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ACC / B1928 05

Read the instructions below then start the fault diagnostic procedure.

Symptom: Heating in left-hand seat not working.

  B1928 05


Seat Temperature Sensor Left Circuit, Open/Short to B+

Fault symptom

Heating in left-hand seat not working.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.
Cabin temperature above -10°C.

Fault criteria:

Voltage on control module sensor input 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:

Test value:
Seat Temperature Left
Seat Temperature Sensor Left
Compartment Temperature
(See also description of readings/activations in diagnostic tool)