Air Conditioning Control Panel Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): Air Conditioning Control Panel Circuit
- Air Conditioning Control Panel Circuit

DESCRIPTION

This circuit consists of the heater control assembly and air conditioning amplifier assembly. When the heater 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 heater control assembly is operated.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

PROCEDURE

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

(a) Disconnect the F42 amplifier connector.

(b) Disconnect the F29 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.

2. CHECK HARNESS AND CONNECTOR (HEATER CONTROL - BATTERY AND BODY GROUND)

(a) Disconnect the F29 control 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 -- Continue to next step.

3. REPLACE HEATER CONTROL ASSEMBLY

(a) Replace the heater control assembly with a new or normally functioning one Removal.

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

OK:

Heater control assembly operates normally.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Air Conditioning System (for Manual Air Conditioning System)

OK -- END (HEATER CONTROL ASSEMBLY IS FAULTY)