Component Location
General Description

Aircon Relay which is controled by ECM supplies and cut electrical power to Aircon compressor. ECM activates or deactivates Aircon Relay based on inputted signal such as aircon switch siganl and Aircon pressure switch signal.

As controlling Aircon Relay, ECM 1)turns OFF aircon compressor at rapid acceleration to retain suffiecient capacity for acceleration, 2)actively performs idle-up function to cope with the change of engine load which happens at aircon compressor operation.

DTC Description

P0647 is set when excessive current is detected in Aircon relay control circuit for more than 1 sec.. This code is due to short to battery in Aircon relay control circuit or internal short in relay component.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Voltage monitoring

● A/C relay circuit

● A/C relay component

Enable Conditions

● IG KEY "ON"

Threshold Value

● Short to battery

Diagnostic Time

● 1.0 sec.

Fail Safe

Fuel Cut

NO

EGR Off

NO

Fuel Limit

NO

Check Lamp

NO

Schematic Diagram
note
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