Elements of the electronic control system (4-cylinder engines)
1. Electronic control unit; 2. Throttle position sensor; 3. Switch; 4. Switch indicator light; 5. Brake light switch; 6. Solenoid valve N₂ of the shift lever; 7. Solenoid valve N1 of the shift lever; 8. Ignition interlock switch; 9. Shift lever solenoid valve; 10. Vehicle speed sensor; 11. Coolant temperature sensor
Elements of the electronic control system (6-cylinder engines)
1. Electronic control unit of the cruise control system; 2. Electronic control unit; 3. Throttle position sensor; 4. Switch; 5. Switch indicator light; 6. Brake light switch; 7. Vehicle speed sensor; 8. Shift lever solenoid valve; 9. Solenoid valve N1, N₂ of the shift lever; 10. Ignition interlock switch; 11. Shift lever solenoid valve; 12. Clutch speed sensor; 13. Crankshaft speed sensor; 14. Coolant temperature sensor
Location of the solenoid valve connector (4-cylinder engines)
On 4-cylinder engines, the solenoid connector is located at the front of the transmission, just above the ignition interlock switch.
Location of the solenoid valve connector (6-cylinder engines)
On 6-cylinder engines, the solenoid valve connector is located opposite the ignition interlock switch.
The official source is on the portal: ToyotaMan
Checking the electromagnetic valves
1. Solenoid valves N1 and N₂; 2. Compressed air; 3. Battery
1. To test the solenoids, apply battery voltage to the contacts of each valve.
2. If the valves are working properly, you should hear a click.
3. Direct a stream of compressed air into each of the valves, approximately 65 psi. The valves should not leak air.
4. Apply battery voltage to the terminals again and check that the valve opens.
Error codes
The electronic control system is equipped with an automatic fault finding function. The fault code is stored in the system memory and then displayed on the engine status indicator panel.
| Fault code | Cause of malfunction |
| P0500 | The speedometer sensor is faulty (speed sensor N1), damaged wiring or short circuit |
| P0750 | Shift lever solenoid valve A is faulty (n1 shift lever solenoid valve), valve stuck in open or closed position |
| P0753 | Shift lever solenoid valve A is faulty (n1 shift lever solenoid valve), damaged wiring or short circuit |
| P0755 | Shift lever solenoid valve B is faulty (n2 shift lever solenoid valve), valve stuck in open or closed position |
| P0758 | Shift lever solenoid valve B is faulty (n2 shift lever solenoid valve), damaged wiring or short circuit |
| P0770 | The electromagnetic valve of the shift lever E is faulty, the valve is stuck in the open or closed position |
| P0773 | Shift lever solenoid valve E is faulty, wiring is damaged or short circuited |
| R1520 | The brake light switch is faulty, the wiring is damaged or there is a short circuit in the switch circuit |
| R1705 | Clutch speed sensor is faulty, wiring is damaged or there is a short circuit in the sensor circuit |
| R1765 | The shift lever solenoid valve is faulty, the wiring is damaged or there is a short circuit in the valve circuit |
| R1780 | The ignition interlock switch is faulty, the wiring is damaged or there is a short circuit in the switch circuit |