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 there is a malfunction in this circuit, a DTC may be stored.
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*2: w/ Shift Paddle Switch
| Symptom | Suspected Area | Link |
|---|---|---|
| No up-shift (1st to 2nd) | Solenoid (SL3) valve circuit*1 | |
| ECM | ||
| No up-shift (2nd to 3rd) | Solenoid (SL4) valve circuit*1 | |
| ECM | ||
| No up-shift (3rd to 4th) | Solenoid (SL2) valve circuit*1 | |
| Engine coolant temperature sensor circuit*1 | ||
| ECM | ||
| No up-shift (4th to 5th) | Solenoid (SL1) valve circuit*1 | |
| Solenoid (SL4) valve circuit*1 | ||
| Engine coolant temperature sensor circuit*1 | ||
| ECM | ||
| No up-shift (5th to 6th) | Engine coolant temperature sensor circuit*1 | |
| Solenoid (SL3) valve circuit*1 | ||
| Solenoid (SL4) valve circuit*1 | ||
| ECM | ||
| No down-shift (6th to 5th) | Solenoid (SL4) valve circuit*1 | |
| ECM | ||
| No down-shift (5th to 4th) | Solenoid (SL1) valve circuit*1 | |
| ECM | ||
| No down-shift (4th to 3rd) | Solenoid (SL2) valve circuit*1 | |
| Solenoid (SL4) valve circuit*1 | ||
| ECM | ||
| No down-shift (3rd to 2nd) | Solenoid (SL4) valve circuit*1 | |
| Solenoid (SL3) valve circuit*1 | ||
| ECM | ||
| No down-shift (2nd to 1st) | Solenoid (SL3) valve circuit*1 | |
| ECM | ||
| No lock-up | Solenoid (SLU) valve circuit*1 | |
| Solenoid (SL) valve circuit*1 | ||
| Engine coolant temperature sensor circuit*1 | ||
| Stop light switch circuit*1 | ||
| Input speed sensor NT circuit*1 | ||
| ECM | ||
| No lock-up off | ECM | |
| Shift point too high or too low | Solenoid (SLT) valve circuit*1 | |
| Input speed sensor NT circuit*1 | ||
| Output speed sensor NC circuit*1 | ||
| Accelerator pedal position sensor circuit*1 | ||
| ATF temperature sensor circuit*1 | ||
| Pattern select switch sport mode circuit | ||
| ECM | ||
| Up-shift (3rd to 4th) while engine is cold | Engine coolant temperature sensor circuit*1 | |
| ECM | ||
| Up-shift (4th to 5th) while engine is cold | Engine coolant temperature sensor circuit*1 | |
| ECM | ||
| No gear change by moving shift lever to "+" or "-" while in M | Transmission control switch circuit | |
| ECM | ||
| No gear change by operating the "+" or "-" shift paddle switch*2 | Shift paddle switch circuit | |
| ECM | ||
| Harsh engagement (N to D) | Solenoid (SL1) valve circuit*1 | |
| ECM | ||
| Harsh engagement (Lock-up) | Input speed sensor NT circuit*1 | |
| Output speed sensor NC circuit*1 | ||
| Solenoid (SLU) valve circuit*1 | ||
| ECM | ||
| Harsh engagement (Any driving position) | Accelerator pedal position sensor circuit*1 | |
| Solenoid (SLT) valve circuit*1 | ||
| Output speed sensor NC circuit*1 | ||
| Input speed sensor NT circuit*1 | ||
| ECM | ||
| Poor acceleration | Solenoid (SLT) valve 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 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). | Solenoid (SL1) valve circuit*1 | |
| Solenoid (SLT) valve circuit*1 | ||
| ECM | ||
| Acceleration is improper when in 4th gear or higher | Solenoid (SL2) valve circuit*1 | |
| Solenoid (SLT) valve 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). | Solenoid (SL2) valve circuit*1 | |
| ECM | ||
| Acceleration is improper when in 6th gear | Solenoid (SL3) valve circuit*1 | |
| ECM | ||
| Acceleration is improper when in 3rd or 5th gear | Solenoid (SL4) valve circuit*1 | |
| Solenoid (SLT) valve 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). | Solenoid (SL4) valve circuit*1 | |
| ECM |
| Symptom | Suspected Area | Link |
|---|---|---|
| Vehicle does not move in any forward position or reverse position | Transmission valve body assembly | |
| Torque converter assembly | ||
| Vehicle does not move with shift lever in R | Transmission valve body assembly | |
| No. 2 brake (B2) | ||
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| No up-shift (1st to 2nd) | Transmission valve body assembly | |
| No. 1 brake (B1) | ||
| Solenoid (SL3) valve*1 | ||
| No up-shift (2nd to 3rd) | Transmission valve body assembly | |
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| No up-shift (3rd to 4th) | Transmission valve body assembly | |
| No. 2 clutch (C2) | ||
