Home Vehicle Interior Door Lock BACK DOOR LOCK
Last Modified: 11-27-2007 1.6 G
Service Category: Vehicle Interior Section: Door Lock
Model Year: 2008 Model: LX570 Doc ID: RM000001VYW007X
Title: DOOR LOCK: BACK DOOR LOCK: INSPECTION (2008 LX570)

INSPECTION

1. INSPECT BACK DOOR LOCK ASSEMBLY



(a) Set the back door lock to the full-latch position.

(b) Apply battery voltage to the door motor connector and check the operation of the door lock motor.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → 2 (ACT+)

Battery negative (-) → 1 (ACT-)

Moves to open-latch position

If the result is not as specified, replace the back door lock assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (ACT-) - 3 (+)

Open-latch

Below 1 Ω

1 (ACT-) - 3 (+)

Full-latch

10 kΩ or higher

If the result is not as specified, replace the back door lock assembly.

2. INSPECT BACK DOOR LOCK ASSEMBLY (w/ Power Back Door)


(a) Inspect the closer motor operation.

(1) Set the back door lock assembly to the full-latch position.

(2) Apply battery voltage and check the operation of the door lock motor.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → 2 (ACT+)

Battery negative (-) → 1 (ACT-)

Moves to open-latch position

    If the result is not as specified, replace the back door lock assembly.

(3) Set the back door lock assembly to the half-latch position.

(4) Apply battery voltage and check the operation of the door lock motor.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → 1 (ACT-)

Battery negative (-) → 2 (ACT+)

Moves to over-latch position


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

Standard Resistance:

Half-latch Switch

Tester Connection

Condition

Specified Condition

5 (CLS) - 4 (E)

Over-latch

Below 1 Ω

5 (CLS) - 4 (E)

Full-latch

10 kΩ or higher

5 (CLS) - 4 (E)

Half-latch

10 kΩ or higher

5 (CLS) - 4 (E)

Open-latch

10 kΩ or higher

Back Door Courtesy Switch:

Tester Connection

Condition

Specified Condition

3 (CTY) - 4 (E)

Selector gear is in center position

Below 1 Ω

3 (CTY) - 4 (E)

Selector gear is not in center position

10 kΩ or higher