| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Door/Hatch | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000003FSD001X |
| Title: DOOR / HATCH: POWER BACK DOOR SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Back Door Lock Motor Circuit |
DESCRIPTION
The back door lock motor is built into the back door lock. The power back door unit (power back door ECU) controls the back door lock motor to open/close the back door. This ECU applies current to terminals 2 and 1 to operate the motor and close the door. It reverses the direction of the current and operate the motor to open the door.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT BACK DOOR LOCK ASSEMBLY |
(a) Remove the back door lock
.
(b) Set the back door lock to the half-latch position.
(c) Apply battery voltage and check the operation of the door lock motor.
OK:
|
Measurement Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal 1 (DC+) Battery negative (-) → Terminal 2 (DC-) |
Latch turns to over-latch position |
(d) Set the back door lock to the full-latch position.
(e) Apply battery voltage and check the operation of the door lock motor.
OK:
|
Measurement Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal 2 (DC-) Battery negative (-) → Terminal 1 (DC+) |
Latch turns to open-latch position |
|
|
2. |
CHECK HARNESS AND CONNECTOR (LOCK - UNIT) |
(a) Disconnect the S19 door lock connector.
(b) Disconnect the L36 unit connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S19-1 (M+) - L36-2 (DC+) |
Always |
Below 1 Ω |
|
S19-2 (M-) - L36-1 (DC-) |
Always |
Below 1 Ω |
|
S19-1 (M+) - Body ground |
Always |
10 kΩ or higher |
|
S19-2 (M-) - Body ground |
Always |
10 kΩ or higher |
|
|
|