Inspection Procedure

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FRONT DOOR LOCK MOTOR)

Select the ACTIVE TEST, use the intelligent tester to generate a condition command, and then check that the door lock motor operates.

Front multiplex network door ECU LH

FRONT MULTIPLEX NETWORK DOOR ECU LH - ACTIVE TEST LIST

Item	Tester Details	Diagnostic Note
DOOR LOCK	Operate door lock motor LOCK/UNLOCK	-

OK:

Door locks/unlocks.

NG: Go to step 2

OK: REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH

INSPECT FRONT DOOR LOCK ASSEMBLY LH

Apply battery voltage to the door lock motor and check operation of the door lock motor.

MEASUREMENT AND SPECIFIED CONDITION CHART

Measurement Condition	Specified Condition
Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 1	Lock
Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 4	Unlock

Fig 1: Identifying Front Door Lock Connector Terminals And LOCK/UNLOCK Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT DOOR LOCK ASSEMBLY LH

OK: Go to next step

READ VALUE OF FRONT DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH)

Check the DATA LIST for proper functioning of the door lock position switch.

Multiplex network master switch assembly

MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - DATA LIST

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
LOCK POS SW	Door lock position switch signal/ON or OFF	ON: Driver side door is unlocked OFF: Driver side door is locked	-

OK:

ON (driver side door is unlocked) appears on screen.

NG: Go to step 4

OK: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)

INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH)

Measure the resistance of the switch.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
7 - 8	Unlock	Below 1 Ω
7 - 8	Lock	10 kΩ or higher

Fig 2: Identifying Front Door Lock Connector Terminals And LOCK/UNLOCK Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT DOOR LOCK ASSEMBLY LH

OK: Go to next step

CHECK WIRE HARNESS (DRIVER DOOR ECU - FRONT DOOR LOCK ASSEMBLY LH)

Disconnect the M10 ECU connector.
Disconnect the M12 door lock connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
M10-1 (A-) - M12-1 (UL)	Below 1 Ω
M10-2 (A+) - M12-4 (L)	Below 1 Ω
M10-13 (LSWE) - M12-7 (E)	Below 1 Ω

Fig 3: Identifying M10 Front Multiplex Network Door ECU LH And M12 Front Door Lock Assembly LH Connector Terminals

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)

Disconnect the M12 door lock connector.
Disconnect the Q13 switch connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
M12-8 (LSSR) - Q13-16 (LSW)	Below 1 Ω

Fig 4: Identifying M12 Front Door Lock Assembly LH And Q13 Multiplex Network Master Switch Assembly Connector Terminals

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH