TCM E39 / U0100 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Message appears in display.
ECM Missing on Bus
Fault symptom
Message appears in display.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Voltage is over 9V but under 16V |
| Ignition on for at least 5 s. |
Fault criteria:
| The control module has no communication with 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 on bus leads or in the component. |
