Lexus ES: Abnormal Zero Point of Steering Angle Sensor (C1290)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) acquires the steering angle sensor zero point every time the power switch on (READY) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The skid control ECU (brake booster with master cylinder assembly) also stores the previous zero point.
If front wheel alignment or the steering wheel position is adjusted without disconnecting the cable from the negative (-) auxiliary battery terminal, or if the yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU (brake booster with master cylinder assembly) detects the difference between the previous zero point and newly acquired zero point and stores this DTC to indicate a poor adjustment.
Warning operation for the steering angle sensor zero point malfunction will be canceled by turning the power switch off.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C1290 | Abnormal Zero Point of Steering Angle Sensor | 751 | The steering angle sensor zero point calibration position vastly differs from the recorded value. |
| Does not come on | VSC DTC |
PROCEDURE
| 1. | PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor.
Click here .gif)
NOTICE:
Make sure to perform linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization after performing "Reset Memory" as the data stored during linear solenoid valve offset learning, ABS holding solenoid valve learning, brake pedal stroke sensor assembly zero point calibration and system information memorization is cleared.
Chassis > ABS/VSC/TRAC > Utility| Tester Display |
|---|
| Reset Memory |
| Tester Display |
|---|
| Test Mode |
HINT:
- When the stored zero point of the yaw rate and acceleration sensor is cleared, the steering angle sensor zero point will also be cleared.
- If the zero point and output value of the yaw rate and acceleration sensor and the output value of the speed sensors are not normal, steering angle sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.
|
| 2. | CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION |
(a) Turn the power switch off.
(b) Turn the power switch on (READY).
(c) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.
(d) Check that the centered position of the steering wheel is correctly set while driving straight ahead.
OK:
The steering wheel is centered correctly.
HINT:
If front wheel alignment and steering position are adjusted as a result of the steering wheel being off-center, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.
| OK |  | END |
| NG | | ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION |
READ NEXT:
Skid Control ECU Malfunction (C1300)
DESCRIPTION DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note C1300 Skid Control ECU Malfunction 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 10
Open Circuit in Main Relay 1 (C1311,C1312)
DESCRIPTION The main relay supplies power to the switching solenoid and the linear solenoid. The main relay remains on for approximately 2 minutes after the power switch is turned off and the input of
Linear Solenoid Valve Offset Learning undone (C1345,C1368)
DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) stores the individual characteristics of each linear solenoid built into the brake booster with master cylinder assembly.
SEE MORE:
Rear Center Microphone Circuit Component Internal Failure (B1AAA96,B1AAB1C)
DESCRIPTION These DTCs are stored when a malfunction occurs in the No. 3 active noise control microphone system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AAA96 Rear Center Microphone Circuit Component Internal Failure Stereo component equalizer assembly detects
Engine Oil Pressure Too Low (Severe) (P052477,P15F009,P15F077,P15F109,P15F177)
DESCRIPTION Variable oil pump control uses the oil pressure control valve assembly, engine oil temperature sensor, oil pressure sensor and ECM to optimize the oil pressure and oil volume required by each component to reduce friction by monitoring the engine temperature and engine speed. The ECM driv
