AUTOMATIC TRANSMISSION SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
The Matrix Chart is divided into 3 chapters. When troubleshooting, check Chapter 1 first. If instructions are given in Chapter 2 to proceed to 3, proceed as instructed.
If the instruction "Proceed to next circuit inspection shown in problem symptoms table" is given in the flowchart for each circuit, proceed to the next suspected area in the table.
If the problem still occurs even though there are no malfunctions in any of the circuits, check the ECM and replace it if necessary.

1. CHAPTER 1: ELECTRONIC CIRCUIT MATRIX CHART
Symptom	Suspected Area	See page
No up-shift (1st -> 2nd)	ECM	Click here
No up-shift (2nd -> 3rd)	ECM	Click here
No up-shift (3rd -> O/D)	1. Transmission control switch circuit	Click here
No up-shift (3rd -> O/D)	2. ECM	Click here
No down-shift (O/D -> 3rd)	1. Transmission control switch circuit	Click here
No down-shift (O/D -> 3rd)	2. ECM	Click here
No down-shift (3rd -> 2nd)	ECM	Click here
No down-shift (2nd -> 1st)	ECM	Click here
No lock-up or no lock-up off	1. Stop light switch circuit	Click here
No lock-up or no lock-up off	2. ECM	Click here
Shift point too high or too low	ECM	Click here
Up-shift to 2nd while shift lever is on L	1. Park/Neutral position switch circuit	Click here
Up-shift to 2nd while shift lever is on L	2. ECM	Click here
Up-shift to 3rd while shift lever is on 2	1. Park/Neutral position switch circuit	Click here
Up-shift to 3rd while shift lever is on 2	2. ECM	Click here
Up-shift to O/D from 3rd while shift lever is on 3	1. Transmission control switch circuit	Click here
Up-shift to O/D from 3rd while shift lever is on 3	2. ECM	Click here
Up-shift to O/D from 3rd while engine is cold	ECM	Click here
Poor acceleration	ECM	Click here
No kick-down	ECM	Click here
Engine stalls when starting off or stopping	ECM	Click here

2. CHAPTER 2: ON-VEHICLE REPAIR
Symptom	Suspected Area	See page
Vehicle does not move in all positions other than P and N	1. Shift solenoid valve SLT	Click here
	2. Transmission control cable	Click here
	3. Manual valve	Click here
	4. Parking lock pawl	Click here
	5. Off-vehicle repair matrix chart	-
Vehicle does not move when shift lever is on R	Off-vehicle repair matrix chart	-
Vehicle does not move in one or more positions other than P, N and R	Off-vehicle repair matrix chart	-
No up-shift (1st -> 2nd)	1. 1-2 shift valve	Click here
No up-shift (1st -> 2nd)	2. Off-vehicle repair matrix chart	-
No up-shift (2nd -> 3rd)	1. 2-3 shift valve	Click here
No up-shift (2nd -> 3rd)	2. Off-vehicle repair matrix chart	-
No up-shift (3rd -> O/D)	1. 3-4 shift valve	Click here
No up-shift (3rd -> O/D)	2. Off-vehicle repair matrix chart	-
No down-shift (O/D -> 3rd)	1. 3-4 shift valve	Click here
No down-shift (O/D -> 3rd)	2. Off-vehicle repair matrix chart	-
No down-shift (3rd -> 2nd)	1. 2-3 shift valve	Click here
No down-shift (3rd -> 2nd)	2. Off-vehicle repair matrix chart	-
No down-shift (2nd -> 1st)	1. 1-2 shift valve	Click here
No down-shift (2nd -> 1st)	2. Off-vehicle repair matrix chart	-
No lock-up or no lock-up off	1. Lock-up control valve	Click here
	2. Lock-up relay valve	Click here
	3. Off-vehicle repair matrix chart	-
Harsh engagement (N -> D)	1. Accumulator control valve	Click here
Harsh engagement (N -> D)	2. Off-vehicle repair matrix chart	-
Harsh engagement (lock-up)	1. Lock-up control valve	Click here
	2. Lock-up relay valve	Click here
	3. Off-vehicle repair matrix chart	-
Harsh engagement (N -> R)	1. Accumulator control valve	Click here
	2. C2 accumulator	Click here
	3. Off-vehicle repair matrix chart	-
Harsh engagement (N -> L)	Low coast modulator valve	Click here
Harsh engagement (1st -> 2nd/shift lever on D)	1. Accumulator control valve	Click here
Harsh engagement (1st -> 2nd/shift lever on D)	2. B2 accumulator	Click here
Harsh engagement (1st -> 2nd/shift lever on 2)	1. Accumulator control valve	Click here
Harsh engagement (1st -> 2nd/shift lever on 2)	2. B2 accumulator	Click here
Harsh engagement (1st -> 2nd -> 3rd -> O/D)	1. Accumulator control valve	Click here
Harsh engagement (1st -> 2nd -> 3rd -> O/D)	2. Throttle valve	Click here
Harsh engagement (2nd -> 3rd)	1. Accumulator control valve	Click here
	2. C2 accumulator	Click here
	3. Off-vehicle repair matrix chart	-
Harsh engagement (3rd -> O/D)	1. Accumulator control valve	Click here
	2. Solenoid modulator valve	Click here
	3. Off-vehicle repair matrix chart	-
Harsh engagement (O/D -> 3rd)	1. Accumulator control valve	Click here
	2. C0 accumulator	Click here
	3. Off-vehicle repair matrix chart	-
Slip or shudder (shift lever forward and reverse position)	1. Shift solenoid valve SLT	Click here
	2. Transmission control cable	Click here
	3. Oil strainer	Click here
	4. Pressure relief valve	Click here
	5. Off-vehicle repair matrix chart	-
Slip or shudder (particular shift lever position)	1. Shift solenoid valve SLT	Click here
	2. Transmission control cable	Click here
	3. Off-vehicle repair matrix chart	-
No engine braking (1st/shift lever on L)	1. Low coast modulator valve	Click here
No engine braking (1st/shift lever on L)	2. Off-vehicle repair matrix chart	-
No engine braking (2nd/shift lever on 2)	1. 2nd coast modulator valve	Click here
No engine braking (2nd/shift lever on 2)	2. Off-vehicle repair matrix chart	-
No kick-down	1. 1-2 shift valve	Click here
No kick-down	2. 2-3 shift valve	Click here

