P0118
P011800Diagnosis information DME control unit
Coolant pump Charge air cooler
Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check, erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
- Ignition on
Possible fault causes
- Open circuit/short circuit to ground
- Open circuit/short circuit to B+
- Open circuit
Fault setting condition(s)
- Final stage Fault Open circuit
- Final stage Fault Short circuit to ground
- Final stage Fault Short circuit to B+
NOTE:
Diagnosis/Fault finding.
- Line test
P260000: Check component, line test
P195000: Perform fan activation drive link test. The fan should accelerate to max. speed within 10 seconds
P260200: Check valve internal resistance, line test
P260300: Check valve internal resistance, line test
P261C00: Line test
P261D00: Line test