ACC / B1928 05
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Heating in left-hand seat not working.
Seat Temperature Sensor Left Circuit, Open/Short to B+
Fault symptom
Heating in left-hand seat not working.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Cabin temperature above -10°C. |
Fault criteria:
| Control module output voltage exceeds 4.8 V. |
System reaction to a fault:
| Heating in the left-hand seat is switched off. |
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:
| Seat Temperature Sensor Left |
| (See also description of readings/activations in diagnostic tool) |
