U2106 7F

U2106 7F

TCM Missing on Bus







Fault symptom
- TCS/ESP warning lamp comes on.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Ignition ON.

Fault criteria:
- Control module receives faulty data from TCM

System reaction to a fault:
- Impaired function on TCS/ESP system

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:
- Bus Off Counter, P-Bus
(See also description of readings/activations in diagnostic tool)