POWER DOOR LOCK CONTROL SYSTEM - Front Passenger Side Double Lock Motor Circuit

DESCRIPTION

The front passenger door double lock motor is built into the front passenger door lock assembly.

The double door lock ECU receives front passenger door double door lock set/release signals from the main body ECU RH using multiplex communication.

The double door lock ECU controls the double lock motor to set/release the double door lock. This ECU applies current from terminal ACTS to terminal ACTR to operate the motor to set the lock. It reverses the direction of the current to operate the motor to release the lock.

WIRING DIAGRAM

Power Door Lock Control System - Front Passenger Side Double Lock Motor Circuit. DOOR LOCK. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.INSPECT FRONT DOOR LOCK ASSEMBLY (DOUBLE LOCK MOTOR)

Power Door Lock Control System - Front Passenger Side Double Lock Motor Circuit. DOOR LOCK. Lexus IS250 IS220d GSE20 ALE20

LHD Models:

Remove the front door lock assembly RH.

Apply battery voltage and set the door lock motor to the lock position.

OK:
Measurement Condition Specified Condition
Battery positive (+) →Terminal 2
Battery negative (-) →Terminal 1 Lock

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

Measurement Condition	Specified Condition
Battery positive (+) →Terminal 4 Battery negative (-) →Terminal 3	Double Locking System is set
Battery positive (+) →Terminal 3 Battery negative (-) →Terminal 4	Double Locking System is unset

Check that the doors cannot be unlocked by operating the control cable while the double locking system is set.

OK:
The doors cannot be unlocked.

RHD Models:

Remove the front door lock assembly LH.

Apply battery voltage and set the door lock motor to the lock position.

OK:
Measurement Condition Specified Condition
Battery positive (+) →Terminal 4
Battery negative (-) →Terminal 3 Lock

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

Measurement Condition	Specified Condition
Battery positive (+) →Terminal 2 Battery negative (-) →Terminal 1	Double Locking System is set
Battery positive (+) →Terminal 1 Battery negative (-) →Terminal 2	Double Locking System is unset

Check that the doors cannot be unlocked by operating the control cable while the double locking system is set.

OK:
The doors cannot be unlocked.

REPLACE FRONT DOOR LOCK ASSEMBLY

OK

2.CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - DOUBLE DOOR LOCK ECU)

LHD Models:

Disconnect the front door lock assembly RH connector.

Disconnect the double door lock ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance:

Tester Connection (Symbols)	Condition	Specified Condition
L8-4 (DL) - P34-3 (ACTS)	Always	Below 1 Ω
L8-3 (UNDL) - P34-4 (ACTR)	Always	Below 1 Ω
L8-4 (DL) - Body ground	Always	10 kΩ or higher
L8-3 (UNDL) - Body ground	Always	10 kΩ or higher

RHD Models:

Disconnect the front door lock assembly LH connector.

Disconnect the double door lock ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance:

Tester Connection (Symbols)	Condition	Specified Condition
L8-2 (DL) - P34-3 (ACTS)	Always	Below 1 Ω
L8-1 (UNDL) - P34-4 (ACTR)	Always	Below 1 Ω
L8-2 (DL) - Body ground	Always	10 kΩ or higher
L8-1 (UNDL) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE