Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Open in Outer Mirror Indicator(Master) (C1AB4)

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Open in Outer Mirror Indicator(Master) (C1AB4)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects an open in the outer rear view mirror indicator LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB4

Open in Outer Mirror Indicator(Master)
Both of the following conditions are met:
  • The blind spot monitor system is on
  • The current flowing to the indicator is below a specified value when indicator operation voltage is being sent to the indicator
  • Outer mirror LH
  • Outer rear view mirror assembly LH
  • Wire harness or connector
  • Blind spot monitor sensor LH
  • Outer mirror control ECU assembly 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 (OUTER MIRROR CONTROL ECU ASSEMBLY LH - BLIND SPOT MONITOR SENSOR LH AND BODY GROUND)

(a) Disconnect the X2 blind spot monitor sensor LH connector.

(b) Disconnect the N4 outer mirror control ECU assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

X2-4 (OMIL) - N4-13 (BDSL)

Always

Below 1 Ω

N4-7 (GND) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the z12 outer rear view mirror assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N4-13 (BDSL) - z12-8 (BSM+)

Always

Below 1 Ω

N4-7 (GND) - z12-12 (TRN-)

Always

Below 1 Ω

*a

Component without harness connected

(Outer Mirror Control ECU Assembly LH)
NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

OK

4.

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

z12-8 (BSM+) - IND1-3 (+)

Always

Below 1 Ω

z12-12 (TRN-) - IND1-2 (-)

Always

Below 1 Ω
NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

OK

5.

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

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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