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TCS/ESP / U2139 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: TCS/ESP warning lamp comes on.

  U2139 00


CIM Missing on BUS

Fault symptom

TCS/ESP warning lamp comes on.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

No communication with CIM for more than 0.25 s.

System reaction to a fault:

No TCS/ESP function

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)