Tech Tips
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 2 chapters.
When the circuit on which mark *1 is attached is a malfunction, DTC could be output.
Chapter 1:
Refer to the table below when the trouble cause is considered to be electrical. If the instruction PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE is given in the flowchart of each circuit, inspect the suspected areas in descending order for each symptom. If the trouble still occurs even though there are no abnormalities in the inspections listed for the symptoms, check and replace the ECM.
| Symptom | Suspected Area | See page |
|---|---|---|
| No down-shift (A particular gear, from 1st to 4th gear, is not down-shifted) | ECM | |
| No down-shift (5th -> 4th) | Park/neutral position switch circuit *1 | |
| Shift solenoid valve (S4) circuit *1 | ||
| ECM | ||
| No up-shift (A particular gear, from 1st to 4th gear, is not up-shifted) | ECM | |
| No up-shift (4th -> 5th) | Park/neutral position switch circuit *1 | |
| Shift solenoid valve (S4) circuit *1 | ||
| ECM | ||
| No lock-up | Stop light switch circuit *1 | |
| Engine coolant temp. sensor circuit *1 | ||
| ECM | ||
| No lock-up off | ECM | |
| Shift point too high or too low | Throttle position sensor circuit *1 | |
| ECM | ||
| Up-shift to 5th from 4th while engine is cold | Engine coolant temp. sensor circuit *1 | |
| ECM | ||
| No gear change by shifting into "+" or "-" while the shifting lever is in the S position | Transmission control switch circuit | |
| ECM | ||
| Harsh engagement (N -> D) | Shift solenoid valve (SL1) circuit *1 | |
| ECM | ||
| Harsh engagement (Lock-up) | ECM | |
| Harsh engagement (Any driving position) | ECM | |
| Poor acceleration | Pattern select switch circuit (ECT SNOW switch) | |
| ECM | ||
| No kick-down | ECM | |
| Engine stalls when starting off or stopping | ECM | |
| ECT SNOW does not operate | Pattern select switch circuit (ECT SNOW switch) | |
| ECM | ||
| Malfunction in shifting | Park/neutral position switch circuit *1 | |
| Transmission control switch circuit | ||
| ECM |
Tech Tips
*1: When the circuit on which mark *1 is detective, a DTC may be output.
| Symptom | Suspected Area | See page |
|---|---|---|
| Vehicle does not move in any forward position and in reverse positions | Valve body assembly | |
| U/D brake (B3) | ||
| Torque converter clutch | ||
| Vehicle does not move in R position | Valve body assembly | |
| Reverse clutch (C2) | ||
| 1st and reverse brake (B2) | ||
| No up-shift (1st -> 2nd) | Valve body assembly | |
| 2nd and O/D brake (B1) | ||
| No up-shift (2nd -> 3rd) | Valve body assembly | |
| Direct and O/D clutch (C0) | ||
| No up-shift (3rd -> 4th) | Valve body assembly | |
| 2nd and O/D brake (B1) | ||
| No up-shift (4th -> 5th) | Shift solenoid valve (S4) | |
| Valve body assembly | ||
| U/D clutch (C3) | ||
| No down-shift (5th -> 4th) | Shift solenoid (S4) | |
| Valve body assembly | ||
| No down-shift (4th -> 3rd) | Valve body assembly | |
| No down-shift (3rd -> 2nd) | Valve body assembly | |
| No down-shift (2nd -> 1st) | Valve body assembly | |
| No lock-up or No lock-up off | Shift solenoid valve (DSL) | |
| Valve body assembly | ||
| Torque converter clutch | ||
| Harsh engagement (N -> D) | Shift solenoid valve (SL1) | |
| Valve body assembly | ||
| C1 accumulator | ||
| Forward clutch (C1) | ||
| No.1 one-way clutch (F1) | ||
| U/D one-way clutch (F2) | ||
| Harsh engagement (Lock-up) | Shift solenoid valve (SL2) | |
| Valve body assembly | ||
| Torque converter clutch | ||
| Harsh engagement (N -> R) | Valve body assembly | |
| C2 accumulator | ||
| Reverse clutch (C2) | ||
| 1st and reverse brake (B2) | ||
| Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th) | Shift solenoid valve (SLT) | |
| Valve body assembly | ||
| Harsh engagement (1st -> 2nd) | Valve body assembly | |
| 2nd and O/D brake (B1) | ||
| Harsh engagement (2nd -> 3rd) | Valve body assembly | |
| C0 accumulator | ||
| Direct and O/D clutch (C0) | ||
| Harsh engagement (3rd -> 4th) | Valve body assembly | |
| 2nd and O/D brake (B1) | ||
| Harsh engagement (4th -> 5th) | Valve body assembly | |
| C3 accumulator | ||
| U/D clutch (B3) | ||
| Harsh engagement (5th -> 4th) | Valve body assembly | |
| B3 accumulator | ||
| Slip or shudder (Forward and reverse: After warm-up) | Valve body assembly | |
| Oil strainer | ||
| Direct and O/D clutch (C0) | ||
| Forward clutch (C1) | ||
| U/D clutch (C3) | ||
| 2nd and brake (B1) | ||
| U/D brake (B3) | ||
| No.1 one-way clutch (F1) | ||
| U/D one-way clutch (F2) | ||
| Torque converter clutch | ||
| Slip or shudder (Particular position: Just after engine starts) | Torque converter clutch | |
| Slip or shudder (R position) | Reverse clutch (C2) | |
| 1st and reverse brake (B2) | ||
| Slip or shudder (1st) | Forward clutch (C1) | |
| No.1 one-way clutch (F1) | ||
| U/D one-way clutch (F2) | ||
| Slip or shudder (2nd) | 2nd and O/D brake (B1) | |
| Slip or shudder (3rd) | Direct and O/D clutch (C0) | |
| Slip or shudder (4th) | 2nd and O/D brake (B1) | |
| Slip or shudder (5th) | U/D clutch (C3) | |
| Shift position too high or too low | Shift solenoid valve (SLT) | |
| No engine braking (1st +- 4th: D position) | U/D brake (B3) | |
| No engine braking (1st: L (1) position) | Valve body assembly | |
| 1st and reverse brake (B2) | ||
| No engine braking (2nd: 2 position) | Valve body assembly | |
| 2nd and O/D brake (B1) | ||
| No engine braking (3rd: 3 position) | U/D brake (B3) | |
| No kick-down | Valve body assembly | |
| Poor acceleration (All positions) | Shift solenoid valve (SLT) | |
| Torque converter clutch | ||
| Poor acceleration (5th) | U/D clutch (C3) | |
| U/D planetary gear unit | ||
| Engine stalls when starting off or stopping | Shift solenoid valve (DSL) | |
| Torque converter clutch |