3. CHAPTER 3: OFF-VEHICLE REPAIR
Symptom	Suspected Area	See page
Vehicle does not move in all positions other than P and N	1. F0 O/D one-way clutch	Click here
	2. C0 O/D direct clutch	Click here
	3. B0 O/D brake	Click here
	4. O/D planetary gear unit	Click here
	5. Torque converter clutch	Click here
Vehicle does not move when shift lever is on R	1. B1 2nd coast brake	Click here
	2. Front and rear planetary gear unit	Click here
	3. C2 direct clutch	Click here
	4. B3 1st and reverse brake	Click here
	5. C0 O/D direct clutch	Click here
Vehicle does not move when shift lever is on D, 2 and L	C2 forward clutch	Click here
Vehicle does not move when shift lever is on D and 2	F2 one-way clutch	Click here
Vehicle does not move when shift lever is on 2	B3 1st and reverse brake	Click here
Vehicle does not move when shift lever is on L	1. B2 2nd brake	Click here
	2. B1 2nd coast brake	Click here
	3. C2 direct clutch	Click here
No up-shift (1st -> 2nd)	1. B2 2nd brake	Click here
No up-shift (1st -> 2nd)	2. F1 one-way clutch	Click here
No up-shift (2nd -> 3rd)	C2 direct clutch	Click here
No up-shift (3rd -> O/D)	B0 O/D brake	Click here
No down-shift (2nd -> 1st)	1. B1 2nd coast brake	Click here
No down-shift (2nd -> 1st)	2. B2 2nd brake	Click here
No lock-up or no lock-up off	Torque converter clutch	Click here
Harsh engagement (N -> D)	C1 Forward clutch	Click here
Harsh engagement (N -> R)	1. C2 direct clutch	Click here
Harsh engagement (N -> R)	2. B3 1st and reverse brake	Click here
Harsh engagement (2nd -> 3rd)	B1 2nd coast brake	Click here
Harsh engagement (3rd -> O/D)	1. C0 O/D direct clutch	Click here
	2. B0 O/D brake	Click here
	3. O/D planetary gear unit	Click here
Harsh engagement (O/D -> 3rd)	B0 O/D brake	Click here
Harsh engagement (lock-up)	Torque converter clutch	Click here
Slip or shudder (forward and reverse/after warm-up)	1. Torque converter clutch	Click here
	2. F0 O/D one-way clutch	Click here
	3. C0 O/D direct clutch	Click here
Slip or shudder (forward and reverse/just after engine starts)	Torque converter clutch	Click here
Slip or shudder (shift lever on R)	1. C2 direct clutch	Click here
Slip or shudder (shift lever on R)	2. B3 1st and reverse brake	Click here
Slip or shudder (1st)	1. C1 forward clutch	Click here
Slip or shudder (1st)	2. B3 1st and reverse brake	Click here
Slip or shudder (2nd)	1. B2 2nd brake	Click here
	2. B1 2nd coast brake	Click here
	3. F1 one-way clutch	Click here
Slip or shudder (3rd)	C2 direct clutch	Click here
Slip or shudder (O/D)	B0 O/D brake	Click here
No engine braking (3rd -> 1st/shift lever on D)	C0 O/D direct clutch	Click here
No engine braking (1st/shift lever on L)	B3 1st and reverse brake	Click here
No engine braking (2nd/shift lever on 2)	B1 2nd coast brake	Click here
Poor acceleration (all shift lever positions)	Torque converter clutch	Click here
Poor acceleration (O/D)	1. C0 O/D direct clutch	Click here
Poor acceleration (O/D)	2. O/D planetary gear unit	Click here
Poor acceleration (other than O/D)	B0 O/D brake	Click here
Poor acceleration (other than 2nd)	1. B1 2nd coast brake	Click here
Poor acceleration (other than 2nd)	2. B2 2nd brake	Click here
Poor acceleration (1st and 2nd)	C2 direct clutch	Click here
Poor acceleration (shift lever on L and R)	B3 1st and reverse brake	Click here
Poor acceleration (shift lever on R)	C1 forward clutch	Click here
Engine stalls when starting off or stopping	Torque converter clutch	Click here