Air Conditioning Control Panel Does Not Operate

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Air Conditioning Control Panel does not Operate
- Air Conditioning Control Panel does not Operate

DESCRIPTION

This circuit consists of the integration control and panel and the air conditioning amplifier. When the integration control and panel 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 integration control and panel is operated.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-IG NO. 1)

(a) Remove the ECU-IG No. 1 fuse from the main body ECU.





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

Standard Resistance:





NG -- REPAIR FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL - BATTERY, BODY GROUND)

(a) Disconnect the H45 integration control and panel connector.





(b) Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance:





Standard Voltage:





(c) Reconnect the integration control and panel connector.

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

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - INTEGRATION CONTROL AND PANEL)

(a) Disconnect the H45 integration control and panel connector.





(b) Disconnect the H24 air conditioning amplifier connector.

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

Standard Resistance:





(d) Reconnect the air conditioning amplifier connector.

(e) Reconnect the integration control and panel connector.

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

4. REPLACE INTEGRATION CONTROL AND PANEL

(a) Replace the integration control and panel with a new or properly functioning one Removal.

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

OK:

Air conditioning control function operates normally.

NG -- REPLACE AIR CONDITIONING AMPLIFIER Removal

OK -- END (INTEGRATION CONTROL AND PANEL IS FAULTY)