TCM E39 / P0720 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Message appears in display.
Output RPM Sensor Circuit, Faulty Signal
Fault symptom
Message appears in display.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10.2 - 15.5 V. |
Fault criteria:
| Voltage on control module sensor input is below 0.2 V. |
| Voltage on control module sensor input exceeds 2.7V. |
System reaction to a fault:
| If the DTC remains during several test cycles: |
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:
| Vehicle Speed (Output RPM) |
| (See also description of readings/activations in diagnostic tool) |
