Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - POWER ASSIST SYSTEMS
POWER STEERING SYSTEM (for 1VD-FTV with DPF) - FAIL-SAFE CHART
If a problem occurs in the power steering system, the power steering warning light in the combination meter comes on and power steering assist is stopped, locked at a particular point or decreased simultaneously to protect the system.
| DTC Code | Detection Condition | Fail-safe Operation |
| C15F0 | Short circuit between power steering solenoid valve terminal SOF+ and ground | Assist force is restricted. |
| Short circuit between power steering solenoid valve terminal SOF- and ground | Power assist continues as normal. | |
| Short circuit between power steering solenoid valve terminals SOF+ and SOF- | Assist force is restricted. | |
| Power steering solenoid valve open circuit | Assist force is restricted. | |
| C15F1 | Steering angle sensor circuit malfunction | The power steering system is limited depending on which ECU has lost communication. For details, refer to Fail-safe Function. |
| C15F2 | VGRS system malfunction | |
| C1541 | Vehicle speed signal malfunction | |
| C1544 | Engine speed signal malfunction | |
| U0100 | Lost communication with ECM/PCM "A" | |
| U0126 | Lost communication with steering angle sensor module | |
| U0129 | Lost communication with brake system control module | |
| U0130 | Lost communication with steering effort control module |
| FAIL-SAFE FUNCTION |
If the power steering ECU cannot receive the steering angle signal, VGRS relative angle signal, steering zero point memory, vehicle speed signal or engine speed signal, the power steering warning light in the combination meter illuminates and the vehicle enters fail-safe mode.
| Malfunction Area | Fail-Safe Mode | |||
| Steering Angle Signal / VGRS relative angle signal | Steering Zero Point Memory | Vehicle Speed Signal | Engine Speed Signal | |
| X | - | - | - | V-Q control fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation normal |
| - | X | - | - | V-Q control normal Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation normal |
| - | - | X | - | Vehicle speed of 40 km/h (25 mph) assumed and each compensation performed |
| - | - | - | X | V-Q control normal Steering angle compensation normal Steering wheel return compensation normal Engine speed compensation disabled |
| X | X | - | - | V-Q control fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation normal |
| X | - | X | - | Fluid flow maintained at constant rate |
| X | - | - | X | V-Q control characteristics fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation disabled |
| - | X | X | - | V-Q control fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation normal |
| - | X | - | X | V-Q control normal Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation disabled |
| - | - | X | X | Vehicle speed of 40 km/h (25 mph) assumed and each compensation performed Engine speed compensation disabled |
| - | X | X | X | V-Q control characteristics fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation disabled |
| X | - | X | X | Fluid flow maintained at constant rate |
| X | X | - | X | V-Q control characteristics fixed Steering angle compensation disabled Steering wheel return compensation disabled Engine speed compensation disabled |
| X | X | X | - | Fluid flow maintained at constant rate |
| X | X | X | X | Fluid flow maintained at constant rate |
- HINT:
- X: Malfunction