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TCS/ESP / U2105 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: TCS/ESP warning lamp comes on. Message appears in display.

  U2105 00


ECM Missing on Bus

Fault symptom

TCS/ESP warning lamp comes on.

Message appears in display.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

Control module receives no signal (data) from ECM

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.
Check +15 to the ECU when this fault code is present.
ECM can communicate with the diagnostic tool but not on the bus when +15 is missing.

Functions in the diagnostic tool related to the fault:

Response test, under "All/Bus" menu.
(See also description of readings/activations in diagnostic tool)