P0646 is set when '0A' is detected in Aircon relay control circuit for more than 1 sec.. This code is due to open or short to ground in Aircon relay control circuit or internal open in relay component.
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 GND, Wiring open | |||
Diagnostic Time |
•
1.0 sec. | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
MIL | NO | |||
