Toyota Tacoma (2015-2018) Service Manual: Open in Outer Mirror Indicator(Master) (C1AB4)

Toyota Tacoma (2015-2018) Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Open in Outer Mirror Indicator(Master) (C1AB4)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects an open in the blind spot monitor indicator LH.

DTC Code	DTC Detection Condition	Trouble Area
C1AB4	With the blind spot monitor main switch assembly (warning canceling switch assembly) on, the current flowing to the indicator is below a specified value when indicator operation voltage is sent to the indicator.	Harness or connector Outer rear view mirror LH Outer rear view mirror assembly LH Blind spot monitor sensor 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 ASSEMBLY LH - BLIND SPOT MONITOR SENSOR LH AND BODY GROUND)

(a) Disconnect the B12 blind spot monitor sensor LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
B12-4 (OMIL) - O2-1 (BSL+)	Always	Below 1 Ω
O2-8 - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Remove the outer rear view mirror assembly LH (See page (b) Remove the outer rear view mirror LH (See page ).

(b) Remove the outer rear view mirror LH (See page (c) Measure the resistance according to the value(s) in the table below. ).

Standard Resistance:

Tester Connection	Condition	Specified Condition
O2-1 (BSL+) - A-2 (+)	Always	Below 1 Ω
O2-8 - A-1 (-)	Always	Below 1 Ω

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

4.	CHECK OUTER REAR VIEW MIRROR LH

(a) Replace the outer rear view mirror LH with a new or normally functioning one (See page (b) Clear the DTCs (See page ). ).

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

OK:

No DTCs are output.

END (OUTER REAR VIEW MIRROR LH WAS DEFECTIVE)

REPLACE BLIND SPOT MONITOR SENSOR LH

Blind Spot Monitor Master Module (C1AB6)

DESCRIPTION This DTC is stored when the blind spot monitor sensor LH detects an internal malfunction. DTC Code DTC Detection Condition Trouble Area ...

Short to GND in Outer Mirror Indicator(Master) (C1AB2)

DESCRIPTION This DTC is stored when the blind spot monitor sensor LH detects a ground short in the blind spot monitor indicator LH. DTC Code DTC Detection Condition ...

Other materials:

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Problem Symptoms Table
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