Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000005VB9000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum 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 (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.
The steering angle sensor zero point malfunction warning is canceled by turning the ignition switch off.
DTC
NO.
DETECTION ITEM DTC DETECTION CONDITION TROUBLE AREA
C1439
Steering Angle
Sensor
Initialization
Incomplete
After the steering angle sensor zero point
calibration is cleared due to, for example,
fluctuations in the power source, the steering
angle zero point 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)
C1445
Vehicle Driven
with Steering
Angle Sensor not
Initialized
Steering angle sensor zero point calibration
cannot be obtained when the vehicle is driven
without a record of steering angle sensor zero
point calibration at a speed of 35 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)
INSPECTION PROCEDURE
NOTICE:
Before proceeding with the inspection, explain to the customer that the output DTC is related to temporary
loss of the steering angle zero point calibration, such as when the power voltage drops when the battery is
removed, and confirm that this condition occurred.
HINT:
W
hen DTC U0073, U0124 or U0126 is output together with DTC C1439 and/or C1445, inspect and repair
the trouble areas indicated by DTC U0073, U0124 or U0126 first
.
When the speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) has trouble,
DTCs for the steering angle sensor (spiral cable with sensor sub-assembly) may be stored even when the
steering angle sensor (spiral cable with sensor sub-assembly) is normal. When DTCs for the speed sensor
cardiagn.com

Leave a Reply

Your email address will not be published. Required fields are marked *