Inspection Procedure

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

   Multiplex network master switch assembly: 

   DIAGNOSIS NOTE CHART
   
   

   Item	Test Details	Diagnostic Note
   PAN UP/ DOWN	Power Window UP/DOWN	-

   OK: 

   Driver side power window operates normally. 

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

NG: Go to step 2 

OK: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 

1. Check the DATA LIST for proper functioning of the power window master switch.

   Multiplex network master switch assembly 

   DIAGNOSIS NOTE CHART
   
   

   Item	Measurement Item/ Display (Range)	Normal Condition	Diagnostic Note
   P/W UP SW	Driver side power window UP switch signal/ ON or OFF	ON: Driver side power window switch UP operates OFF: Driver side power window switch UP does not operate	-
   P/W DOWN SW	Driver side power window DOWN switch signal/ ON or OFF	ON: Driver side power window switch DOWN operates OFF: Driver side power window switch DOWN does not operate	-

   OK: 

   ON (switch operates) appears on screen. 

NG: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 

OK: Go to next step 

1. Remove the FR DOOR LH, LH-IG fuses from the cowl side junction block LH.
2. Remove the AM1 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 Q13 switch connector.
2. Disconnect the M11 motor connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   Q13-1 (DUP) - M11-2 (U)	Below 1 Ω
   Q13-11 (DDN) - M11-1 (D)	Below 1 Ω
   Q13-1 (DUP) or M11-2 (U) - Body ground	10 kΩ or higher
   Q13-11 (DDN) or M11-1 (D) - Body ground	10 kΩ or higher

Fig 1: Checking Wire Harness (Master Switch Assembly - Front Motor Assembly LH (Driver Side))

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the Q13 switch connector.
2. Disconnect the M9 ECU connector.
3. Measure the voltage and resistance of the wire harness side connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   Q13-9 (CPUB) - Body ground	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   Q13-10 (BDR1) - M9-5 (BDRJ)	Below 1 Ω
   Q13-20 (SIG) - M9-10 (SIGJ)	Below 1 Ω
   Q13-2 (E) - M9-2 (PWE)	Below 1 Ω
   Q13-10 (BDR1) or M9-S (BDRJ) - Body ground	10 kΩ or higher
   Q13-20 (SIG) or M9-10 (SIGJ) - Body ground	10 kΩ or higher
   Q13-2 (E) or M9-2 (PWE) - Body ground	10 kΩ or higher

Fig 2: Checking Wire Harness (Master Switch Assembly - Front Door ECU LH And Battery)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the M9 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   M9-4 (CPUB) - Body ground	Always	10 to 14 V
   M9-6 (BDR) - Body ground	Always	10 to 14 V
   M9-3 (SIG) - Body ground	Engine switch on (IG)	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   M9-1 (GND) - Body ground	Always	Below 1 Ω

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the M10 ECU connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   M10-11 (SEL1) - M10-12 (SELE)	Below 1 Ω
   M10-11 (SEL1) or M10-12 (SELE) - Body ground	10 kΩ or higher

Fig 4: Checking Wire Harness (Front Door ECU LH (Sel1 - Sele))

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 5: Inspecting Power Window Regulator Motor Assembly LH Front

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH 

OK: Go to next step 

1. Temporarily replace the multiplex network master switch assembly with a new or normally functioning one.
2. Check that the power window operates normally.

   OK: 

   Power window operates normally. 

NG: REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH (DRIVER DOOR ECU) 

OK: END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY IS FAULTY)