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 air conditioning control assembly and the air conditioning amplifier assembly. When the 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 air conditioning control assembly is operated.
HINT: *: w/o Multi-display

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-IG NO. 2)
(a) Remove the ECU-IG NO. 2 fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY)





(a) Disconnect the F10 air conditioning control assembly connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:






Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL)





(a) Disconnect the F10 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:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)
(a) Replace the air conditioning control assembly with a new or properly functioning one Removal.
(b) Operate the front air conditioning control to check that it functions properly.
OK:
air conditioning control assembly function operates normally.
NG -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
OK -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY