Lexus NX: Reverse Shift-linked Function of Power Mirrors does not Operate

Lexus NX Service Manual / Vehicle Exterior / Mirror (ext) / Power Mirror Control System (w/ Memory) / Reverse Shift-linked Function of Power Mirrors does not Operate

DESCRIPTION

Hybrid vehicle control ECU sends the reverse signal to the main body ECU (multiplex network body ECU) via CAN communication. When receiving the reverse signal, the main body ECU (multiplex network body ECU) sends the reverse request signal to each outer mirror control ECU assembly. Each outer mirror control ECU assembly then performs control in response to the reverse signal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

    Click here

HINT:

The reverse shift-linked function will not activate when the mirror select switch is in the neutral position (off).

PROCEDURE

1.

CHECK OUTER REAR VIEW MIRROR ASSEMBLY FUNCTION (MEMORY AND REACTIVATION OPERATION)

(a) Check that the memory and reactivation function operates.

Click here

OK:

Memory and reactivation function operates normally.

NG

GO TO OTHER FLOWCHART (Power Mirror Surface Position is not Memorized)

OK

2.

CHECK FOR DTC (HYBRID CONTROL SYSTEM)

(a) Check for DTCs.

Click here

OK:

DTCs output does not occur.

NG

GO TO HYBRID CONTROL SYSTEM

OK

3.

CHECK SHIFT POSITION INDICATOR FUNCTION

(a) Check that the shift position indicator operates.

Click here

OK:

Shift position indicator operates normally.

NG

GO TO METER / GAUGE SYSTEM

OK

4.

CONFIRM MALFUNCTIONING PARTS

(a) Check the malfunctioning outer rear view mirror assembly.

Click here

Result

Proceed to

Both the left and right outer rear view mirror assembly do not operate

A

Outer rear view mirror assembly LH does not operate

B

Outer rear view mirror assembly RH does not operate

C

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 6

B

5.

CHECK OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Temporarily replace the outer rear view mirror assembly LH with a new or normally functioning one.

Click here

(b) Check that the reverse shift-linked function operates.

Click here

OK:

Reverse shift-linked function operates normally.

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY LH IS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

6.

CHECK OUTER REAR VIEW MIRROR ASSEMBLY RH

(a) Temporarily replace the outer rear view mirror assembly RH with a new or normally functioning one.

Click here

(b) Check that the reverse shift-linked function operates.

Click here

OK:

Reverse shift-linked function operates normally.

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY RH IS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH

READ NEXT:

 Power Mirror Control System (w/o Memory)

 Parts Location

PARTS LOCATION ILLUSTRATION *1 OUTER REAR VIEW MIRROR ASSEMBLY LH *2 OUTER REAR VIEW MIRROR ASSEMBLY RH *3 OUTER MIRROR LH *4 OUTER MIRROR RH *5 NO. 2 ENGINE ROOM RELAY BLOCK

 System Diagram

SYSTEM DIAGRAM Power Mirror Control System Mirror Heater System

SEE MORE:

 Adjustment (one Time Recognition)

ADJUSTMENT (ONE TIME RECOGNITION) CAUTION / NOTICE / HINT NOTICE: Make sure to read Before Starting Adjustment before proceeding with work. Click here PROCEDURE 1. SECURE APPROPRIATE AREA FOR PERFORMING LEARNING (a) Park the vehicle on a level surface. HINT: Make sure that the target recogni

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DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes. Body Electrical > Road Sign Assist > Trouble Codes (e) Check for DTCs (Test Fail

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