If there is Short to ground in A/C Relay circuit, ECM sets DTC P0646.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal check, low | 1. Poor connection 2. A/C Relay 3. Short to ground in A/C compressor circuit 4. Faulty ECM |
Enable Conditions |
•
- | |
Threshold Value |
•
Short circuit to GND | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
NO MIL |
