Rear Power Window LH does not Operate with Rear Power Window Switch LH: Wiring Diagram

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

   OK: Remote UP/DOWN functions operate normally. 

NG : Go to step 2 

OK : REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

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

   Multiplex network switch assembly (rear LH): 

   ITEM TESTER DIAGNOSIS CHART
   
   

   Item	Test Details	Diagnostic Note
   P/W UP/DOWN	Power Window UP/DOWN	-

   OK: Rear power window LH operates normally. 

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

NG : Go to step 3 

OK : REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

1. Remove the RR DOOR LH and LH-IG fuses from the cowl side junction block LH.
2. Remove the AM2 fuse from the cowl side junction block RH.
3. Remove the MPX-B and D/C CUT fuses from the engine room No. 1 relay block.
4. Measure the resistance of the fuses.

   Standard resistance: Below 1 Ω 

NG : REPLACE FUSE 

OK : GO TO NEXT STEP 

1. Disconnect the T1 switch connector.
2. Disconnect the P4 motor connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   T1-6 (U) - P4-1 (U)	Below 1 Ω
   T1-1 (D) - P4-2 (D)	Below 1 Ω
   T1-6 (U) or P4-1 (U) - Body ground	10 kΩ or higher
   T1-1 (D) or P4-2 (D) - Body ground	10 kΩ or higher

   Fig 3: Measuring Resistance Of Wire Harness Side Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : GO TO NEXT STEP 

1. Disconnect the T1 switch connector.
2. Disconnect the P2 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   T1-7 (+B) - P2-5 (BDRJ)	Below 1 Ω
   T1-12 (E) - P2-2 (PWE)	Below 1 Ω
   T1-7 (+B) or P2-5 (BDRJ) - Body ground	10 kΩ or higher
   T1-12 (E) or P2-2 (PWE) - Body ground	10 kΩ or higher

   Fig 4: Measuring Resistance Of Wire Harness Side Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : GO TO NEXT STEP 

1. Disconnect the P2 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFICATION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P2-4 (CPUB)- Body ground	Always	10 to 14 V
   P2-6 (BDR)- Body ground	Always	10 to 14 V
   P2-3 (SIG)- Body ground	Engine switch on (IG)	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFICATION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P2-1 (GND)- Body ground	Always	Below 1 Ω

   Fig 5: Measuring Voltage And Resistance Of Wire Harness Side Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : GO TO NEXT STEP 

1. Remove the motor.
2. Apply battery voltage to connector terminals 1 and 2.
   NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2.
3. Check that the motor gear rotates smoothly as follows.

   OK 

   MEASUREMENT CONDITION CHART
   
   

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

   Fig 6: Identifying Motor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH REAR 

OK : GO TO NEXT STEP 

1. Temporarily replace the multiplex network switch assembly (rear LH) with a new or normally functioning one.
2. 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)