| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Door Lock | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000000TO5015X |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: DESCRIPTION (2008 LX570) | ||
|
All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder |
DESCRIPTION
The main body ECU receives switch signals from the multiplex network master switch, and driver side door key cylinder switch signals from the front door lock LH. The main body ECU activates the door lock motor on each door according to these signals.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK DOOR LOCK OPERATION |
(a) Check the door lock operation.
Result
|
Result |
Proceed to |
|---|---|
|
All doors cannot be locked through multiplex network master switch and driver side door key cylinder |
A |
|
All doors cannot be locked through multiplex network master switch |
B |
|
All doors cannot be locked through driver side door key cylinder |
C |
|
|
2. |
INSPECT FUSE (DOOR NO. 1, DOOR NO. 2) |
(a) Remove the DOOR NO. 1 fuse from the main body ECU.
(b) Remove the DOOR NO. 2 fuse from the engine room No. 1 relay block.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DOOR NO. 1 fuse |
Always |
Below 1 Ω |
|
DOOR NO. 2 fuse |
Always |
Below 1 Ω |
|
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the 2A, 2B, 2D and E3 ECU connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage :
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2A-1 (ALTB) - Body ground |
Always |
11 to 14 V |
|
2B-20 (BATB) - Body ground |
Always |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2D-62 (GND2) - Body ground |
Always |
Below 1 Ω |
|
E3-1 (GND3) - Body ground |
Always |
Below 1 Ω |
|
|
4. |
CHECK MASTER SWITCH ASSEMBLY (OPERATION) |
(a) Replace the multiplex network master switch with a normally functioning one
.
(b) Check that all doors can be locked and unlocked by using the master switch.
OK:
All doors can be locked and unlocked with master switch.
|
|
5. |
READ VALUE USING TECHSTREAM (DOOR KEY LINKED LOCK AND UNLOCK SWITCH) |
(a) Use the Data List to check if the door key linked lock and unlock switches are functioning properly.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Door Key SW-Lock |
Door key linked lock switch signal / ON or OFF |
ON: Driver side door key cylinder turned to lock position OFF: Driver side door key cylinder not turned |
- |
|
D Door Key SW-UL |
Door key linked unlock switch signal / ON or OFF |
ON: Driver side door key cylinder turned to unlock position OFF: Driver side door key cylinder not turned |
- |
OK:
On the Techstream screen, each item changes between ON and OFF according to above chart.
|
|
6. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK LH - MAIN BODY ECU AND BODY GROUND) |
(a) Disconnect the E1 and 2D ECU connectors.
(b) Disconnect the I14 door lock connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I14-10 (UL) - E1-10 (UL3) |
Always |
Below 1 Ω |
|
I14-9 (L) - 2D-53 (L2) |
Always |
Below 1 Ω |
|
I14-7 (E) - Body ground |
Always |
Below 1 Ω |
|
I14-10 (UL) - Body ground |
Always |
10 kΩ or higher |
|
I14-9 (L) - Body ground |
Always |
10 kΩ or higher |
|
|
7. |
INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR KEY LINKED LOCK AND UNLOCK SWITCH) |
(a) Remove the front door lock LH
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
9 (L) - 7 (E) |
Lock |
Below 1 Ω |
|
9 (L) - 7 (E) |
Off |
10 kΩ or higher |
|
10 (UL) - 7 (E) |
Unlock |
Below 1 Ω |
|
10 (UL) - 7 (E) |
Off |
10 kΩ or higher |
|
|
|