E39 / P0641 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE
5V Supply Group 1, Short to Ground/B+
Fault symptom
CHECK ENGINE
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
| When the 5-volt output to the following components short circuits to ground or B+: |
| • | Camshaft position sensor, intake |
| • | Camshaft position sensor, exhaust |
| • | Fuel pressure sensor, fuel rail |
Dependent:
OK report:
| Fault criteria NOT fulfilled. |
Fault handling:
| (See section Fault handling III, "Other emission-related components and functions" for more information.) |
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.
| • | Faults in the control module female connector can be the cause of the DTC. Check the connector with respect to oxidation, depressed pins and pin clamping force. |
Diagnostic help
Diagnosis regards:
Functions in the diagnostic tool related to the fault:
| Read values for the above components. |
| (See also description of readings/activations in diagnostic tool) |
