Air Conditioning Control Panel Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Air Conditioning Control Panel Circuit
- Air Conditioning Control Panel Circuit

DESCRIPTION

w/ Navigation System:

* 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.

* *1: w/ Navigation system (for HDD)

* *2: w/ Navigation system (for DVD)

w/o Navigation System:

* Center cluster module circuit (air conditioning control assembly) switch signals are sent to the air conditioning amplifier assembly via LIN communication.

WIRING DIAGRAM

1. w/ Navigation System

2. w/o Navigation System

INSPECTION PROCEDURE

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

PROCEDURE

1. CONFIRM MODEL

Result:

B -- CHECK NAVIGATION SYSTEM
A -- Continue to next step.

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

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

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

Standard Voltage:

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

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

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

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

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 Symptom Related Diagnostic Procedures

OK -- END (CENTER CLUSTER MODULE CIRCUIT WAS DEFECTIVE)

5. CHECK NAVIGATION SYSTEM

(a) Check that the navigation system operates normally.

OK:

The navigation system operates normally.

Result:

C -- GO TO NAVIGATION SYSTEM (for DVD) How to Proceed With Troubleshooting

B -- GO TO NAVIGATION SYSTEM (for HDD) How to Proceed With Troubleshooting
A -- Continue to next step.

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

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

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

Standard Voltage:

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

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

(a) 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.

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

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

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 Symptom Related Diagnostic Procedures

OK -- END (CENTER CLUSTER MODULE CIRCUIT WAS DEFECTIVE)