AIR CONDITIONING SYSTEM > Air Conditioning Control Panel Circuit

for Preparation Click here


DESCRIPTION

w/ Navigation System:
  1. Center cluster module circuit (air conditioning control assembly) switch signals are sent to the air conditioning amplifier assembly via LIN communication.
    The air conditioning amplifier assembly then sends these signals to the display and navigation module display*1 or display and navigation module display*2 via CAN communication.
  2. *1: w/ Navigation system (for HDD)
  3. *2: w/ Navigation system (for DVD)
w/o Navigation System:
  1. Center cluster module circuit (air conditioning control assembly) switch signals are sent to the air conditioning amplifier assembly via LIN communication.

WIRING DIAGRAM


w/ Navigation System

E222706E02


w/o Navigation System

E222707E02


INSPECTION PROCEDURE

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

1.CONFIRM MODEL

Result:
Result
Proceed to
w/o Navigation System
A
w/ Navigation System
B



B
Go to step 5
A


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND)

  1. Disconnect the center cluster module circuit (air conditioning control assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H80-1 (ACC) - Body ground
    		Power switch off
    		Below 1 V
    Power switch on (ACC)
    		11 to 14 V
    H80-2 (IG+) - Body ground
    		Power switch off
    		Below 1 V
    Power switch on (IG)
    		11 to 14 V
    H80-4 (+B) - Body ground
    		Power switch off
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H80-16 (GND) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - CENTER CLUSTER MODULE CIRCUIT)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H80-11 (LIN1) - H85-37(LIN1)
    		Always
    		Below 1 Ω
    H80-11 (LIN1) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE CENTER CLUSTER MODULE CIRCUIT (AIR CONDITIONING CONTROL PANEL ASSEMBLY)

  1. Replace the center cluster module circuit (air conditioning control assembly) with a new or a known good one (Click here).

    OK:
    The center cluster module circuit (air conditioning control assembly) operation returns to normal.



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

END (CENTER CLUSTER MODULE CIRCUIT WAS DEFECTIVE) 

5.CHECK NAVIGATION SYSTEM

  1. Check that the navigation system operates normally.

    OK:
    The navigation system operates normally.

    Result:
    Result
    		Proceed to
    OK
    		A
    NG (w/ Navigation System (for HDD))
    		B
    NG (w/ Navigation System (for DVD))
    		C



B
GO TO NAVIGATION SYSTEM (for HDD) (Click here)

C
GO TO NAVIGATION SYSTEM (for DVD) (Click here)
A


6.CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND)

  1. Disconnect the center cluster module circuit (air conditioning control assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H80-1 (ACC) - Body ground
    		Power switch off
    		Below 1 V
    Power switch on (ACC)
    		11 to 14 V
    H80-2 (IG+) - Body ground
    		Power switch off
    		Below 1 V
    Power switch on (IG)
    		11 to 14 V
    H80-4 (+B) - Body ground
    		Power switch off
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H80-16 (GND) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - CENTER CLUSTER MODULE CIRCUIT)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H80-11 (LIN1) - H85-37(LIN1)
    		Always
    		Below 1 Ω
    H80-11 (LIN1) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.REPLACE CENTER CLUSTER MODULE CIRCUIT (AIR CONDITIONING CONTROL ASSEMBLY)

  1. Replace the center cluster module circuit (air conditioning control assembly) with a new or a known good one (Click here).

    OK:
    The center cluster module circuit (air conditioning control assembly) operation returns to normal.



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

END (CENTER CLUSTER MODULE CIRCUIT WAS DEFECTIVE)