AUTOMATIC TRANSMISSION 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 problem symptoms table 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 a 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 stored.
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*2: w/ Snow Mode Switch
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*3: w/ Kick Down Switch
| Symptom | Suspected Area | Link |
|---|---|---|
| No up-shift (1st -> 2nd) | Shift solenoid valve (S1) circuit*1 | |
| ECM | ||
| No up-shift (2nd -> 3rd) | Shift solenoid valve (S2) circuit*1 | |
| ECM | ||
| No up-shift (3rd -> 4th) | Shift solenoid valve (S3) circuit*1 | |
| Engine coolant temp. sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Engine coolant temp. sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| ECM | ||
| No up-shift (4th -> 5th) | Shift solenoid valve (S4) circuit*1 | |
| Shift solenoid valve (SR) circuit*1 | ||
| Shift solenoid valve (SL1) circuit*1 | ||
| Shift solenoid valve (SL2) circuit*1 | ||
| ECM | ||
| No up-shift (5th -> 6th) | Park/neutral position switch assembly circuit*1 | |
| Engine coolant temp. sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Engine coolant temp. sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| Shift solenoid valve (S2) circuit *1 | ||
| ECM | ||
| No down-shift (6th -> 5th) | Park/neutral position switch assembly circuit*1 | |
| Shift solenoid valve (S2) circuit*1 | ||
| ECM | ||
| No down-shift (5th -> 4th) | Shift solenoid valve (S4) circuit*1 | |
| Shift solenoid valve (SR) circuit*1 | ||
| Shift solenoid valve (SL1) circuit *1 | ||
| Shift solenoid valve (SL2) circuit *1 | ||
| ECM | ||
| No down-shift (4th -> 3rd) | Shift solenoid valve (S3) circuit *1 | |
| ECM | ||
| No down-shift (3rd -> 2nd) | Shift solenoid valve (S2) circuit *1 | |
| ECM | ||
| No down-shift (2nd -> 1st) | Shift solenoid valve (S1) circuit *1 | |
| ECM | ||
| No lock-up or No lock-up off | Shift solenoid valve (SLU) circuit *1 | |
| Stop light switch circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Stop light switch circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| ECM | ||
| No lock-up | Shift solenoid valve (SLU) circuit *1 | |
| Engine coolant temp. sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Engine coolant temp. sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| Stop light switch circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Stop light switch circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| Transmission revolution sensor (NT) circuit *1 | ||
| ECM | ||
| No lock-up off | Shift solenoid valve (SLU) circuit *1 | |
| ECM | ||
| Shift point too high or too low | Shift solenoid valve (SLT) circuit *1 | |
| Transmission revolution sensor (NT) circuit *1 | ||
| Transmission revolution sensor (SP2) circuit *1 | ||
| Throttle position sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | ||
| Throttle position sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| Pattern select switch sport mode circuit | ||
| ATF temperature sensor circuit*1 | ||
| ECM | ||
| Up-shift to 4th from 3rd while engine is cold | Engine coolant temp. sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | |
| Engine coolant temp. sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| ECM | ||
| Up-shift to 5th from 4th while engine is cold | Engine coolant temp. sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | |
| Engine coolant temp. sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| ECM | ||
| No gear change by moving shift lever to "+" or "-" from M | Transmission control switch circuit | |
| ECM | ||
| No gear change by operating "+" or "-" shift paddle | Shift paddle switch circuit | |
| ECM | ||
| Harsh engagement (N -> D) | Shift solenoid valve (SLT) circuit*1 | |
| Transmission revolution sensor (NT) circuit*1 | ||
| ECM | ||
| Harsh engagement (Lock-up) | Transmission revolution sensor (NT) circuit*1 | |
| Transmission revolution sensor (SP2) circuit*1 | ||
| Shift solenoid valve (SLU) circuit*1 | ||
| ECM | ||
| Harsh engagement (Any driving position) | Throttle position sensor circuit for 4GR-FSE (w/ Canister Pump Module)*1 | |
| Throttle position sensor circuit for 4GR-FSE (w/o Canister Pump Module)*1 | ||
| Shift solenoid valve (SL1) circuit*1 | ||
| Shift solenoid valve (SL2) circuit*1 | ||
| Shift solenoid valve (SLU) circuit*1 | ||
| Shift solenoid valve (SLT) circuit*1 | ||
| Transmission revolution sensor (NT) circuit*1 | ||
| ECM | ||
| Poor acceleration | Shift solenoid valve (SLT) circuit*1 | |
