BCM / B0473 01
Read the instructions below then
start the fault diagnostic procedure.
Symptom: No heating in car when parking heater activated.
Parking Heater Fan Relay Circuit, Short to B+
Fault symptom
No heating in car when parking heater activated.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Parking heater fan relay activated. |
Fault criteria:
| When the current is 0A and the relay is activated. |
Checking the wiring harness
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:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| Parking Heater Fan Relay (MCC) |
| (See also description of readings/activations in diagnostic tool) |
