If there is short to ground in A/C Relay circuit, ECM/PCM sets DTC P0646.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Circuit check, low | 1. Poor connection 2. A/C Relay 3. ECM/PCM 4. Short to ground in A/C compressor circuit |
Enable Conditions |
•
- | |
Threshold Value |
•
Short circuit to GND | |
Diagnostic Time |
•
Continuous | |
MIL On Condition |
•
DTC only |
