AUTOMATIC TRANSAXLE SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
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The Matrix Chart is divided into 2 chapters. When troubleshooting, check Chapter 1 first. If instructions are given in Chapter 1 to proceed to 2, proceed as instructed.
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If the instruction "Proceed to next suspected area shown in problem symptoms table" is given in the flowchart for each circuit, proceed to the next suspected area in the table.
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If the problem still occurs even though there are no malfunctions in any of the circuits, check the ECM and replace it if necessary.
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*1: When the circuit is defective, a DTC may be output.
| Symptom | Suspected Area | See page |
|---|---|---|
| No up-shift (1st to 2nd) | Shift solenoid valve (SL3) circuit*1 | |
| ECM | ||
| No up-shift (2nd to 3rd) | Shift solenoid valve (SL4) circuit*1 | |
| ECM | ||
| No up-shift (3rd to 4th) | Shift solenoid valve (SL2) circuit*1 | |
| Engine coolant temp. sensor circuit*1 | ||
| ECM | ||
| No up-shift (4th to 5th) | Shift solenoid valve (SL1) circuit*1 | |
| Shift solenoid valve (SL4) circuit*1 | ||
| Engine coolant temp. sensor circuit*1 | ||
| ECM | ||
| No up-shift (5th to 6th) | Engine coolant temp. sensor circuit*1 | |
| Shift solenoid valve (SL3) circuit*1 | ||
| Shift solenoid valve (SL4) circuit*1 | ||
| ECM | ||
| No down-shift (6th to 5th) | Shift solenoid valve (SL4) circuit*1 | |
| ECM | ||
| No down-shift (5th to 4th) | Shift solenoid valve (SL1) circuit*1 | |
| ECM | ||
| No down-shift (4th to 3rd) | Shift solenoid valve (SL2) circuit*1 | |
| Shift solenoid valve (SL4) circuit*1 | ||
| ECM | ||
| No down-shift (3rd to 2nd) | Shift solenoid valve (SL4) circuit*1 | |
| Shift solenoid valve (SL3) circuit*1 | ||
| ECM | ||
| No down-shift (2nd to 1st) | Shift solenoid valve (SL3) circuit*1 | |
| ECM | ||
| No lock-up | Shift solenoid valve (SLU) circuit*1 | |
| Shift solenoid valve (SL) circuit*1 | ||
| Engine coolant temp. sensor circuit*1 | ||
| Stop light switch circuit*1 | ||
| Speed sensor NT circuit*1 | ||
| ECM | ||
| No lock-up off | ECM | |
| Shift point too high or too low | Shift solenoid valve (SLT) circuit*1 | |
| Speed sensor NT circuit*1 | ||
| Speed sensor NC circuit*1 | ||
| Accelerator pedal position sensor circuit*1 | ||
| ATF temperature sensor circuit*1 | ||
| ECM | ||
| Up-shift from 3rd to 4th while engine is cold | Engine coolant temp. sensor circuit*1 | |
| ECM | ||
| Up-shift from 4th to 5th while engine is cold | Engine coolant temp. sensor circuit*1 | |
| ECM | ||
| No gear change by moving shift lever to "+" or "-" while in S | Transmission control switch circuit | |
| ECM | ||
| Harsh engagement (N to D) | Shift solenoid valve (SL1) circuit*1 | |
| ECM | ||
| Harsh engagement (Lock-up) | Speed sensor NT circuit*1 | |
| Speed sensor NC circuit*1 | ||
| Shift solenoid valve (SLU) circuit*1 | ||
| ECM | ||
| Harsh engagement (Any driving position) | Accelerator pedal position sensor circuit*1 | |
| Shift solenoid valve (SLT) circuit*1 | ||
| Speed sensor NC circuit*1 | ||
| Speed sensor NT circuit*1 | ||
| ECM | ||
| Poor acceleration | Shift solenoid valve (SLT) circuit*1 | |
| ECM | ||
| No engine braking | ECM | |
| No kick-down | ECM | |
| Engine stalls when starting off or stopping | ECM | |
| Shifting malfunction | Park/neutral position switch assembly circuit*1 | |
| Transmission control switch circuit | ||
| ECM | ||
| Shifting malfunction (Vehicle is stuck in 3rd or 5th gear) | ECM power source circuit | |
| ECM | ||
| Initial acceleration or subsequent acceleration is improper. Vehicle is stuck in a gear (1st to 6th). | Shift solenoid valve (SL1) circuit*1 | |
| Shift solenoid valve (SLT) circuit*1 | ||
| ECM | ||
| Acceleration is improper when the gear is 4th or higher. | Shift solenoid valve (SL2) circuit*1 | |
| Shift solenoid valve (SLT) circuit*1 | ||
| ECM | ||
| Initial acceleration or subsequent acceleration is improper. Vehicle does not shift down (from 4th to 3rd). Vehicle is stuck in a gear (1st to 4th). | Shift solenoid valve (SL2) circuit*1 | |
| ECM | ||
| Acceleration is improper when the gear is 6th. | Shift solenoid valve (SL3) circuit*1 | |
| ECM | ||
| Acceleration is improper when the gear is 3rd or 5th. | Shift solenoid valve (SL4) circuit*1 | |
| Shift solenoid valve (SLT) circuit*1 | ||
| ECM | ||
| Initial acceleration or subsequent acceleration is improper. Vehicle does not shift down (from 3rd to 2nd). No up-shift (5th to 6th). | Shift solenoid valve (SL4) circuit*1 | |
| ECM |
Tech Tips
*1: When the circuit is defective, a DTC may be output.
