Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H93N
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)): C1AB1; Short to +B in Outer Mirror Indicator(Slave); 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

C1AB1

Short to +B in Outer Mirror Indicator(Slave)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB1

Short to +B in Outer Mirror Indicator(Slave)

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 RH
  • Outer rear view mirror assembly RH
  • Harness or connector
  • Blind spot monitor sensor RH

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 Slave > 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 O58 blind spot monitor sensor RH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O58-4 (OMIR) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE BLIND SPOT MONITOR SENSOR RH

NG

3.

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

(a) Disconnect the IND2 outer mirror RH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O58-4 (OMIR) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER MIRROR RH

NG

4.

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

(a) Disconnect the K10 outer rear view mirror assembly RH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O58-4 (OMIR) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR