Air Conditioning Control Panel Does Not Operate

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Air Conditioning Control Panel does not Operate
- Air Conditioning Control Panel does not Operate

DESCRIPTION

This circuit consists of the air conditioning control and the air conditioning amplifier. When the air conditioning control is operated, signals are transmitted to the air conditioning amplifier through the LIN communication system.

If the LIN communication system malfunctions, the air conditioning amplifier does not operate even if the air conditioning control is operated.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (AIR CONDITIONING CONTROL ASSEMBLY - BODY GROUND)

(a) for TMC Made:

(1) Disconnect the E91 control connector.





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

Standard Resistance:





(b) for TMMC Made:

(1) Disconnect the E23 control connector.





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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

2. CHECK WIRE HARNESS (AIR CONDITIONING CONTROL ASSEMBLY - BATTERY)

(a) for TMC Made:

(1) Disconnect the E91 control connector.





(2) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





(b) for TMMC Made:

(1) Disconnect the E23 control connector.





(2) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL)

(a) for TMC Made:

(1) Disconnect the E91 control connector.





(2) Disconnect the E37 amplifier connector.

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

Standard Resistance:





(b) for TMMC Made:

(1) Disconnect the E23 control connector.





(2) Disconnect the E37 amplifier connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. REPLACE AIR CONDITIONING CONTROL ASSEMBLY

(a) Replace the air conditioning control with a new or properly functioning one.

(b) Operate the air conditioning control to check that it functions properly.

Result





B -- END (AIR CONDITIONING CONTROL ASSEMBLY IS FAULTY)

A -- REPLACE AIR CONDITIONING AMPLIFIER