POWER WINDOW CONTROL SYSTEM > Rear Power Window LH does not Operate with Rear Power Window Switch LH

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DESCRIPTION

  1. If the manual UP/DOWN function does not operate, there may be a malfunction in the multiplex network switch, rear multiplex network door ECU LH, power window regulator motor or wire harness.

WIRING DIAGRAM


B108124E04


B108815E08


INSPECTION PROCEDURE

1.CHECK REMOTE UP/DOWN FUNCTION

  1. Check that the rear power window LH manual UP/DOWN functions on the multiplex network master switch operate normally.

    OK:
    Remote UP/DOWN functions operate normally.



NG
Go to step 2
OK

REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (POWER WINDOW UP/DOWN)

  1. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check the power window.

    Multiplex network switch assembly: 
    Item
    		Test Details
    		Diagnostic Note
    Power Window
    		UP/OFF (OFF)
    		-
    Power Window
    		DOWN/OFF (OFF)
    		-

    OK:
    Rear power window LH operates normally.

    CAUTION:
    Be careful to avoid injuries as this test causes parts to move.



NG
Go to step 3
OK

REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

3.INSPECT FUSE (RR DOOR LH, LH-IG, AM2, D/C CUT, MPX-B)

  1. Remove the RR DOOR LH and LH-IG fuses from the cowl side junction block LH.

  1. Remove the AM2 fuse from the cowl side junction block RH.

  1. Remove the MPX-B and D/C CUT fuses from the engine room No. 1 relay block.

  1. Measure the resistance of the fuses.

    Standard:
    Below 1 Ω



NG
REPLACE FUSE
OK


4.CHECK WIRE HARNESS (SWITCH ASSEMBLY (REAR LH) - REAR MOTOR ASSEMBLY LH)
B108108E22

  1. Disconnect the U1 switch connector.

  1. Disconnect the Q4 motor connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    U1-6 (U) - Q4-1 (U)
    		Below 1 Ω
    U1-1 (D) - Q4-2 (D)
    		Below 1 Ω
    U1-6 (U) or Q4-1 (U) - Body ground
    		10 kΩ or higher
    U1-1 (D) or Q4-2 (D) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK WIRE HARNESS (SWITCH ASSEMBLY (REAR LH) - REAR DOOR LH ECU)
B108112E13

  1. Disconnect the U1 switch connector.

  1. Disconnect the Q2 ECU connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    U1-7 (+B) - Q2-5 (BDRJ)
    		Below 1 Ω
    U1-12 (E) - Q2-2 (PWE)
    		Below 1 Ω
    U1-7 (+B) or Q2-5 (BDRJ) - Body ground
    		10 kΩ or higher
    U1-12 (E) or Q2-2 (PWE) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (REAR DOOR ECU LH - BATTERY AND BODY GROUND)
B108111E18

  1. Disconnect the Q2 ECU connector.

  1. Measure the voltage and resistance of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Q2-4 (CPUB)- Body ground
    		Always
    		10 to 14 V
    Q2-6 (BDR)- Body ground
    		Always
    		10 to 14 V
    Q2-3 (SIG)- Body ground
    		Engine switch on (IG)
    		10 to 14 V

    Standard resistance:
    Tester Connection
    		Specified Condition
    Q2-1 (GND)- Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


7.INSPECT REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH
B108117E05

  1. Remove the motor.

  1. Apply battery voltage to connector terminals 1 and 2.

    NOTICE:
    Do not apply battery voltage to any terminals except terminals 1 and 2.

  1. Check that the motor gear rotates smoothly as follows.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → 1
    Battery negative (-) → 2
    		Motor gear rotates counterclockwise
    Battery positive (+) → 2
    Battery negative (-) → 1
    		Motor gear rotates clockwise



NG
REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH
OK


8.CHECK OPERATION OF MULTIPLEX NETWORK SWITCH ASSEMBLY (REAR LH)

  1. Temporarily replace the multiplex network switch assembly (rear LH) with a new or normally functioning one.

  1. Check that the power window operates normally.

    OK:
    Power window operates normally.



NG
REPLACE REAR MULTIPLEX NETWORK DOOR ECU LH (REAR DOOR LH ECU)
OK

END (MULTIPLEX NETWORK SWITCH ASSEMBLY (REAR LH) IS FAULTY)