| Solenoid (SL2) valve*1 | ||
| No up-shift (4th to 5th) | Transmission valve body assembly | |
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| Solenoid (SL1) valve*1 | ||
| No up-shift (5th to 6th) | Transmission valve body assembly | |
| No. 1 brake (B1) | ||
| Solenoid (SL3) valve*1 | ||
| Solenoid (SL4) valve*1 | ||
| No down-shift (6th to 5th) | No. 3 brake (B3) | |
| Solenoid (SL4) valve*1 | ||
| Transmission valve body assembly | ||
| No down-shift (5th to 4th) | Solenoid (SL1) valve*1 | |
| No. 1 clutch (C1) | ||
| Transmission valve body assembly | ||
| No down-shift (4th to 3rd) | No. 3 brake (B3) | |
| Solenoid (SL4) valve*1 | ||
| Solenoid (SL2) valve*1 | ||
| Transmission valve body assembly | ||
| No down-shift (3rd to 2nd) | No. 1 brake (B1) | |
| Solenoid (SL3) valve*1 | ||
| Solenoid (SL4) valve*1 | ||
| Transmission valve body assembly | ||
| No down-shift (2nd to 1st) | Transmission valve body assembly | |
| Solenoid (SL3) valve*1 | ||
| No lock-up or No lock-up off | Transmission valve body assembly | |
| Torque converter assembly | ||
| Harsh engagement (N to D) | Transmission valve body assembly | |
| C1 accumulator | ||
| No. 1 one-way clutch (F1) | ||
| No. 1 clutch (C1) | ||
| Solenoid (SL1) valve*1 | ||
| Harsh engagement (Lock-up) | Transmission valve body assembly | |
| Torque converter assembly | ||
| Solenoid (SLU) valve*1 | ||
| Harsh engagement (N to R) | Transmission valve body assembly | |
| No. 2 brake (B2) | ||
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| Harsh engagement (1st to 2nd to 3rd to 4th to 5th to 6th) | Transmission valve body assembly | |
| Solenoid (SLT) valve*1 | ||
| Harsh engagement (1st to 2nd) | Transmission valve body assembly | |
| B1 accumulator | ||
| No. 1 brake (B1) | ||
| Solenoid (SL3) valve*1 | ||
| Harsh engagement (2nd to 3rd) | Transmission valve body assembly | |
| B3 accumulator | ||
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| Harsh engagement (3rd to 4th) | Transmission valve body assembly | |
| C2 accumulator | ||
| No. 2 clutch (C2) | ||
| Solenoid (SL2) valve*1 | ||
| Harsh engagement (4th to 5th) | Transmission valve body assembly | |
| B3 accumulator | ||
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| Harsh engagement (5th to 6th) | Transmission valve body assembly | |
| B1 accumulator | ||
| No. 1 brake (B1) | ||
| Solenoid (SL3) valve*1 | ||
| Harsh engagement (6th to 5th) | Transmission valve body assembly | |
| B3 accumulator | ||
| No. 3 brake (B3) | ||
| Solenoid (SL4) valve*1 | ||
| Slip or shudder (Forward and reverse: After warm-up) | Transmission valve body assembly | |
| Oil strainer | ||
| No. 1 brake (B1) | ||
| No. 2 brake (B2) | ||
| No. 3 brake (B3) | ||
| No. 1 one-way clutch (F1) | ||
| No. 1 clutch (C1) | ||
| No. 2 clutch (C2) | ||
| Slip or shudder (Particular position: Just after engine starts) | Torque converter assembly | |
| Slip or shudder (Shift lever in R) | No. 2 brake (B2) | |
| No. 3 brake (B3) | ||
| Slip or shudder (1st) | No. 1 one-way clutch (F1) | |
| No. 1 clutch (C1) | ||
| Slip or shudder (2nd) | No. 1 brake (B1) | |
| No. 1 clutch (C1) | ||
| Slip or shudder (3rd) | No. 3 brake (B3) | |
| No. 1 clutch (C1) | ||
| Slip or shudder (4th) | No. 1 clutch (C1) | |
| No. 2 clutch (C2) | ||
| Slip or shudder (5th) | No. 3 brake (B3) | |
| No. 2 clutch (C2) | ||
| Slip or shudder (6th) | No. 1 brake (B1) | |
| No. 2 clutch (C2) | ||
| No engine braking (1st) | Transmission valve body assembly | |
| No. 2 brake (B2) | ||
| No engine braking (2nd) | Transmission valve body assembly | |
| No. 1 brake (B1) | ||
| No engine braking (3rd) | Transmission valve body assembly | |
| No. 3 brake (B3) | ||
| No engine braking (4th) | Transmission valve body assembly | |
| No. 2 clutch (C2) | ||
| No kick-down | Transmission valve body assembly | |
| Shift point too high or too low | Transmission valve body assembly | |
| Poor acceleration (All positions) | Transmission valve body assembly | |
| Torque converter assembly | ||
| Poor acceleration (6th) | No. 1 brake (B1) | |
| No. 2 clutch (C2) | ||
| Engine stalls when starting off or stopping | Transmission valve body assembly | |
| Torque converter assembly |