Drivetrain. Yaris. Ncp93, 131
U340E Automatic Transmission Transaxle. Yaris. Ncp93, 131
Automatic Transaxle System (For Hatchback) -- Problem Symptoms Table |
- HINT:
- 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.
- 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.
- 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.
- If the problem still occurs even though there are no malfunctions in any of the circuits, check the ECM and replace it if necessary.
- *1: When the circuit is defective, a DTC may be output.
Refer to the table below when the trouble cause is considered to be electrical. If the trouble still occurs even though there are no abnormalities in any of the other circuits, then check and replace the ECM.
| Symptom | Suspected Area | See page |
| No up-shift (Particular gear, from 1st to 3rd gear, is not up-shifted) | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| No up-shift (From 3rd to 4th) | Shift lock control unit circuit*1 | YARIS_NCP93 RM000000W840S1X.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| No down-shift (From 4th to 3rd) | Shift lock control unit circuit*1 | YARIS_NCP93 RM000000W840S1X.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| No down-shift (Particular gear, from 3rd to 1st gear, is not down-shifted) | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| No lock-up or No lock-up off | Stop light switch circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html |
| Engine coolant temperature sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html | |
| Vehicle speed sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html | |
| Transmission revolution sensor (Speed sensor (NT)) circuit*1 | YARIS_NCP93 RM0000015VR06CX.html | |
| ATF temperature sensor circuit*1 | YARIS_NCP93 RM000000W850JQX.html | |
| Shift solenoid valve S1*1 | YARIS_NCP93 RM000000W8609PX.html | |
| Shift solenoid valve S2*1 | YARIS_NCP93 RM000000W8709IX.html | |
| Shift solenoid valve SLU*1 | YARIS_NCP93 RM000000W890CJX.html | |
| Throttle position sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html | |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Shift point too high or too low | Throttle position sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Up-shift to 2nd while in L position | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| Up-shift to 3rd while in 2 position | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| Up-shift from 3rd to 4th in 3 position | Shift lock control unit circuit*1 | YARIS_NCP93 RM000000W840S1X.html |
| Park/neutral position switch*1 | YARIS_NCP93 RM000000W840S1X.html | |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Up-shift from 3rd to 4th while engine is cold | Engine coolant temperature sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Harsh engagement (From N to D) | Park/neutral position switch*1 | YARIS_NCP93 RM000000W840S1X.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Harsh engagement (From 3rd to 4th) | Shift solenoid valve ST*1 | YARIS_NCP93 RM000000GLW016X.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Harsh engagement (Lock-up) | Shift solenoid valve SLU*1 | YARIS_NCP93 RM000000W890CJX.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Harsh engagement (Any driving position) | Throttle position sensor circuit*1 | YARIS_NCP93 RM000000PDF0EWX.html |
| ECM | YARIS_NCP93 RM000000UZ309WX.html | |
| Poor acceleration | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| No kick-down | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| Engine stalls when starting off or stopping | ECM | YARIS_NCP93 RM000000UZ309WX.html |
| Malfunction in shifting | Park/neutral position switch*1 | YARIS_NCP93 RM000000W840S1X.html |
| Shift lock control unit circuit*1 | YARIS_NCP93 RM000000W840S1X.html | |
| ECM | YARIS_NCP93 RM000000UZ309WX.html |
| Symptom | Suspected Area | See page |
| Vehicle does not move in any forward positions or in R position | Manual valve | YARIS_NCP93 RM00000191K01GX.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| Planetary gear unit | YARIS_NCP93 RM00000192G01RX.html | |
| Forward clutch (C1) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 2 one-way clutch (F2) | YARIS_NCP93 RM00000192G01RX.html | |
| Reverse clutch (C3) | YARIS_NCP93 RM00000192G01RX.html | |
| 1st and reverse brake (B3) | YARIS_NCP93 RM00000192G01RX.html | |
| Vehicle does not move in R position | Manual valve | YARIS_NCP93 RM00000191K01GX.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| Planetary gear unit | YARIS_NCP93 RM00000192G01RX.html | |
