| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002LLZ009X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Rear Air Conditioning Control Panel Circuit |
DESCRIPTION
This circuit consists of the No. 2 air conditioning control assembly and the air conditioning amplifier assembly. When the No. 2 air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate even if the No. 2 air conditioning control assembly is operated.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT FUSE (ECU-IG NO. 2) |
(a) Remove the ECU-IG NO. 2 fuse from the cowl side junction block LH.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-IG NO. 2 fuse |
Always |
Below 1 Ω |
|
|
2. |
CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY) |
(a) Disconnect the E55 No. 2 air conditioning control assembly connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E55-1 (E) - Body ground |
Always |
Below 1 Ω |
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
E55-6 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL) |
(a) Disconnect the E55 No. 2 air conditioning control assembly connector.
(b) Disconnect the E36 amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E36-21 (RLIN) - E55-4 (RLIN) |
Always |
Below 1 Ω |
|
E55-4 (RLIN) - Body ground |
Always |
10 kΩ or higher |
|
E36-21 (RLIN) - Body ground |
|
|
4. |
CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY (OPERATION) |
(a) Replace the No. 2 air conditioning control assembly with a new or properly functioning one
.
(b) Operate the No. 2 air conditioning control assembly to check that it functions properly.
OK:
No. 2 air conditioning control assembly function operates normally.
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