Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H93M
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for HV Model (w/o Safe Exit Assist Function)): C1AB0; Short to +B in Outer Mirror Indicator(Master); 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

C1AB0

Short to +B in Outer Mirror Indicator(Master)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB0

Short to +B in Outer Mirror Indicator(Master)

Both of the following conditions are met:

  • The blind spot monitor system is on
  • The blind spot monitor sensor is not sending voltage to the indicator but the indicator receives voltage above a specified level for a specified period of time
  • Outer mirror LH
  • Outer rear view mirror assembly LH
  • 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 power switch off.

(b) Turn the power 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 (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O57-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE BLIND SPOT MONITOR SENSOR LH

NG

3.

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

(a) Disconnect the IND1 outer mirror LH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O57-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER MIRROR LH

NG

4.

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

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O57-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR