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 CHART

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
No up-shift (3rd -> O/D)	2. ECM	HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
No down-shift (O/D -> 3rd)	1. O/D main switch circuit	O/D MAIN SWITCH CIRCUIT
No down-shift (O/D -> 3rd)	2. 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 P0976 SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); DTC P0977 SHIFT SOLENOID "B" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S2)
	2. Stop light switch circuit *1	TYPICAL MALFUNCTION THRESHOLDS
	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
Up-shift to O/D from 3rd while O/D main switch is OFF	2. 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 P0976 SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); DTC P0977 SHIFT SOLENOID "B" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE S2)
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	DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT); DTC P0850 PARK / NEUTRAL SWITCH INPUT CIRCUIT
	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.

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

ON-VEHICLE REPAIR AND OFF-VEHICLE REPAIR

Symptom	Suspected area	See example
Does not move in any forward positions	Forward clutch (C1)	FORWARD CLUTCH
Does not move in reverse position	1. Direct clutch (C2)	DIRECT CLUTCH
	2. 1st and reverse brake (B3)	AUTOMATIC TRANSAXLE UNIT
	3. U/D brake (B4)	AUTOMATIC TRANSAXLE UNIT
Does not move in any position	1. Valve body assembly (Primary regulator valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Manual valve)	VALVE BODY ASSEMBLY
	3. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
	4. Oil pump	FORWARD CLUTCH
	5. U/D one-way clutch (F3)	FORWARD CLUTCH
	6. Front planetary gear	FORWARD CLUTCH
	7. Rear planetary gear	FORWARD CLUTCH
No-up shift (1st -> 2nd)	1. Valve body assembly (1 - 2 shift valve)	VALVE BODY ASSEMBLY
	2. 2nd brake (B2)	FORWARD CLUTCH
	3. No. 1 one-way clutch (F1)	FORWARD CLUTCH
No-up shift (2nd -> 3rd)	1. Valve body assembly (2 - 3 shift valve)	VALVE BODY ASSEMBLY
No-up shift (2nd -> 3rd)	2. Direct clutch (C2)	FORWARD CLUTCH
No-up shift (3rd -> O/D)	1. Valve body assembly (3 - 4 shift valve)	VALVE BODY ASSEMBLY
No-up shift (3rd -> O/D)	2. U/D clutch (C3)	FORWARD CLUTCH
No-down shift (O/D -> 3rd)	1. Valve body assembly (3 - 4 shift valve)	VALVE BODY ASSEMBLY
	2. U/D brake (B4)	FORWARD CLUTCH
	3. U/D one-way clutch (F3)	FORWARD CLUTCH
No-down shift (3rd -> 2nd)	1. Valve body assembly (2 - 3 shift valve)	VALVE BODY ASSEMBLY
No-down shift (3rd -> 2nd)	2. No. 1 one-way clutch (F1)	FORWARD CLUTCH
No-down shift (2nd -> 1st)	1. Valve body assembly (1 - 2 shift valve)	VALVE BODY ASSEMBLY
No-down shift (2nd -> 1st)	2. No. 2 one-way clutch (F2)	FORWARD CLUTCH
Harsh engagement (N -> R)	1. Valve body assembly (C2 accumulator)	VALVE BODY ASSEMBLY
	2. Direct clutch (C2)	FORWARD CLUTCH
	3. 1st and reverse brake (B3)	FORWARD CLUTCH
Harsh engagement (N -> D)	1. Valve body assembly (C1 accumulator)	VALVE BODY ASSEMBLY
Harsh engagement (N -> D)	2. Forward clutch (C1)	FORWARD CLUTCH
