Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Short to +B in Outer Mirror Indicator(Slave) (C1AB1)

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
  • Wire harness or connector
  • Blind spot monitor sensor RH
  • Outer mirror control ECU assembly 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 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 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 W2 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

W2-4 (OMIR) - Body ground

Engine 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

W2-4 (OMIR) - Body ground

Engine 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 z13 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

W2-4 (OMIR) - Body ground

Engine switch on (IG)

Below 1 V

OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

NG

5.

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

(a) Disconnect the M4 outer mirror control ECU assembly RH connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

W2-4 (OMIR) - Body ground

Engine switch on (IG)

Below 1 V

OK

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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