AUTOMATIC TRANSMISSION SYSTEM PROBLEM SYMPTOMS TABLE
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.
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 on matrix chart" is given in the flow chart of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.
| Symptom | Suspected Area | See page |
|---|---|---|
| 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 *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 circuit *1 | |
| Engine coolant temp. sensor circuit *1 | ||
| Shift solenoid valve (S2) circuit *1 | ||
| ECM | ||
| No down-shift (6th -> 5th) | Park/neutral position switch 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 *1 | ||
| ECM | ||
| No lock-up | Shift solenoid valve (SLU) circuit *1 | |
| Engine coolant temp. sensor circuit *1 | ||
| Stop light switch circuit *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 *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 *1 | |
| ECM | ||
| Up-shift to 5th from 4th while engine is cold | Engine coolant temp. sensor circuit *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 *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 | ECM | |
| Kick down switch circuit *3 | ||
| Engine stalls when starting off or stopping | Shift solenoid valve (SLU) circuit *1 | |
| ECM | ||
| ECT SNOW does not operate *2 | Shift solenoid valve (SLT) circuit *1 | |
| Pattern select switch snow mode circuit | ||
| ECM | ||
| Malfunction in shifting | Park/neutral position switch 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 |
-
*1: When the circuit is detective, a DTC may be output.
-
*2: w/ SNOW switch
-
*3: w/ Kick down switch assembly
| Symptom | Suspected Area | See page |
|---|---|---|
| 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 |