Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

When DTC U0073, U0123, U0124 and/or U0126 is output together with DTC C1439 and/or C1445, inspect
and repair the trouble areas indicated by DTC U0073, U0123, U0124 and/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
or yaw rate and acceleration sensor (airbag sensor assembly) are output together with other DTCs for the
steering angle sensor (spiral cable with sensor sub-assembly), inspect and repair the speed sensor and
yaw rate and acceleration sensor (airbag sensor assembly) first, and then inspect and repair the steering
angle sensor (spiral cable with sensor sub-assembly).
PROCEDURE
1. CHECK DTC
(a) Clear the DTCs .
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON again and check that no CAN communication system DTC is output
.
(d) Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left,
and then check that no speed sensor and yaw rate and acceleration sensor (airbag sensor assembly)
DTCs are output .
Result
RESULT PROCEED TO
DTC is output
C1439 and/or C1445 A
Relating to CAN communication system B
Relating to speed sensor or yaw rate and acceleration sensor C
DTC is not output D
HINT:
I
f there is a malfunction in the speed sensor or the yaw rate and acceleration sensor (airbag sensor
assembly), an abnormal value may be output although the steering angle sensor (spiral cable with sensor
sub-assembly) is normal.
If the speed sensor and the yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output
simultaneously, repair the sensors and inspect the steering angle sensor (spiral cable with sensor
sub-assembly).
If DTC C1439 and/or C1445 is not output again, the DTC may have been stored due to a temporary loss of
the steering angle zero calibration, such as when the power voltage drops.
B
GO TO COMMUNICATION SYSTEM (HOW TO
PROCEED WITH TROUBLESHOOTING)
C
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
D
USE SIMULATION METHOD TO CHECK
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