PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for Gasoline Model (w/o Safe Exit Assist Function)): C1AB2; Short to GND in Outer Mirror Indicator(Master); 2019 - 2023 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 11/2022]

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001D0NN
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 11/2022]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for Gasoline Model (w/o Safe Exit Assist Function)): C1AB2; Short to GND in Outer Mirror Indicator(Master); 2019 - 2023 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 11/2022]

DTC

C1AB2

Short to GND in Outer Mirror Indicator(Master)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects a short to ground in the outer rear view mirror indicator LH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AB2	Short to GND in Outer Mirror Indicator(Master)	Both of the following conditions are met: The blind spot monitor system is on The current that is sent from the blind spot monitor sensor to the indicator is above a specified level for a specified period of time	Outer mirror LH Outer rear view mirror assembly LH Wire harness or connector Blind spot monitor sensor LH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

1.

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

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

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

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

(a) Disconnect the O57 blind spot monitor sensor LH connector.

(b) Disconnect the L9 outer rear view mirror assembly LH connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
O57-4 (OMIL) or L9-1 (BSL+) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Disconnect the IND1 outer mirror LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
L9-1 (BSL+) or IND1-2 (+) - Body ground	Always	10 kΩ or higher

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

OK

4.	INSPECT OUTER MIRROR LH

(a) Remove the outer mirror LH.

Click here

(b) Inspect the outer rear view mirror indicator LH on the outer mirror LH.

Click here

OK

REPLACE BLIND SPOT MONITOR SENSOR LH

NG

REPLACE OUTER MIRROR LH