E39 / P2157 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Misfires
Injector 4 Circuit, Short to B+
Fault symptom
Malfunction Indicator Lamp
Misfires
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The battery voltage must be over 11 V. |
| Motor running more than 5 s. |
Fault criteria:
| The injector's power supply short circuited to B+ |
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.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| • | Injector 4 Circuit Status |
| (See also description of readings/activations in diagnostic tool) |
