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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: RM000002NOP007X
Title: MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: SYSTEM DESCRIPTION (2008 LX570)

Reverse Shift-linked Function of Power Mirrors does not Operate

SYSTEM DESCRIPTION

When the reverse signal is sent from the ECM through the CAN communication line to the outer mirror control ECU, the outer mirror control ECU activates the outer rear view mirror LH and RH reverse shift-linked function.

HINT:

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

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.

CHECK OPERATION OF SHIFT INDICATOR

(a) Check that the shift indicator of the combination meter operates normally.

OK:

Shift indicator of combination meter operates normally.

OK

3.

READ VALUE USING TECHSTREAM (MIRROR POSITION SENSOR)

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

Mirror

Tester Display

Measurement Item/Display

Normal Condition

Diagnostic Note

RH Mir Position Sensor V

RH side mirror vertical sensor voltage / MIN: 0 V, MAX: 5 V

Within range from 0 to 5 V

-

LH Mir Position Sensor V

LH side mirror vertical sensor voltage / MIN: 0 V, MAX: 5 V

Within range from 0 to 5 V

-

OK:

When mirror control switch is operated to turn mirror upward or downward, voltage changes within range shown in above chart.

Result

Result

Proceed to

LH side mirror does not operate normally

A

RH side mirror does not operate normally

B

Mirror operates normally

C
A

4.

CHECK OUTER MIRROR CONTROL ECU (POWER SOURCE FOR MIRROR POSITION SENSOR)


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

I18-2 (LVC) - I18-3 (LE1)

Engine switch on (IG)

4.7 to 5.5 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I18-3 (LE1) - Body ground

Always

Below 1 Ω
OK

5.

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

(a) Disconnect the I18 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

I18-2 (LVC) - I15-8 (VC)

Always

Below 1 Ω

I18-3 (LE1) - I15-17 (E1)

I18-4 (VSR) - I15-18 (VSRL)

I15-8 (VC) - Body ground

Always

10 kΩ or higher

I15-17 (E1) - Body ground

I15-18 (VSRL) - Body ground
OK

6.

CHECK OUTER MIRROR CONTROL ECU (POWER SOURCE FOR MIRROR POSITION SENSOR)


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

I18-22 (RVC) - I18-23 (RE1)

Engine switch on (IG)

4.7 to 5.5 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I18-23 (RE1) - Body ground

Always

Below 1 Ω
OK

7.

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

(a) Disconnect the I18 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

I18-22 (RVC) - I7-8 (VC)

Always

Below 1 Ω

I18-23 (RE1) - I7-17 (E1)

I18-24 (VSRR) - I7-18 (VSSR)

I7-8 (VC) - Body ground

Always

10 kΩ or higher

I7-17 (E1) - Body ground

I7-18 (VSSR) - Body ground
OK