| Reverse clutch (C3) | YARIS_NCP93 RM00000192G01RX.html | |
| 1st and reverse brake (B3) | YARIS_NCP93 RM00000192G01RX.html | |
| No up-shift (From 1st to 2nd) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| 2nd brake (B2) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 1 one-way clutch (F1) | YARIS_NCP93 RM00000192G01RX.html | |
| No up-shift (From 2nd to 3rd) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Direct clutch (C2) | YARIS_NCP93 RM00000192G01RX.html | |
| No up-shift (From 3rd to 4th) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| O/D and 2nd brake (B1) | YARIS_NCP93 RM00000192G01RX.html | |
| No down-shift (From 4th to 3rd) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| No down-shift (From 3rd to 2nd) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| No down-shift (From 2nd to 1st) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| No lock-up or No lock-up off | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Torque converter assembly | YARIS_NCP93 RM00000192E037X.html | |
| Harsh engagement (From N to D) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Forward clutch (C1) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 2 one-way clutch (F2) | YARIS_NCP93 RM00000192G01RX.html | |
| Harsh engagement (Lock-up) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Torque converter assembly | YARIS_NCP93 RM00000192E037X.html | |
| Harsh engagement (From N to R) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| C3 accumulator | YARIS_NCP93 RM00000192G01RX.html | |
| Reverse clutch (C3) | YARIS_NCP93 RM00000192G01RX.html | |
| 1st and reverse brake (B3) | YARIS_NCP93 RM00000192G01RX.html | |
| Harsh engagement (From 1st to 2nd) | B2 accumulator | YARIS_NCP93 RM00000192G01RX.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| 2nd brake (B2) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 1 one-way clutch (F1) | YARIS_NCP93 RM00000192G01RX.html | |
| Harsh engagement (From 2nd to 3rd) | C2 accumulator | YARIS_NCP93 RM00000192G01RX.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| Direct clutch (C2) | YARIS_NCP93 RM00000192G01RX.html | |
| Harsh engagement (From 3rd to 4th) | Shift solenoid valve ST | YARIS_NCP93 RM000000GLW016X.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| O/D and 2nd brake (B1) | YARIS_NCP93 RM00000192G01RX.html | |
| Harsh engagement (From 4th to 3rd) | Shift solenoid valve ST | YARIS_NCP93 RM000000GLW016X.html |
| Valve body assembly | YARIS_NCP93 RM00000191K01GX.html | |
| Harsh engagement (D, 2, L position) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Slippage or shuddering (Forward position) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Oil strainer | YARIS_NCP93 RM00000192G01RX.html | |
| Torque converter assembly | YARIS_NCP93 RM00000192E037X.html | |
| Forward clutch (C1) | YARIS_NCP93 RM00000192G01RX.html | |
| Direct clutch (C2) | YARIS_NCP93 RM00000192G01RX.html | |
| O/D and 2nd brake (B1) | YARIS_NCP93 RM00000192G01RX.html | |
| 2nd brake (B2) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 1 one-way clutch (F1) | YARIS_NCP93 RM00000192G01RX.html | |
| No. 2 one-way clutch (F2) | YARIS_NCP93 RM00000192G01RX.html | |
| Slippage or shuddering (R position) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Oil strainer | YARIS_NCP93 RM00000192G01RX.html | |
| Reverse clutch (C3) | YARIS_NCP93 RM00000192G01RX.html | |
| 1st and reverse brake (B3) | YARIS_NCP93 RM00000192G01RX.html | |
| Slippage or shuddering (1st) | No. 2 one-way clutch (F2) | YARIS_NCP93 RM00000192G01RX.html |
| Slippage or shuddering (2nd) | 2nd brake (B2) | YARIS_NCP93 RM00000192G01RX.html |
| No. 1 one-way clutch (F1) | YARIS_NCP93 RM00000192G01RX.html | |
| Slippage or shuddering (3rd) | Direct clutch (C2) | YARIS_NCP93 RM00000192G01RX.html |
| Slippage or shuddering (4th) | O/D and 2nd brake (B1) | YARIS_NCP93 RM00000192G01RX.html |
| No engine braking (1st: L position) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| 1st and reverse brake (B3) | YARIS_NCP93 RM00000192G01RX.html | |
| No engine braking (2nd: 2 position) | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| 2nd and O/D brake (B1) | YARIS_NCP93 RM00000192G01RX.html | |
| No kick-down | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Poor acceleration | Valve body assembly | YARIS_NCP93 RM00000191K01GX.html |
| Torque converter assembly | YARIS_NCP93 RM00000192E037X.html | |
| Engine stalls when starting off or stopping | Torque converter assembly | YARIS_NCP93 RM00000192E037X.html |