ENTRY AND START SYSTEM (for Start Function) PROBLEM SYMPTOMS TABLE
Tech Tips
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.
| Symptom | Suspected Area | See page |
|---|---|---|
| Power source mode does not change | AM2 fuse | |
| IGN fuse | ||
| IG2 MAIN fuse | ||
| Integration relay (IG2 relay) (for 1GR-FE) | ||
| Integration relay (IG2 relay) (for 1UR-FE) | ||
| Integration relay (IG2 relay) (for 3UR-FE) | ||
| Integration relay (IG2 relay) (for 1VD-FTV) | ||
| Engine switch (for 1GR-FE) | ||
| Engine switch (for 1UR-FE) | ||
| Engine switch (for 3UR-FE) | ||
| Engine switch (for 1VD-FTV) | ||
| Main body ECU | ||
| Room oscillator does not recognize key | ||
| Harness or connector | ||
| Engine does not start | STOP fuse | |
| Stop light switch | ||
| ST relay (for 1GR-FE) | ||
| ST relay (for 1UR-FE) | ||
| ST relay (for 3UR-FE) | ||
| ST relay (for 1VD-FTV) | ||
| Park/neutral position switch (for A750F) | ||
| Park/neutral position switch (for AB60F) | ||
| Shift lock control ECU (for A750F) | ||
| Shift lock control ECU (for AB60F) | ||
| Steering lock actuator assembly (Steering lock control ECU) | ||
| ID code box (Immobiliser code ECU) | - | |
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU | ||
| Steering lock system | ||
| ECM (for 1GR-FE) | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV w/ DPF) | ||
| ECM (for 1VD-FTV w/o DPF) | ||
| Power source mode does not change | ||
| Harness or connector | ||
| Engine switch indicator circuit | Engine switch (for 1GR-FE) | |
| Engine switch (for 1UR-FE) | ||
| Engine switch (for 3UR-FE) | ||
| Engine switch (for 1VD-FTV) | ||
| Main body ECU | ||
| Harness or connector |