Inspection Procedure

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (POWER WINDOW UP / DOWN)

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

Multiplex network master switch

ACTIVE TEST REFERENCE

Item	Test Details
P/W 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.

OK: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

NG: GO TO Next Step

READ VALUE OF INTELLIGENT TESTER (DRIVER SIDE POWER WINDOW SWITCH)

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

Multiplex network master switch

DATA LIST

Item	Measurement Item / Display (Range)	Normal Condition
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

INSPECT FUSE (FR DOOR LH, LH-IG, D/C CUT, MPX-B)
1. Remove the FR DOOR LH, 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

CHECK WIRE HARNESS (MASTER SWITCH - POWER WINDOW MOTOR)

Disconnect the Q13 switch connector.
Disconnect the M11 motor connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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 - Power Window Motor)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO Next Step

CHECK WIRE HARNESS (MASTER SWITCH - FRONT DOOR ECU LH AND BATTERY)

Disconnect the Q13 switch connector.
Disconnect the M9 ECU connector.

Measure the voltage and resistance of the wire harness side connectors.

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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 M9-5 (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 - Front Door ECU LH And Battery)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO Next Step

CHECK WIRE HARNESS (FRONT DOOR ECU LH - BATTERY AND BODY GROUND)

Disconnect the M9 ECU connector.

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

Standard voltage

STANDARD VOLTAGE REFERENCE

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	Power switch ON (IG)	10 to 14 V

Standard resistance

STANDARD RESISTANCE REFERENCE

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)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO Next Step

CHECK WIRE HARNESS (FRONT DOOR ECU LH (SEL1 - SELE))

Disconnect the M10 ECU connector.

Measure the resistance of the wire harness side connector.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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))

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO Next Step

INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH FRONT

Remove the motor.
Apply battery voltage to connector terminals 1 and 2.
NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2.

Check that the motor gear rotates smoothly as follows.

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 5: Inspecting Power Window Regulator Motor Assembly LH Front

NG: REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

OK: GO TO Next Step

CHECK OPERATION OF MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
1. Temporarily replace the multiplex network master switch 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)