Control unit faulty (RAM) - signal unclear
Function
- Irregularities have been detected in the monitoring of the DME - control unit.
- For fault code P1671, there could also have been a malfunction of the DME - relay.
Diagnostic conditions:
- Ignition on
Possible causes of fault:
- DME control unit faulty
- DME relay faulty (for fault code P1671)
Information:
If only the fault code P1671 is entered, first check the DME relay and replace if necessary.
Part 1
Information about environmental conditions for the next work step:
The following conditions must be observed for step 2 (adaptation):
- Do not actuate accelerator pedal.
- Vehicle is stationary
- Engine not running
- Battery positive voltage between 10 V and 16 V
- Engine temperature between 5 锟斤拷C and 100 锟斤拷C
- Intake air temperature warmer than 10 锟斤拷C
Part 2
DME 7.8
P0605
405 Control module faulty (ROM) - signal implausible
Diagnosis conditions
- Ignition on
Possible fault cause
- DME control module faulty
Diagnosis/troubleshooting
NOTE: If no fault is present, delete the fault memory.