Self-diagnosis of Toyota Harrier automatic transmission
You can perform a self-diagnosis of the Toyota Harrier automatic transmission by following these steps:
Required tools:
* Paperclip or thin wire
Procedure:
1. Turn the ignition key to the “ON” position (do not start the engine).
2. Locate the diagnostic connector under the instrument panel on the driver’s side.
3. Connect the Tc and GND pins on the diagnostic connector with a paper clip or wire.
* Tc: pin number 4
* GND: pin number 13
4. Start the engine.
5. If the automatic transmission is operating normally, the CHECK ENGINE indicator lamp on the instrument panel will flash at a certain interval and number of flashes corresponding to the fault code.
Automatic transmission fault code table:
| Blink Code | Description of the malfunction |
|—|—|
| 1 flash | Shift Solenoid Valve |
| 2 flashes | Shift Position Sensor |
| 3 flashes | Speed sensor |
| 4 flashes | ATF Temperature Sensor or Torque Converter Lockup Control Coil |
| 5 flashes | Pressure Modulation Valve (Pressure Control Solenoid) |
| 6 flashes | Engine speed sensor |
| 7 flashes | Transmission position sensor or angular acceleration sensor |
Clearing fault codes:
To clear automatic transmission fault codes, follow these steps:
1. Stop the engine.
2. Disconnect the paperclip or wire from the diagnostic connector.
3. Wait at least 5 seconds.
4. Connect the paperclip or wire back to the diagnostic connector.
5. Start the engine.
If the CHECK ENGINE indicator light does not flash, the DTCs have been successfully cleared.
Note:
*This self-test procedure is for basic troubleshooting purposes only.
*If you encounter trouble codes, it is recommended that you contact a qualified mechanic for further diagnosis and repair.