Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000005VA8000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C1290; Steering
Angle Sensor Zero Point Malfunction; 2016 MY Tacoma [08/2015 - ]
DTC C1290 Steering Angle Sensor Zero Point Malfunction
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor zero point every time the ignition
switch is turned ON and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU
also stores the previous zero point.
If front wheel alignment or steering wheel position is adjusted without disconnecting the negative 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 actuator assembly) detects the difference between the previous zero
point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.
The steering angle sensor zero point malfunction warning will be canceled by turning the ignition switch off.
DTC
NO.
DETECTION ITEM DTC DETECTION CONDITION TROUBLE AREA
C1290
Steering Angle Sensor
Zero Point Malfunction
The steering angle sensor zero point
calibration position vastly differs from
the recorded value.
Yaw rate and acceleration
sensor zero point calibration
incomplete
Poor adjustment of the
centered position of the
steering wheel
Poor adjustment of front
wheel alignment
INSPECTION PROCEDURE
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store
system information .
PROCEDURE
1. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR
(a) Perform zero point calibration of the yaw rate and acceleration sensor .
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
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