Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000003NJL0FIX
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): C1439,C1445;
Steering Angle Sensor Initialization Incomplete; 2016 MY Tacoma [08/2015 - ]
DTC C1439 Steering Angle Sensor Initialization Incomplete
DTC C1445 Vehicle Driven with Steering Angle Sensor not Initialized
DESCRIPTION
The skid control ECU (master cylinder solenoid) acquires steering angle sensor (spiral cable with sensor
sub-assembly) zero point every time the ignition switch is turned to 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.
The steering angle sensor (spiral cable with sensor sub-assembly) zero point malfunction warning will be
cancelled by turning the ignition switch to off.
DTC
CODE
DTC DETECTION CONDITION TROUBLE AREA
C1439
After the steering angle sensor 0 calibration is cleared due to, for
example, fluctuations in the power source, the steering angle 0
calibration cannot be obtained for 0.048 seconds of continuous
driving
Steering angle sensor
(spiral cable with sensor
sub-assembly)
Yaw rate and acceleration
sensor (airbag sensor
assembly)
Skid control ECU (master
cylinder solenoid)
C1445
Steering angle sensor 0 calibration cannot be obtained when the
vehicle is driven without a record of steering angle sensor 0
calibration at a speed of 36 km/h (22 mph) or more for 30
seconds or more without the brake pedal being depressed
Steering angle sensor
(spiral cable with sensor
sub-assembly)
Yaw rate and acceleration
sensor (airbag sensor
assembly)
Skid control ECU (master
cylinder solenoid)
INSPECTION PROCEDURE
NOTICE:
B
efore proceeding with the inspection, explain to the customer that the output DTC is related to temporary
loss of the steering angle zero calibration, such as when the power voltage drops when the battery is
removed, and confirm that this condition occurred.
When replacing the skid control ECU (master cylinder solenoid), perform calibration .
HINT:
cardiagn.com

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