ESP / U2105 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: TCS/ESP warning lamp comes on.
Message appears in display.
ECM Missing on Bus
Fault symptom
TCS/ESP warning lamp comes on.
Message appears in display.
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
| Control module receives no signal (data) from ECM |
System reaction to a fault:
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) |
