly	VALVE BODY ASSEMBLY
Poor acceleration (All position)	2. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Large shift shock or engine stalls when starting off or stopping	Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE