Home › Vehicle Exterior › Door/Hatch › TAIL GATE CLOSER SYSTEM
Last Modified: 11-27-2007 1.6 J
Service Category: Vehicle Exterior Section: Door/Hatch
Model Year: 2008 Model: LX570 Doc ID: RM000003FSO000X
Title: DOOR / HATCH: TAIL GATE CLOSER SYSTEM: WIRING DIAGRAM (2008 LX570)

Tail Gate does not Open with Back Door Remote Control

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (LOWER TAIL GATE LOCK)

(a) Select the Active Test, use the Techstream to generate a control command, and check that the lower tail gate lock operates.

Body No. 4

Tester Display

Test Part

Control Range

Diagnostic Note

Tail Gate Panel Open

Lower tail gate lock

ON or OFF

The back door must be open.

OK:

Lower tail gate lock operates normally.

OK

2.

READ VALUE USING TECHSTREAM (BACK DOOR REMOTE CONTROL)

(a) Check the Data List for proper functioning of the back door remote control.

Body No. 4

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Handle Switch of tail gate panel

Back door remote control signal/ON or OFF

ON: Back door remote control pulled

OFF: Back door remote control free

-

OK:

The display is as specified in the normal condition.

OK

3.

INSPECT LOWER TAIL GATE LOCK ASSEMBLY

(a) for LH:

(1) Remove the lower tail gate lock LH DOOR / HATCH: TAIL GATE: DISASSEMBLY (2008 LX570)+ .

(2) Set the lower tail gate lock LH to the full-latch position.

(3) Apply battery voltage and check the operation of the lower tail gate lock motor LH.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → Terminal 6 (ACT-)

Battery negative (-) → Terminal 5 (ACT+)

Latch turns to open-latch position

(b) for RH:

(1) Remove the lower tail gate lock RH DOOR / HATCH: TAIL GATE: DISASSEMBLY (2008 LX570)+ .

(2) Set the lower tail gate lock RH to the full-latch position.

(3) Apply battery voltage and check the operation of the lower tail gate lock motor RH.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → Terminal 6 (ACT-)

Battery negative (-) → Terminal 5 (ACT+)

Latch turns to open-latch position

Result

Result

Proceed to

OK

A

NG (for LH)

B

NG (for RH)

C
A

4.

CHECK HARNESS AND CONNECTOR (LOCK - ECU)

(a) for LH:

(1) Disconnect the f3 lock connector.

(2) Disconnect the L34 ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f3-5 (ACT+) - L34-3 (DC+)

Always

Below 1 Ω

f3-6 (ACT-) - L34-8 (DC-)

Always

Below 1 Ω

f3-5 (ACT+) - Body ground

Always

10 kΩ or higher

f3-6 (ACT-) - Body ground

Always

10 kΩ or higher

(b) for RH:

(1) Disconnect the f2 lock connector.

(2) Disconnect the L34 ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f2-5 (ACT+) - L34-2 (DC+)

Always

Below 1 Ω

f2-6 (ACT-) - L34-1 (DC-)

Always

Below 1 Ω

f2-5 (ACT+) - Body ground

Always

10 kΩ or higher

f2-6 (ACT-) - Body ground

Always

10 kΩ or higher
OK

5.

INSPECT BACK DOOR REMOTE CONTROL


(a) Remove the back door remote control DOOR / HATCH: TAIL GATE: DISASSEMBLY (2008 LX570)+ .

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - 2

Back door remote control is pulled (on)

Below 1 Ω

1 - 2

Back door remote control is free (off)

10 kΩ or higher
OK

6.

CHECK HARNESS AND CONNECTOR (CONTROL - ECU AND BODY GROUND)


(a) Disconnect the f1 control connector.

(b) Disconnect the L33 ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f1-2 - L33-19 (BDSU)

Always

Below 1 Ω

f1-1 - Body ground

Always

Below 1 Ω

f1-2 - Body ground

Always

10 kΩ or higher
OK