Toyota Tacoma 2015-2018 Service Manual: Short to +B in Outer Mirror Indicator(Master) (C1AB0)

Toyota Tacoma 2015-2018 Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Short to +B in Outer Mirror Indicator(Master) (C1AB0)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects a +B short in the blind spot monitor indicator LH.

DTC Code	DTC Detection Condition	Trouble Area
C1AB0	With the blind spot monitor main switch assembly (warning canceling switch assembly) on, the voltage applied to the indicator is high for a certain amount of time even though the blind spot monitor sensor is not outputting voltage to the indicator.	Harness or connector Blind spot monitor sensor LH Outer rear view mirror assembly LH Outer rear view mirror LH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor main switch assembly (warning canceling switch assembly) is on.

PROCEDURE

CHECK DTC

(a) Clear the DTCs (See page (b) Recheck for DTCs and check if the same DTC is output again (See page ).

(b) Recheck for DTCs and check if the same DTC is output again (See page OK: ).

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR LH CIRCUIT)

(a) Disconnect the blind spot monitor sensor LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B12-4 (OMIL) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

REPLACE BLIND SPOT MONITOR SENSOR LH

3.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER REAR VIEW MIRROR ASSEMBLY LH)

(a) Disconnect the blind spot monitor sensor LH connector.

(b) Disconnect the O2 outer rear view mirror assembly LH connector.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B12-4 (OMIL) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER REAR VIEW MIRROR LH)

(a) Reconnect the O2 outer rear view mirror assembly LH connector.

(b) Disconnect the blind spot monitor sensor LH connector.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B12-4 (OMIL) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

REPLACE OUTER REAR VIEW MIRROR LH

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

Vehicle Speed Sensor (C1A45)

DESCRIPTION The blind spot monitor sensor receives vehicle speed signals from the skid control ECU (brake actuator assembly) via CAN communication. DTC Code DTC Detection Con ...

Steering Angle Sensor (C1A47)

DESCRIPTION The blind spot monitor sensor receives steering angle signals from the spiral cable with sensor sub-assembly via CAN communication. DTC Code DTC Detection Conditi ...

Other materials:

Removal
REMOVAL CAUTION / NOTICE / HINT CAUTION: Be sure to read Precaution thoroughly before servicing (See page ). If the side airbag was deployed, replace the front seat airbag assembly LH, front seatback cover and front seat frame with adjuster assembly with the necessary part ...

Power Source Circuit
DESCRIPTION This circuit provides power to operate the forward recognition camera. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCEDURE 1. CHECK HARNESS A ...

Control Module Communication Bus OFF (U0073,U0100,U0114,U0123,U0124,U0126)
DESCRIPTION The skid control ECU (master cylinder solenoid) receives the signals from the ECM, steering angle sensor (spiral cable with sensor sub-assembly), 4 wheel drive control ECU*, and yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system. *: ...