P0418

P0418

84 Secondary air injection pump - open circuit

Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V

Possible fault cause
- Wiring harness
- Relay faulty
- DME control module faulty

Affected terminals
Terminal III/11

Diagnosis/troubleshooting







84 Secondary air injection pump - below limit

Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V

Possible fault cause
- Short circuit to ground

Affected terminals
Terminal III/11

Diagnosis/troubleshooting







84 Secondary air injection pump - above limit

Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V

Possible fault cause
- Short circuit to B+

Affected terminals
Terminal III/11

Diagnosis/troubleshooting