Lexus ES: Power Retractable Mirrors do not Operate with Power Retract Mirror Switch

DESCRIPTION

The outer mirror switch assembly sends the retractable outer mirror switch signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) then sends the mirror retract/return signal to each outer mirror control ECU assembly via CAN communication. Based on the signal, each outer mirror control ECU assembly retracts or returns its corresponding outer rear view mirror assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(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 / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Outer Mirror Fold SW	Retractable outer mirror switch signal	OFF or ON	OFF: Retractable outer mirror switch not in retract position ON: Retractable outer mirror switch in retract position	-

Body Electrical > Main Body > Data List

Tester Display
Outer Mirror Fold SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

NG

GO TO STEP 9

OK

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Enter the following menus: Body Electrical / Mirror L or Mirror R / Active Test.

(b) Perform the Active Test according to the display on the Techstream.

Body Electrical > Mirror L > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Mirror Fold/Return	Mirror retract operation	OFF, Return or Fold	Operate with power switch on (IG) and the vehicle stopped. This test activates the Fold / Return. This operation can be confirmed by watching the mirror move in the desired direction.

Body Electrical > Mirror L > Active Test

Tester Display
Mirror Fold/Return

Body Electrical > Mirror R > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Mirror Fold/Return	Mirror retract operation	OFF, Return or Fold	Operate with power switch on (IG) and the vehicle stopped. This test activates the Fold / Return. This operation can be confirmed by watching the mirror move in the desired direction.

Body Electrical > Mirror R > Active Test

Tester Display
Mirror Fold/Return

Result	Proceed to
Outer rear view mirror assemblies operate normally	A
Outer rear view mirror assembly (driver door) does not operate normally	B
Outer rear view mirror assembly (front passenger door) does not operate normally	C

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 6

B

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) (RETRACTABLE MIRROR)

(a) Remove the outer rear view mirror assembly (driver door).

Click here

(b) Inspect the outer rear view mirror assembly (driver door) (retractable mirror).

Click here

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR)

OK

4.	REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR)

(a) Temporarily replace the outer mirror control ECU assembly (driver door) with a new or known good one.

Click here

NEXT

5.	CHECK POWER RETRACT MIRROR FUNCTION

(a) Check the power retract mirror function operates normally.

Click here

OK:

Power retract mirror function operates normally.

OK

END (OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

6.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) (RETRACTABLE MIRROR)

(a) Remove the outer rear view mirror assembly (front passenger door).

Click here

(b) Inspect the outer rear view mirror assembly (front passenger door)(retractable mirror).

Click here

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR)

OK

7.	REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR)

(a) Temporarily replace the outer mirror control ECU assembly (front passenger door) with a new or known good one.

Click here

NEXT

8.	CHECK POWER RETRACT MIRROR FUNCTION

(a) Check the power retract mirror function operates normally.

Click here

OK:

Power retract mirror function operates normally.

OK

END (OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR) WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

9.	INSPECT OUTER MIRROR SWITCH ASSEMBLY

(a) Remove the outer mirror switch assembly.

Click here

(b) Inspect the outer mirror switch assembly.

Click here

NG

REPLACE OUTER MIRROR SWITCH ASSEMBLY

OK

10.	CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G38 main body ECU (multiplex network body ECU).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J16-11 (MF) - G38-16 (RET)	Always	Below 1 Ω
J16-8 (MR) - G38-6 (AMR)	Always	Below 1 Ω
J16-12 (E) - G38-9 (MIRE)	Always	Below 1 Ω
J16-11 (MF) or G38-16 (RET) - Body ground	Always	10 kΩ or higher
J16-8 (MR) or G38-6 (AMR) - Body ground	Always	10 kΩ or higher
J16-12 (E) or G38-9 (MIRE) - Body ground	Always	10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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