| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Power Source/Network | Section: Networking | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002U4V00CX |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Rear Heater Control Panel LIN Communication Malfunction |
DESCRIPTION
The LIN communication of the components related to the rear heater occurs between the air conditioning amplifier (A/C ECU) and rear air conditioning control panel.
HINT:
"Rear heater control panel" refers to the rear air conditioning control panel.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When using the Techstream with the engine switch off to troubleshoot:
Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - REAR AIR CONDITIONING CONTROL PANEL) |
(a) Disconnect the E36 amplifier connector.
(b) Disconnect the E55 panel connector.
(c) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E36-21 (RLIN) - E55-4 (RLIN) |
Always |
Below 1 Ω |
|
E36-21 (RLIN) - Body ground |
Always |
10 kΩ or higher |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E36-21 (RLIN) - Body ground |
Always |
Below 1 V |
|
|
2. |
CHECK REAR AIR CONDITIONING CONTROL PANEL (BATTERY VOLTAGE AND BODY GROUND) |
|
(a) Disconnect the E55 panel connector. |
(b) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E55-1 (E) - Body ground |
Always |
Below 1 Ω |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E55-6 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
|
|
3. |
CHECK REAR AIR CONDITIONING CONTROL PANEL |
(a) Temporarily replace the rear air conditioning control panel with a new or normally functioning one
.
(b) Check that the rear air conditioning function is normal.
OK:
Rear air conditioning function is normal.
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