After the ECM receives a reverse signal from the park/neutral position switch, the ECM sends a reverse signal to the outer mirror control ECU via the CAN and BEAN communication systems. The outer mirror control ECU activates the mirror motor in response to the reverse signal.

M/T models:

After the main body ECU RH (cowl side J/B RH) receives a reverse signal from the back up light switch, the ECU sends a reverse signal to the outer mirror control ECU via the BEAN communication system. The outer mirror control ECU activates the mirror motor in response to the reverse signal.

WIRING DIAGRAM

Power Mirror Control System (W/ Memory) - Reverse Shift-Linked Function Of Power Mirrors Do Not Operate. MIRROR. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK DTCs

Select the DTC check on the intelligent tester to check for communication errors.

Result:
Not output DTC codes A
Output DTC codes (Multiplex communication) B
Output DTC codes (CAN communication) C

B

Go to step 7

NG

3.CHECK VEHICLE TYPE

Result:
M/T A
A/T B

B

Go to step 8

A

4.CHECK WIRE HARNESS (BATTERY POSITIVE VOLTAGE)

Power Mirror Control System (W/ Memory) - Reverse Shift-Linked Function Of Power Mirrors Do Not Operate. MIRROR. Lexus IS250 IS220d GSE20 ALE20

Disconnect the E55 connector.

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

Voltage:
Tester Connection Condition Specified Condition
E55-2 - Body ground Engine switch on (IG) 10 to 14 V

NG

REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR

OK

5.CHECK WIRE HARNESS (BACK UP LIGHT SWITCH ASSEMBLY - COWL SIDE J/B LH)

Disconnect the E55 and LJ connectors.

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

Resistance:
Tester Connection Condition Specified Condition
E55-1 - LJ-23 (BKUP) Always Below 1 Ω
E55-1 - Body ground Always 10 kΩ or higher

NG

REPAIR OR REPLACE WIRE HARNESS

OK

6.INSPECT BACK UP LIGHT SWITCH ASSEMBLY

Disconnect the E55 connector.

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

Resistance:
Tester Connection Condition Specified Condition
E55-1 - E55-2 ON Below 1 Ω
E55-1 - E55-2 OFF 10 kΩ or higher

NG

REPLACE BACK UP LIGHT ASSEMBLY

OK

REPLACE MAIN BODY ECU LH

7.INSPECT OUTER REAR VIEW MIRROR ASSEMBLY

Outer rear view mirror LH:

Disconnect the h1 connector.

Apply battery voltage and check operation of the mirror face.

Standard:

Measurement Condition	Mirror Operation
Battery positive (+) → h1-1 (MV) Battery negative (-) → h1-10 (M+)	Turns upward (A)
Battery positive (+) → h1-10 (M+) Battery negative (-) → h1-1 (MV)	Turns downward (B)
Battery positive (+) → h1-9 (MH) Battery negative (-) → h1-10 (M+)	Turns left (C)
Battery positive (+) → h1-10 (M+) Battery negative (-) → h1-9 (MH)	Turns right (D)

Outer rear view mirror RH:

Disconnect the g1 connector.

Apply battery voltage and check operation of the mirror face.

Standard:

Measurement Condition	Mirror Operation
Battery positive (+) → g1-1 (MV) Battery negative (-) → g1-10 (M+)	Turns upward (A)
Battery positive (+) → g1-10 (M+) Battery negative (-) → g1-1 (MV)	Turns downward (B)
Battery positive (+) → g1-9 (MH) Battery negative (-) → g1-10 (M+)	Turns left (C)
Battery positive (+) → g1-10 (M+) Battery negative (-) → g1-9 (MH)	Turns right (D)

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY

OK

REPLACE OUTER MIRROR CONTROL ECU

8.CHECK WIRE HARNESS (BATTERY POSITIVE VOLTAGE)

Disconnect the E45 connector.

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

Voltage:
Tester Connection Condition Specified Condition
E45-2 - Body ground Engine switch on (IG) 10 to 14 V

NG

REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR

OK

9.CHECK WIRE HARNESS (PARK/NEUTRAL POSITION SWITCH - ECM)

Disconnect the E45 and E4 connectors.

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

Resistance:
Tester Connection Condition Specified Condition
E45-1 - E4-8 Always Below 1 Ω
E45-1 - Body ground Always 10 kΩ or higher

NG

REPAIR OR REPLACE WIRE HARNESS

OK

10.INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

Disconnect the E45 connector.

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

Resistance:
Shift Position Tester Connection Specified Condition
P E45-1 - E45-2 Below 1 Ω
Except P E45-1 - E45-2 10 kΩ or higher

NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

OK

11.REPLACE GATEWAY ECU

Replace the gateway ECU.

NEXT

12.CONFIRM MIRROR OPERATION

NG

REPLACE ECM

OK

END

LEXUS IS250, IS220d / GSE20 ALE20

MIRROR

Lexus IS250 IS220d GSE20 ALE20

POWER MIRROR CONTROL SYSTEM w/ Memory

Not output DTC codes	A
Output DTC codes (Multiplex communication)	B
Output DTC codes (CAN communication)	C

Tester Connection	Condition	Specified Condition
E55-2 - Body ground	Engine switch on (IG)	10 to 14 V

Tester Connection	Condition	Specified Condition
E55-1 - LJ-23 (BKUP)	Always	Below 1 Ω
E55-1 - Body ground	Always	10 kΩ or higher

Tester Connection	Condition	Specified Condition
E55-1 - E55-2	ON	Below 1 Ω
E55-1 - E55-2	OFF	10 kΩ or higher