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:

This circuit consists of the display and navigation module display and air conditioning amplifier assembly. When the display and navigation module display is operated, signals are transmitted to the air conditioning amplifier assembly through the CAN communication system.

If the CAN communication system malfunctions, the air conditioning amplifier assembly does not operate when the display and navigation module display is operated.

w/o Navigation System:

This circuit consists of the air conditioning control assembly, accessory meter assembly and air conditioning amplifier assembly. When the air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system.

If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate when the air conditioning control assembly is operated.

WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
* Before performing the inspection, check that there are no problems related to the CAN communication system. (w/ Navigation System)

PROCEDURE

1. CHECK VEHICLE TYPE

(a) Check vehicle type.

Result





B -- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BATTERY AND BODY GROUND)

(a) Disconnect the H4 display connector.





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

Standard Voltage:





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

Standard Resistance:





Text in Illustration





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

3. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY

(a) Replace the display and navigation module display with a new or normally functioning one Removal.

(b) Operate the display and navigation module display to check that it functions properly.

OK:

Display and navigation module display operates normally.

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

OK -- END (DISPLAY AND NAVIGATION MODULE DISPLAY IS FAULTY)

4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)

(a) Disconnect the G13 amplifier connector.

(b) Disconnect the H32 control connector.

(c) 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.

5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)

(a) Disconnect the H32 control connector.





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

Standard Voltage:





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

Standard Resistance:





Text in Illustration





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

6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - ACCESSORY METER)

(a) Disconnect the H32 control connector.

(b) Disconnect the H26 meter connector.

(c) 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.

7. REPLACE HEATER CONTROL SWITCH BOARD

(a) Replace the heater control switch board with a new or normally functioning one Disassembly.

(b) Operate the air conditioning control assembly to check that it functions properly.

OK:

Air conditioning control assembly operates normally.

NG -- REPLACE ACCESSORY METER ASSEMBLY

OK -- END (HEATER CONTROL SWITCH BOARD IS FAULTY)

8. REPLACE ACCESSORY METER ASSEMBLY

(a) Replace the accessory meter assembly with a new or normally functioning one Removal.

(b) Operate the accessory meter assembly to check that it functions properly.

OK:

Accessory meter assembly operates normally.

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

OK -- END (ACCESSORY METER ASSEMBLY IS FAULTY)