A/C On Signal

A/C ON SIGNAL

Component Function Check


1. CHECK A/C ON SIGNAL

With CONSULT
1.Turn ignition switch ON.
2.Operate front blower motor.
3.Select "AIR CONDITIONER" of "BCM" using CONSULT.
4.Select "AIR COND SW" in "DATA MONITOR" mode, and check status under the following condition.





Is the inspection result normal?
YES- Inspection End.
NO- .


Diagnosis Procedure

Regarding Wiring Diagram information, Manual Air Conditioning System.

1. CHECK FUSE

1.Turn ignition switch OFF.
2.Check 10A fuse (No. 21, located in fuse block (J/B)].
NOTE:
Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES- GO TO 2.
NO- Replace the blown fuse after repairing the affected circuit.

2. CHECK THERMO CONTROL AMP. POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect thermo control amp. connector.
3.Turn ignition switch ON.
4.Check voltage between thermo control amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector between thermo control amp. and fuse.

3. CHECK THERMO CONTROL AMP. GROUND CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect front air control connector.
3.Check continuity between thermo control amp. harness connector and front air control harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK A/C ON SIGNAL

1.Turn ignition switch ON.
2.Check output waveform between thermo control amp. harness connector and ground with using oscilloscope.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 6.

5. CHECK FRONT AIR CONTROL

1.Turn ignition switch OFF.
2.Check front air control. .
Is the inspection result normal?
YES- Replace thermo control amp. Removal And Installation.
NO- Replace front air control. Removal And Installation.

6. CHECK A/C ON SIGNAL CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect BCM connector.
3.Check continuity between thermo control amp. harness connector and BCM harness connector.





Is the inspection result normal?
YES- Replace BCM. Service and Repair.
NO- Repair harness or connector.


Component Inspection


1. CHECK A/C CONTROL

Check continuity front air control terminals.





Is the inspection result normal?
YES- Inspection End.
NO- Replace front air control. Removal And Installation.