FAIL-SAFE CHART
If a problem occurs in the power steering system, the power steering warning light in the combination meter comes on and the power steering assist is stopped, locked at a particular point or decreased simultaneously to protect the system.
Power Steering System
DTC Code |
Detection Condition |
Fail-safe Operation |
---|---|---|
C15F0 |
Short circuit between power steering solenoid valve terminals SOF+ and ground |
Assist force is restricted. |
Short circuit between power steering solenoid valve terminals 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. |
C1544 |
Engine speed signal malfunction |
|
C1541 |
Vehicle 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 |
1. FAIL-SAFE FUNCTION
If the power steering ECU assembly cannot receive the steering 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 enter a fail-safe mode.
Malfunction Area |
Fail-Safe Mode |
|||
---|---|---|---|---|
Steering Angle Signal |
Steering Zero Point Memory |
Vehicle Speed Signal |
Engine Speed Signal |
|
X |
- |
- |
- |
|
- |
X |
- |
- |
|
- |
- |
X |
- |
Assume vehicle speed 40 km/h (25 mph) and control each compensation |
- |
- |
- |
X |
|
X |
X |
- |
- |
|
X |
- |
X |
- |
Constant fluid volume |
X |
- |
- |
X |
|
- |
X |
X |
- |
|
- |
X |
- |
X |
|
- |
- |
X |
X |
|
- |
X |
X |
X |
|
X |
- |
X |
X |
Constant fluid volume |
X |
X |
- |
X |
|
X |
X |
X |
- |
Constant fluid volume |
X |
X |
X |
X |
Constant fluid volume |
HINT:
X: Malfunction
Motor LH Over Temperature (64,65)
DESCRIPTION
When the side auto step controller ECU assembly detects the overheating in the
system, it stops the operation of the automatic running board.
DTC No.
Detection Condition
Trouble Area
64
...
On-vehicle Inspection
ON-VEHICLE INSPECTION
CAUTION / NOTICE / HINT
NOTICE:
Water or deteriorated brake fluid. Sealed areas or brake fluid may deteriorate
and lead to fluid leaks or decreased efficiency.
PROCEDURE
1. CHECK FLUID LEVEL IN RESERVOIR
(a) Turn the en ...