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Last Modified: 11-27-2007 1.6 J
Service Category: Vehicle Exterior Section: Mirror (ext)
Model Year: 2008 Model: LX570 Doc ID: RM000002Y46004X
Title: MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: SYSTEM DESCRIPTION (2008 LX570)

Power Retractable Mirrors do not Operate with Power Retract Mirror Switch

SYSTEM DESCRIPTION

This circuit detects the conditions of the mirror retract switch.

The outer mirror switch sends information about the operating condition of the mirror retract switch (switch input signals) through the CAN communication line. Then the switch input signals are sent to the outer mirror control ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK DTC

(a) Use the Techstream to check if the CAN communication system is functioning normally NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM (2008 LX570) .

Result

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B
A

2.

READ VALUE USING TECHSTREAM (MIRROR RETRACT SWITCH)

(a) Check the Data List for proper functioning of the mirror retract switch MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: DATA LIST / ACTIVE TEST (2008 LX570) .

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Outer Mirror Fold SW

Mirror retract switch signal (fold) / ON or OFF

ON: Switch in fold position

OFF: Switch not in fold position

-

Auto Mirror SW

Mirror retract switch signal (AUTO) / ON or OFF

ON: Switch in AUTO position

OFF: Switch not in AUTO position

-

OK:

On the Techstream screen, each item changes between ON and OFF according to above chart.

OK

3.

PERFORM ACTIVE TEST USING TECHSTREAM (MIRROR RETRACT FUNCTION)

(a) Select the Active Test, use the Techstream to generate a control command, and then check the power mirror control function MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: DATA LIST / ACTIVE TEST (2008 LX570) .

Mirror

Tester Display

Test Part

Control Range

Diagnostic Note

Mirror Fold

Mirror retract operation

ON / OFF

-

Mirror Return

Mirror retract operation

ON / OFF

-

Result

Result

Proceed to

Outer rear view mirror operates normally

A

Outer rear view mirror LH does not operate normally

B

Outer rear view mirror RH does not operate normally

C
A

4.

INSPECT OUTER MIRROR SWITCH ASSEMBLY (MIRROR RETRACT SWITCH)

(a) Remove the outer mirror switch MIRROR (EXT): OUTER MIRROR SWITCH: REMOVAL (2008 LX570) .

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

5 (E) - 1 (MR)

Mirror retract switch in fold position

Below 1 Ω

Mirror retract switch not in fold position

10 kΩ or higher

5 (E) - 2 (MAT)

Mirror retract switch in AUTO position

Below 1 Ω

Mirror retract switch not in AUTO position

10 kΩ or higher
OK

5.

CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the E2 and E4 ECU connectors.

(b) Disconnect the E95 switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E2-6 (RET) - E95-1 (MR)

Always

Below 1 Ω

E95-5 (E) - Body ground

E4-8 (AMR) - E95-2 (MAT)

E95-1 (MR) - Body ground

Always

10 kΩ or higher

E95-2 (MAT) - Body ground
OK

6.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Remove the mirror LH MIRROR (EXT): OUTER REAR VIEW MIRROR: REMOVAL (2008 LX570) .

(b) For each mirror position: Disconnect the battery, set the mirror position by hand, connect the battery, and check the retractable mirror movement.

NOTICE:

  • Disconnect and reconnect the battery once between each mirror position check.
  • The mirror position cannot be changed manually when the battery is connected. To change the mirror position manually, the battery must be disconnected first.

OK:

Measurement Condition

Mirror Position

Specified Condition

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Forward position (A)

Moves from (A) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Forward position (A)

Does not move

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Position between forward position (A) and driving position (C)

Moves from (B) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Position between forward position (A) and driving position (C)

Moves from (B) to forward position (A)

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Driving position (C)

Moves from (C) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Driving position (C)

Does not move

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Position between driving position (C) and retracted position (E)

Moves from (D) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Position between driving position (C) and retracted position (E)

Moves from (D) to driving position (C)

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Retracted position (E)

Does not move

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Retracted position (E)

Moves from (E) to driving position (C)
OK

7.

CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR LH - OUTER MIRROR CONTROL ECU)

(a) Disconnect the I17 ECU connector.

(b) Disconnect the I15 mirror connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I17-1 (RL) - I15-15 (MR)

Always

Below 1 Ω

I17-2 (FL) - I15-16 (MF)

I15-15 (MR) - Body ground

Always

10 kΩ or higher

I15-16 (MF) - Body ground
OK

8.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

(a) Remove the mirror RH MIRROR (EXT): OUTER REAR VIEW MIRROR: REMOVAL (2008 LX570) .

(b) For each mirror position: Disconnect the battery, set the mirror position by hand, connect the battery, and check the retractable mirror movement.

NOTICE:

  • Disconnect and reconnect the battery once between each mirror position check.
  • The mirror position cannot be changed manually when the battery is connected. To change the mirror position manually, the battery must be disconnected first.

OK:

Measurement Condition

Mirror Position

Specified Condition

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Forward position (A)

Moves from (A) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Forward position (A)

Does not move

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Position between forward position (A) and driving position (C)

Moves from (B) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Position between forward position (A) and driving position (C)

Moves from (B) to forward position (A)

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Driving position (C)

Moves from (C) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Driving position (C)

Does not move

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Position between driving position (C) and retracted position (E)

Moves from (D) to retracted position (E)

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Position between driving position (C) and retracted position (E)

Moves from (D) to driving position (C)

Battery positive (+) → Terminal 15 (MR)

Battery negative (-) → Terminal 16 (MF)

Retracted position (E)

Does not move

Battery negative (-) → Terminal 15 (MR)

Battery positive (+) → Terminal 16 (MF)

Retracted position (E)

Moves from (E) to driving position (C)
OK

9.

CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR RH - OUTER MIRROR CONTROL ECU)

(a) Disconnect the I17 ECU connector.

(b) Disconnect the I7 mirror connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I17-5 (RR) - I7-15 (MR)

Always

Below 1 Ω

I17-6 (FR) - I7-16 (MF)

I7-15 (MR) - Body ground

Always

10 kΩ or higher

I7-16 (MF) - Body ground
OK