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:

* Integration control and panel 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 via CAN communication.

w/o Navigation System:

* Integration control and panel 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 multi-display 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 CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. CHECK LIN COMMUNICATION CIRCUIT

(a) Check for an open or short in all LIN circuits Reading and Clearing Diagnostic Trouble Codes.

OK:

There is no open or short circuit.

NG -- GO TO LIN COMMUNICATION SYSTEM LIN Communication System
OK -- Continue to next step.

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

(a) Disconnect the integration control and panel 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.

4. REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

(a) Replace the integration control and panel assembly with a new or a known good one Removal.

OK:

The integration control and panel assembly assembly operation returns to normal.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

OK -- END

5. CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally Diagnosis System.

Result:

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

6. CHECK LIN COMMUNICATION CIRCUIT

(a) Check for an open or short in all LIN circuits Reading and Clearing Diagnostic Trouble Codes.

OK:

There is no open or short circuit.

NG -- GO TO LIN COMMUNICATION SYSTEM LIN Communication System
OK -- Continue to next step.

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

(a) Disconnect the integration control and panel 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.

8. REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

(a) Replace the integration control and panel assembly with a new or a known good one Removal.

OK:

The integration control and panel assembly assembly operation returns to normal.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

OK -- END