AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) > Air Conditioning Control Panel Circuit

for Preparation Click here


DESCRIPTION

This circuit consists of the instrument cluster finish panel assembly and the air conditioning amplifier. When the instrument cluster finish panel assembly 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 instrument cluster finish panel assembly is operated.

WIRING DIAGRAM


E157369E13


INSPECTION PROCEDURE

NOTICE:
Inspect the fuse for circuits related to this system before performing the following inspection procedure.

1.CHECK HARNESS AND CONNECTOR (INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY - BODY GROUND)
E176175E01

  1. Disconnect the D5 instrument cluster finish panel assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D5-4 (GND) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the instrument cluster finish panel assembly connector.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Cluster Finish Panel Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY - IG CIRCUIT)
E176175E02

  1. Disconnect the D5 instrument cluster finish panel assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D5-4 (GND) - D5-5 (IG+)
    		Ignition switch ON
    		11 to 14 V

  1. Reconnect the instrument cluster finish panel assembly connector.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Cluster Finish Panel Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (INSTRUMENT CLUSTER FINISH PANEL - AIR CONDITIONING AMPLIFIER)
E176176E01

  1. Disconnect the D5 instrument cluster finish panel assembly connector.

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D5-3 (LIN1) - D15-37 (LIN1)
    		Always
    		Below 1 Ω

  1. Reconnect the instrument cluster finish panel assembly connector.

  1. Reconnect the air conditioning amplifier connector.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Cluster Finish Panel Assembly)
    *2
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY

  1. Replace the instrument cluster finish panel assembly with a new or properly functioning one (Click here).

  1. Operate instrument cluster finish panel assembly to check that it functions properly.

    OK:
    Air conditioning control function operates normally.



NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)
OK

END (INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY IS FAULTY)