PSG16 / P0645 F6
Read the instructions below then
start the fault diagnostic procedure.
Symptom: A/C not working, no cooling.
A/C Relay Circuit, Short to B+
Fault symptom
A/C not working, no cooling.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The following diagnostic trouble codes may not be generated: |
Fault criteria:
| Output short circuit to B+ for more than 0.6 s. |
OK report:
| Fault criteria NOT fulfilled for 0.6 s. |
Checking the wiring harness
| • | Faults in the control module female connector can be the cause of the DTC. Check the connector with respect to oxidation, depressed pins and pin clamping force. |
| • | Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force. |
Diagnostic help
Diagnosis regards:
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