| Pattern select switch snow mode circuit*2 | ||
| ECM | ||
| No engine brake | ECM | |
| No kick-down | Kick down switch circuit*3 | |
| ECM | ||
| Engine stalls when starting off or stopping | Shift solenoid valve (SLU) circuit*1 | |
| ECM | ||
| SNOW mode does not change | Pattern select switch snow mode circuit*2 | |
| ECM | ||
| Malfunction in shifting | Park/neutral position switch assembly circuit*1 | |
| Transmission control switch circuit | ||
| ECM | ||
| Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th) | Shift solenoid valve (SR) circuit*1 | |
| Slip or shudder (5th -> 6th and 6th -> 5th) | Shift solenoid valve (SR) circuit*1 |
| Symptom | Suspected Area | Link |
|---|---|---|
| Vehicle does not move in any forward position and reverse positions | Transmission control rod | |
| Manual valve | ||
| Parking lock pawl | ||
| Rear planetary gear unit | ||
| Torque converter assembly | ||
| Vehicle does not move in R position | Valve body assembly | |
| Brake No. 4 (B4) | ||
| No up-shift (1st -> 2nd) | Valve body assembly | |
| Brake No. 3 (B3) | ||
| One-way clutch No. 1 (F1) | ||
| One-way clutch No. 2 (F2) | ||
| No up-shift (2nd -> 3rd) | Valve body assembly | |
| Clutch No. 3 (C3) | ||
| No up-shift (3rd -> 4th) | Valve body assembly | |
| Clutch No. 2 (C2) | ||
| No up-shift (4th -> 5th) | Valve body assembly | |
| Brake No. 1 (B1) | ||
| No up-shift (5th -> 6th) | Valve body assembly | |
| Brake No. 2 (B2) | ||
| No down-shift (6th -> 5th) | Valve body assembly | |
| No down-shift (5th -> 4th) | 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 | Valve body assembly | |
| Torque converter assembly | ||
| Harsh engagement (N -> D) | Valve body assembly | |
| C1 accumulator | ||
| Clutch No. 1 (C1) | ||
| One-way clutch No. 3 (F3) | ||
| One-way clutch No. 4 (F4) | ||
| Harsh engagement (Lock-up) | Valve body assembly | |
| Torque converter assembly | ||
| Harsh engagement (N -> R) | Valve body assembly | |
| C3 accumulator | ||
| Clutch No. 3 (C3) | ||
| Brake No. 4 (B4) | ||
| One-way clutch No. 1 (F1) | ||
| Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th -> 6th) | Valve body assembly | |
| Harsh engagement (1st -> 2nd) | Valve body assembly | |
| B3 accumulator | ||
| Brake No. 3 (B3) | ||
| One-way clutch No. 1 (F1) | ||
| One-way clutch No. 2 (F2) | ||
| Harsh engagement (2nd -> 3rd) | Valve body assembly | |
| C3 accumulator | ||
| Clutch No. 3 (C3) | ||
| Harsh engagement (3rd -> 4th) | Valve body assembly | |
| C2 accumulator | ||
| Clutch No. 2 (C2) | ||
| Harsh engagement (4th -> 5th) | Valve body assembly | |
| B1 accumulator | ||
| Brake No. 1 (B1) | ||
| Harsh engagement (5th -> 6th) | Valve body assembly | |
| B2 accumulator | ||
| Brake No. 2 (B2) | ||
| Harsh engagement (6th -> 5th) | Valve body assembly | |
| C3 accumulator | ||
| Clutch No. 3 (C3) | ||
| Slip or shudder (Forward and reverse: After warm-up) | Valve body assembly | |
| Oil strainer | ||
| One-way clutch No. 1 (F1) | ||
| Clutch No. 3 (C3) | ||
| Torque converter assembly | ||
| Slip or shudder (Particular position: Just after engine starts) | Torque converter assembly | |
| Slip or shudder (R position) | Brake No. 4 (B4) | |
| One-way clutch No. 1 (F1) | ||
| Clutch No. 3 (C3) | ||
| Slip or shudder (1st) | Clutch No. 1 (C1) | |
| One-way clutch No. 3 (F3) | ||
| One-way clutch No. 4 (F4) | ||
| Slip or shudder (2nd) | Clutch No. 1 (C1) | |
| Brake No. 3 (B3) | ||
| One-way clutch No. 1 (F1) | ||
| One-way clutch No. 2 (F2) | ||
| One-way clutch No. 4 (F4) | ||
| Slip or shudder (3rd) | Clutch No. 1 (C1) | |
| Clutch No. 3 (C3) | ||
| One-way clutch No. 1 (F1) | ||
| One-way clutch No. 4 (F4) | ||
| Slip or shudder (4th) | Clutch No. 1 (C1) | |
| Clutch No. 2 (C2) | ||
| One-way clutch No. 4 (F4) | ||
| Slip or shudder (5th) | Clutch No. 2 (C2) | |
| Clutch No. 3 (C3) | ||
| Brake No. 1 (B1) | ||
| Slip or shudder (6th) | Clutch No. 2 (C2) | |
| Brake No. 2 (B2) | ||
| No engine braking (1st +- 4th: M position) | Clutch No. 4 (C4) | |
| No engine braking (1st: 1 position) | Valve body assembly | |
| Brake No. 4 (B4) | ||
| No engine braking (2nd: 2 position) | Valve body assembly | |
| Brake No. 2 (B2) | ||
| No engine braking (3rd: 3 position) | Valve body assembly | |
| Brake No. 1 (B1) | ||
| No engine braking (4th: 4 position) | Valve body assembly | |
| 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. 2 (B2) | |
| Clutch No. 2 (C2) | ||
| Front planetary gear unit | ||
| Engine stalls when starting off or stopping | Valve body assembly | |
| Torque converter assembly |