BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1290; Abnormal Zero Point of Steering Angle Sensor; 2019 - 2021 MY RAV4 RAV4 HV [02/2019

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001HG8Z
Model Year Start: 2019	Model: RAV4	Prod Date Range: [02/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1290; Abnormal Zero Point of Steering Angle Sensor; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

C1290

Abnormal Zero Point of Steering Angle Sensor

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) acquires the steering sensor zero point every time the ignition switch is turned to 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 the front wheel alignment or the steering wheel position is adjusted without disconnecting the cable from the negative (-) auxiliary battery terminal, or if 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 sensor zero point malfunction will be canceled by turning the ignition switch off.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	Note
C1290	Abnormal Zero Point of Steering Angle Sensor	751	The steering sensor zero point is judged as an abnormal value.	Yaw rate and acceleration sensor zero point calibration incomplete Poor adjustment of the center position of the steering wheel Poor adjustment of front wheel alignment	-

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here

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

Chassis > ABS/VSC/TRAC > Utility

Tester Display
Test Mode

HINT:

When the stored zero point of the yaw rate and acceleration sensor is cleared, steering 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 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 SENSOR ZERO POINT CALIBRATION

(a) Turn the ignition switch off.

(b) Turn the ignition switch to ON (READY).

(d) Check that the steering wheel is centered correctly while driving straight ahead.

HINT:

If front wheel alignment and steering position are adjusted as a result of the steering wheel being off-center, acquire yaw rate and acceleration sensor zero point again after the adjustments are completed.

OK:

The steering wheel is centered correctly.

ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION

3.	RECONFIRM DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the ignition switch off.

(d) Drive the vehicle at a speed of 35 km/h (22 mph) or more and turn the steering wheel to the right and left.

(e) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1290 is not output.	A
DTC C1290 is output.	B

END

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY