Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Outer Mirror Indicator (Module "B" Side) Circuit Short to Battery (C1AB412)

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Outer Mirror Indicator (Module "B" Side) Circuit Short to Battery (C1AB412)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB412

Outer Mirror Indicator (Module "B" Side) Circuit Short to Battery

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 indicator LH)
  • Outer rear view mirror assembly LH
  • Harness or connector
  • Blind spot monitor sensor LH (B)

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 ignition switch off.

(b) Turn the ignition switch to ON.

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

Body Electrical > Blind Spot Monitor "B" > 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 S12 blind spot monitor sensor LH (B) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S12-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

OK

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

NG

3.

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

(a) Disconnect the B outer mirror LH (outer rear view mirror indicator LH) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S12-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

OK

REPLACE OUTER MIRROR LH (OUTER REAR VIEW MIRROR INDICATOR LH)

NG

4.

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

(a) Disconnect the L17 outer rear view mirror assembly LH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S12-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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