| Symptom | Suspected Area | See page |
|---|---|---|
| Vehicle does not move in any forward or reverse positions. | Valve body assembly | |
| Torque converter assembly | ||
| Vehicle does not move with shift lever in R | Valve body assembly | |
| Brake No. 2 (B2) | ||
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| No up-shift (1st to 2nd) | Valve body assembly | |
| Brake No. 1 (B1) | ||
| Shift solenoid valve (SL3)*1 | ||
| No up-shift (2nd to 3rd) | Valve body assembly | |
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| No up-shift (3rd to 4th) | Valve body assembly | |
| Clutch No. 2 (C2) | ||
| Shift solenoid valve (SL2)*1 | ||
| No up-shift (4th to 5th) | Valve body assembly | |
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| Shift solenoid valve (SL1)*1 | ||
| No up-shift (5th to 6th) | Valve body assembly | |
| Brake No. 1 (B1) | ||
| Shift solenoid valve (SL3)*1 | ||
| Shift solenoid valve (SL4)*1 | ||
| No down-shift (6th to 5th) | Brake No. 3 (B3) | |
| Shift solenoid valve (SL4)*1 | ||
| Valve body assembly | ||
| No down-shift (5th to 4th) | Shift solenoid valve (SL1)*1 | |
| Clutch No. 1 (C1) | ||
| Valve body assembly | ||
| No down-shift (4th to 3rd) | Brake No. 3 (B3) | |
| Shift solenoid valve (SL4)*1 | ||
| Shift solenoid valve (SL2)*1 | ||
| Valve body assembly | ||
| No down-shift (3rd to 2nd) | Brake No. 1 (B1) | |
| Shift solenoid valve (SL3)*1 | ||
| Shift solenoid valve (SL4)*1 | ||
| Valve body assembly | ||
| No down-shift (2nd to 1st) | Valve body assembly | |
| Shift solenoid valve (SL3)*1 | ||
| No lock-up or No lock-up off | Valve body assembly | |
| Torque converter assembly | ||
| Harsh engagement (N to D) | Valve body assembly | |
| C1 accumulator | ||
| One-way clutch No. 1 (F1) | ||
| Clutch No. 1 (C1) | ||
| Shift solenoid valve (SL1)*1 | ||
| Harsh engagement (Lock-up) | Valve body assembly | |
| Torque converter assembly | ||
| Shift solenoid valve (SLU)*1 | ||
| Harsh engagement (N to R) | Valve body assembly | |
| Brake No. 2 (B2) | ||
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| Harsh engagement (1 to 2 to 3 to 4 to 5 to 6) | Valve body assembly | |
| Shift solenoid valve (SLT)*1 | ||
| Harsh engagement (1st to 2nd) | Valve body assembly | |
| B1 accumulator | ||
| Brake No. 1 (B1) | ||
| Shift solenoid valve (SL3)*1 | ||
| Harsh engagement (2nd to 3rd) | Valve body assembly | |
| B3 accumulator | ||
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| Harsh engagement (3rd to 4th) | Valve body assembly | |
| C2 accumulator | ||
| Clutch No. 2 (C2) | ||
| Shift solenoid valve (SL2)*1 | ||
| Harsh engagement (4th to 5th) | Valve body assembly | |
| B3 accumulator | ||
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| Harsh engagement (5th to 6th) | Valve body assembly | |
| B1 accumulator | ||
| Brake No. 1 (B1) | ||
| Shift solenoid valve (SL3)*1 | ||
| Harsh engagement (6th to 5th) | Valve body assembly | |
| B3 accumulator | ||
| Brake No. 3 (B3) | ||
| Shift solenoid valve (SL4)*1 | ||
| Slip or shudder (Forward and reverse: After warm-up) | Valve body assembly | |
| Oil strainer | ||
| Brake No. 1 (B1) | ||
| Brake No. 2 (B2) | ||
| Brake No. 3 (B3) | ||
| One-way clutch No. 1 (F1) | ||
| Clutch No. 1 (C1) | ||
| Clutch No. 2 (C2) | ||
| Slip or shudder (Particular position: just after engine starts) | Torque converter assembly | |
| Slip or shudder (shift lever in R) | Brake No. 2 (B2) | |
| Brake No. 3 (B3) | ||
| Slip or shudder (1st) | One-way clutch No. 1 (F1) | |
| Clutch No. 1 (C1) | ||
| Slip or shudder (2nd) | Brake No. 1 (B1) | |
| Clutch No. 1 (C1) | ||
| Slip or shudder (3rd) | Brake No. 3 (B3) | |
| Clutch No. 1 (C1) | ||
| Slip or shudder (4th) | Clutch No. 1 (C1) | |
| Clutch No. 2 (C2) | ||
| Slip or shudder (5th) | Brake No. 3 (B3) | |
| Clutch No. 2 (C2) | ||
| Slip or shudder (6th) | Brake No. 1 (B1) | |
| Clutch No. 2 (C2) | ||
| No engine braking (1st) | Valve body assembly | |
| Brake No. 2 (B2) | ||
| No engine braking (2nd) | Valve body assembly | |
| Brake No. 1 (B1) | ||
| No engine braking (3rd) | Valve body assembly | |
| Brake No. 3 (B3) | ||
| No engine braking (4th) | Valve body assembly | |
| Clutch No. 2 (C2) | ||
| No kick-down | Valve body assembly | |
| Shift point too high or too low | Valve body assembly | |
| Poor acceleration (All positions) | Valve body assembly | |
| Torque converter assembly | ||
| Poor acceleration (6th) | Brake No. 1 (B1) | |
| Clutch No. 2 (C2) | ||
| Engine stalls when starting off or stopping | Valve body assembly | |
| Torque converter assembly |
Tech Tips
*1: When the circuit is defective, a DTC may be output.