Lexus NX manuals

Lexus NX: Short to +B in Outer Mirror Indicator(Master) (C1AB0)

Lexus NX Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Short to +B in Outer Mirror Indicator(Master) (C1AB0)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C1AB0

Short to +B in Outer Mirror Indicator(Master)
Both of the following conditions are met:
  • The blind spot monitor main switch (combination switch assembly) 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 (w/o Retract Mirror)
  • Harness or connector
  • Outer mirror retractor LH (w/ Retract Mirror)
  • Blind spot monitor sensor LH
  • Outer mirror control ECU assembly LH

-

WIRING DIAGRAM

w/o Retract Mirror w/ Retract Mirror

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor main switch (combination switch assembly) is on.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Body Electrical > Blind Spot Monitor Master > Clear DTCs

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

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

DTC C1AB0 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER MIRROR LH)

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

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

V1-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE BLIND SPOT MONITOR SENSOR LH

NG

3.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER REAR VIEW MIRROR ASSEMBLY LH)

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

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)

(b) Disconnect the IND1 outer mirror LH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

V1-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER MIRROR LH

NG

4.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER MIRROR CONTROL ECU ASSEMBLY LH)

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

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)

(b) Disconnect the m5 outer mirror control ECU assembly LH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

V1-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V

Result

Proceed to

OK (w/o Retract Mirror)

A

OK (w/ Retract Mirror)

B

NG

C
A

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

B

REPLACE OUTER MIRROR RETRACTOR LH

C

5.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER MIRROR CONTROL ECU ASSEMBLY LH)

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

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)

(b) Disconnect the M5 outer mirror control ECU assembly LH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

V1-4 (OMIL) - Body ground

Power switch on (IG)

Below 1 V
OK

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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SEE MORE:

 Parts Location

PARTS LOCATION ILLUSTRATION *A w/o Navigation System *B w/ Navigation System *1 FRONT NO. 1 SPEAKER ASSEMBLY RH *2 FRONT NO. 2 SPEAKER ASSEMBLY RH *3 TELEPHONE MICROPHONE ASSEMBLY *4 MAP LIGHT ASSEMBLY - MANUAL (SOS) SWITCH *5 NO. 2 ENGINE ROOM RELAY BLOCK - DCM F

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Lighting System (for Triple Beam Headlight) DTC No. Detection Item Link B1244 Light Sensor Circuit Malfunction B2414 Steering Position Sensor Malfunction B242C Right Headlight ECU Malfunction B242D Left Headlight ECU Malfunc

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