E39 / P0034 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Charge Air Bypass Valve Circuit, Short to Ground
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
| Bypass valve activated/deactivated once. |
| Carry out full throttle acceleration and release accelerator pedal quickly in order to open the bypass valve. |
Fault criteria:
| Control module output shorted to ground. |
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:
| • | Charge Air Bypass Solenoid |
| • | Charge Air Bypass Solenoid |
| (See also description of readings/activations in diagnostic tool) |
