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 No. | Detection Condition | Fail-safe Operation |
|---|---|---|
| C15F014 | Short circuit between variable flow control solenoid valve (vane pump assembly) terminal SOF+ and ground | Assist force is restricted. |
| Short circuit between variable flow control solenoid valve (vane pump assembly) terminal SOF- and ground | Power assist continues as normal. | |
| Short circuit between variable flow control solenoid valve (vane pump assembly) terminals SOF+ and SOF- | Assist force is restricted. | |
| Power steering solenoid valve open circuit | Assist force is restricted. | |
| U010087 | Lost communication with ECM/PCM "A" | The power steering system is limited depending on which ECU has lost communication. For details, refer to Fail-safe Function. |
| U012687 | Lost communication with steering sensor module | |
| U012987 | Lost communication with brake system control module |
FAIL-SAFE FUNCTION
If the power steering ECU assembly cannot receive the steering angle signal, steering sensor 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.
| DTC No. | Fail-Safe Mode | ||
|---|---|---|---|
| U010087 | U012687 | U012987 | |
| X | - | - | Engine speed compensation disabled |
| - | X | - | ·
Vehicle speed assumed to be certain value and control amount fixed ·
Steering angle compensation disabled ·
Steering wheel return compensation disabled |
| - | - | X | Vehicle speed of 40 km/h (25 mph) assumed and each compensation performed |
| X | X | - | ·
Vehicle speed assumed to be certain value, engine speed compensation disabled and control amount fixed ·
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 | ·
Vehicle speed assumed to be certain value and control amount fixed ·
Steering angle compensation disabled ·
Steering wheel return compensation disabled ·
Fluid flow maintained at constant rate |
| X | X | X | ·
Vehicle speed assumed to be certain value, engine speed compensation disabled and control amount fixed ·
Steering angle compensation disabled ·
Steering wheel return compensation disabled ·
Engine speed compensation disabled ·
Fluid flow maintained at constant rate |
X: Malfunction