E39 / P0243 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Performance loss.
Charge Air Control Valve Circuit, Open
Fault symptom
Malfunction Indicator Lamp
Performance loss.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 11 - 16 V. |
| Drive the car in 3rd gear, 2000 rpm. Accelerate up to 3500 rpm. |
Fault criteria:
| Open circuit on the control module's output. |
System reaction to a fault:
| Limp home - Only basic charge pressure |
OK report:
| Drive the car in 3rd gear, even acceleration at 1900 rpm. Then full gas acceleration (pedal not depressed 100%) up to 5000 rpm. |
Checking the wiring harness
Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| • | Charge Air Control Valve |
| • | Charge Air Control Valve |
| (See also description of readings/activations in diagnostic tool) |
