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:

* A/C control panel switch signals are sent to the display and navigation module display via AVC-LAN communication.

The display and navigation module display then sends these signals to the A/C amplifier via CAN communication.

w/o Navigation System:

* A/C control panel switch signals are sent to the accessory meter assembly via AVC-LAN communication.

The accessory meter assembly then sends these signals to the A/C amplifier 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 AVC-LAN CIRCUIT
A -- Continue to next step.

2. CHECK CAN COMMUNICATION SYSTEM

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

Result:

B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

3. CHECK AVC-LAN CIRCUIT

(a) Check for an open or short in all AVC-LAN circuits AVC-LAN Circuitfor HDD, AVC-LAN Circuit for DVD).

OK:

There is no open or short circuit.

NG -- REPAIR AVC-LAN CIRCUIT
OK -- Continue to next step.

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

(a) Disconnect the A/C control panel connector.

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

Standard Voltage:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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

5. CHECK AVC-LAN CIRCUIT

(a) Check for an open or short in all AVC-LAN circuits AVC-LAN Circuit.

OK:

There is no open or short circuit.

NG -- REPAIR AVC-LAN CIRCUIT
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - ACCESSORY METER ASSEMBLY)

(a) Disconnect the A/C amplifier connector.

(b) Disconnect the accessory meter assembly connector.

Text in Illustration

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

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

(a) Disconnect the A/C control panel connector.

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

Standard Voltage:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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