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Home >> Lexus >> 2011 >> GX 460 V8-4.6L (1UR-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> LIN Communication System >> Air Conditioning Control Panel does not Operate
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Air Conditioning Control Panel does not Operate





NETWORKING: LIN COMMUNICATION SYSTEM: Air Conditioning Control Panel does not Operate
- Air Conditioning Control Panel does not Operate

DESCRIPTION

When a switch of the heater control switch board*1 or No. 2 air conditioning control assembly*2 is operated, the heater control switch board*1 or No. 2 air conditioning control assembly*2 uses LIN communication to communicate with the air conditioning amplifier. If a switch of the heater control switch board*1 or No. 2 air conditioning control assembly*2 does not operate properly, a problem with the LIN communication between the heater control switch board*1 or No. 2 air conditioning control assembly*2 and air conditioning amplifier may be causing the malfunction.

* *1: w/o Navigation System

* *2: w/ Rear Air Conditioning System

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK SWITCH OPERATION

(a) Check the switch operation.

Result





*1: w/o Navigation System

*2: w/ Rear Air Conditioning System

B -- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - HEATER CONTROL SWITCH BOARD)

(a) Disconnect the G13 air conditioning amplifier assembly connector.

(b) Disconnect the H32 heater control switch board connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- Go to AIR CONDITIONING SYSTEM Symptom Related Diagnostic Procedures

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)

(a) Disconnect the G12 air conditioning amplifier assembly connector.

(b) Disconnect the T2 No. 2 air conditioning control assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- Go to AIR CONDITIONING SYSTEM Symptom Related Diagnostic Procedures
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