Inspection Procedure

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. 

OK: REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

NG: GO TO Next Step 

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

   Multiplex network master switch (for rear LH) 

   ACTIVE TEST REFERENCE
   
   

   Item	Test Details
   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.

OK: REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY 

NG: GO TO Next Step 

1. Remove the RR DOOR LH and LH-IG fuses from the main body ECU LH.
2. Remove the MPX-B and D/C CUT fuses from the engine room No. 1 relay block.
3. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: GO TO Next Step 

1. Disconnect the S5 switch connector.
2. Disconnect the O9 motor connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S5-6 (U) - O9-1 (U)	Below 1 Ω
   S5-1 (D) - O9-2 (D)	Below 1 Ω
   S5-6 (U) or O9-1 (U) - Body ground	10 kΩ or higher
   S5-1 (D) or O9-2 (D) - Body ground	10 kΩ or higher

Fig 1: Checking Wire Harness (Power Window Switch - Power Window Motor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Disconnect the S5 switch connector.
2. Disconnect the O7 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S5-7 (+B) - O7-5 (BDRJ)	Below 1 Ω
   S5-12 (E) - O7-2 (PWE)	Below 1 Ω
   S5-7 (+B) or O7-5 (BDRJ) - Body ground	10 kΩ or higher
   S5-12 (E) or O7-2 (PWE) - Body ground	10 kΩ or higher

Fig 2: Checking Wire Harness (Power Window Switch - Rear Door ECU LH)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Disconnect the O7 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   STANDARD VOLTAGE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   O7-4 (CPUB) - Body ground	Always	10 to 14 V
   O7-6 (BDR) - Body ground	Always	10 to 14 V
   O7-3 (SIG) - Body ground	Power switch ON (IG)	10 to 14 V

   Standard resistance 

   STANDARD RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   O7-1 (GND) - Body ground	Always	Below 1 Ω

   Fig 3: Checking Wire Harness (Rear Door ECU LH - Battery And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR 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 AND SPECIFIED CONDITION
   
   

   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 4: Inspecting Rear Power Window Regulator Motor Assembly LH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH 

OK: GO TO Next Step 

1. Temporarily replace the multiplex network switch (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)