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.
| Symptom | Suspected Area | See page |
|---|---|---|
| No up-shift (1st-> 2nd) | ECM | |
| No up-shift (2nd -> 3rd) | ECM | |
| No up-shift (3rd -> O/D) | Park/neutral position switch circuit | |
| ECM | ||
| No down-shift (O/D -> 3rd) | Park/neutral position switch circuit | |
| ECM | ||
| No down-shift (3rd -> 2nd) | ECM | |
| No down-shift (2nd -> 1st) | ECM | |
| No lock-up or no lock-up off | Stop light switch circuit | |
| ECM | ||
| Shift point too high or too low | ECM | |
| Up-shift to 2nd while shift lever is on L | Park/neutral position switch circuit | |
| ECM | ||
| Up-shift to 3rd while shift lever is on 2 | Park/neutral position switch circuit | |
| ECM | ||
| Up-shift to O/D from 3rd while shift lever is on 3 | Park/neutral position switch circuit | |
| ECM | ||
| Up-shift to O/D from 3rd while engine is cold | ECM | |
| Poor acceleration | ECM | |
| No kick-down | ECM | |
| Engine stalls when starting off or stopping | ECM |
| Symptom | Suspected Area | See page |
|---|---|---|
| Vehicle does not move in all positions other than P and N | Shift solenoid valve SLT | |
| Transmission control cable | ||
| Manual valve | ||
| Parking lock pawl | ||
| 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) | 1-2 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No up-shift (2nd -> 3rd) | 2-3 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No up-shift (3rd -> O/D) | 3-4 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No down-shift (O/D -> 3rd) | 3-4 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No down-shift (3rd -> 2nd) | 2-3 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No down-shift (2nd -> 1st) | 1-2 shift valve | |
| Off-vehicle repair matrix chart | - | |
| No lock-up or no lock-up off | Lock-up control valve | |
| Lock-up relay valve | ||
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (N -> D) | Accumulator control valve | |
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (lock-up) | Lock-up control valve | |
| Lock-up relay valve | ||
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (N -> R) | Accumulator control valve | |
| C2 accumulator | ||
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (N -> L) | Low coast modulator valve | |
| Harsh engagement (1st -> 2nd/shift lever on D) | Accumulator control valve | |
| B2 accumulator | ||
| Harsh engagement (1st -> 2nd/shift lever on 2) | Accumulator control valve | |
| B2 accumulator | ||
| Harsh engagement (1st -> 2nd -> 3rd -> O/D) | Accumulator control valve | |
| Throttle position sensor | ||
| Harsh engagement (2nd -> 3rd) | Accumulator control valve | |
| C2 accumulator | ||
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (3rd -> O/D) | Accumulator control valve | |
| Solenoid modulator valve | ||
| Off-vehicle repair matrix chart | - | |
| Harsh engagement (O/D -> 3rd) | Accumulator control valve | |
| C0 accumulator | ||
| Off-vehicle repair matrix chart | - | |
| Slip or shudder (shift lever forward and reverse position) | Shift solenoid valve SLT | |
| Transmission control cable | ||
| Oil strainer | ||
| Pressure relief valve | ||
| Off-vehicle repair matrix chart | - | |
| Slip or shudder (particular shift lever position) | Shift solenoid valve SLT | |
| Transmission control cable | ||
| Off-vehicle repair matrix chart | - | |
| No engine braking (1st/shift lever on L) | Low coast modulator valve | |
| Off-vehicle repair matrix chart | - | |
| No engine braking (2nd/shift lever on 2) | 2nd coast modulator valve | |
| Off-vehicle repair matrix chart | - | |
| No kick-down | 1-2 shift valve | |
| 2-3 shift valve |
| Symptom | Suspected Area | See page |
|---|---|---|
| Vehicle does not move in all positions other than P and N | F0 O/D one-way clutch | |
| C0 O/D direct clutch | ||
| B0 O/D brake | ||
| O/D planetary gear unit | ||
| Torque converter clutch | ||
| Vehicle does not move when shift lever is on R | B1 2nd coast brake | |
| Front and rear planetary gear unit | ||
| C2 direct clutch | ||
| B3 1st and reverse brake | ||
| C0 O/D direct clutch | ||
| Vehicle does not move when shift lever is on D, 2 or L | C2 forward clutch | |
| Vehicle does not move when shift lever is on D or 2 | F2 one-way clutch | |
| Vehicle does not move when shift lever is on 2 | B3 1st and reverse brake | |
| Vehicle does not move when shift lever is on L | B2 2nd brake | |
| B1 2nd coast brake | ||
| C2 direct clutch | ||
| No up-shift (1st -> 2nd) | B2 2nd brake | |
| F1 one-way clutch | ||
| No up-shift (2nd -> 3rd) | C2 direct clutch | |
| No up-shift (3rd -> O/D) | B0 O/D brake | |
| No down-shift (2nd -> 1st) | B1 2nd coast brake | |
| B2 2nd brake | ||
| No lock-up or no lock-up off | Torque converter clutch | |
| Harsh engagement (N -> D) | C1 forward clutch | |
| Harsh engagement (N -> R) | C2 direct clutch | |
| B3 1st and reverse brake | ||
| Harsh engagement (2nd -> 3rd) | B1 2nd coast brake | |
| Harsh engagement (3rd -> O/D) | C0 O/D direct clutch | |
| B0 O/D brake | ||
| O/D planetary gear unit | ||
| Harsh engagement (O/D -> 3rd) | B0 O/D brake | |
| Harsh engagement (lock-up) | Torque converter clutch | |
| Slip or shudder (forward and reverse/after warm-up) | Torque converter clutch | |
| F0 O/D one-way clutch | ||
| C0 O/D direct clutch | ||
| Slip or shudder (forward and reverse/just after engine starts) | Torque converter clutch | |
| Slip or shudder (shift lever on R) | C2 direct clutch | |
| B3 1st and reverse brake | ||
| Slip or shudder (1st) | C1 forward clutch | |
| B3 1st and reverse brake | ||
| Slip or shudder (2nd) | B2 2nd brake | |
| B1 2nd coast brake | ||
| F1 one-way clutch | ||
| Slip or shudder (3rd) | C2 direct clutch | |
| Slip or shudder (O/D) | B0 O/D brake | |
| No engine braking (3rd -> 1st/shift lever on D) | C0 O/D direct clutch | |
| No engine braking (1st/shift lever on L) | B3 1st and reverse brake | |
| No engine braking (2nd/shift lever on 2) | B1 2nd coast brake | |
| Poor acceleration (all shift lever positions) | Torque converter clutch | |
| Poor acceleration (O/D) | C0 O/D direct clutch | |
| O/D planetary gear unit | ||
| Poor acceleration (other than O/D) | B0 O/D brake | |
| Poor acceleration (other than 2nd) | B1 2nd coast brake | |
| B2 2nd brake | ||
| Poor acceleration (1st and 2nd) | C2 direct clutch | |
| Poor acceleration (shift lever on L or R) | B3 1st and reverse brake | |
| Poor acceleration (shift lever on R) | C1 forward clutch | |
| Engine stalls when starting off or stopping | Torque converter clutch |