Harsh engagement (N -> L)	1. Valve body assembly (C1 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Low coast modulator valve)	VALVE BODY ASSEMBLY
	3. Forward clutch (C1)	FORWARD CLUTCH
Harsh engagement (1st -> 2nd "D" position)	1. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (B2 accumulator)	VALVE BODY ASSEMBLY
	3. 2nd brake (B2)	FORWARD CLUTCH
	4. No. 1 one-way clutch (F1)	FORWARD CLUTCH
Harsh engagement (1st -> 2nd "2" position)	1. Valve body assembly (B2 accumulator)	VALVE BODY ASSEMBLY
	2. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	3. Valve body assembly (2nd coast modulator control)	VALVE BODY ASSEMBLY
	4. 2nd coast brake (B1)	FORWARD CLUTCH
	5. 2nd brake (B2)	FORWARD CLUTCH
	6. No. 1 one-way clutch (F1)	FORWARD CLUTCH
Harsh engagement (1st -> 2nd -> 3rd -> O/D)	Valve body assembly (Primary regulator valve)	VALVE BODY ASSEMBLY
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 (C2)	FORWARD CLUTCH
Harsh engagement (3rd -> O/D)	1. Valve body assembly (Accumulator control valve)	VALVE BODY ASSEMBLY
	2. Valve body assembly (C3 accumulator)	VALVE BODY ASSEMBLY
	3. U/D clutch (C3)	FORWARD CLUTCH
Harsh engagement (O/D -> 3rd)	1. Valve body assembly (B4 accumulator)	VALVE BODY ASSEMBLY
Harsh engagement (O/D -> 3rd)	2. U/D brake (B4)	FORWARD CLUTCH
Harsh engagement (3rd -> 2nd)	1. Valve body assembly (C2 accumulator)	VALVE BODY ASSEMBLY
Harsh engagement (3rd -> 2nd)	2. Direct clutch (C2)	FORWARD CLUTCH
Slip (Forward & Reverse)	1. Valve body assembly (Primary regulator valve)	VALVE BODY ASSEMBLY
	2. Oil strainer	VALVE BODY ASSEMBLY
	3. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
	4. Oil pump	FORWARD CLUTCH
Slip ("R" position)	1. Direct clutch (C2)	FORWARD CLUTCH
Slip ("R" position)	2. 1st and reverse brake (B3)	FORWARD CLUTCH
Slip (1st)	1. Forward clutch (C1)	FORWARD CLUTCH
	2. No. 2 one-way clutch (F2)	FORWARD CLUTCH
	3. U/D one-way clutch (F3)	FORWARD CLUTCH
Slip (2nd)	1. Forward clutch (C1)	FORWARD CLUTCH
	2. 2nd brake (B2)	FORWARD CLUTCH
	3. No. 1 one-way clutch (F1)	FORWARD CLUTCH
	4. U/D one-way clutch (F3)	FORWARD CLUTCH
Slip (3rd)	1. Forward clutch (C1)	FORWARD CLUTCH
	2. Direct clutch (C2)	FORWARD CLUTCH
	3. U/D one-way clutch (F3)	FORWARD CLUTCH
Slip (O/D)	1. Forward clutch (C1)	FORWARD CLUTCH
	2. Direct clutch (C2)	FORWARD CLUTCH
	3. U/D clutch (C3)	FORWARD CLUTCH
No engine braking (1st "L" position)	1. Valve body assembly (Low coast modulator valve)	VALVE BODY ASSEMBLY
No engine braking (1st "L" position)	2. 1st and reverse brake (B3)	FORWARD CLUTCH
No engine braking (2nd "2" position)	1. Valve body assembly (2nd coast modulator valve)	VALVE BODY ASSEMBLY
No engine braking (2nd "2" position)	2. 2nd coast brake (B1)	FORWARD CLUTCH
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	1. Valve body assembly (Primary regulator valve)	VALVE BODY ASSEMBLY
	2. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
	3. Forward clutch (C1)	FORWARD CLUTCH
No lock-up	1. Valve body assembly (Lock-up relay valve)	VALVE BODY ASSEMBLY
No lock-up	2. Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Engine stalls when starting off or stopping	Torque converter clutch	TORQUE CONVERTER CLUTCH AND DRIVE PLATE