P1657

P1657

274 Overrun Recirculating Air Valve Output Stage - Open Circuit

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

Possible fault cause
- Open circuit
- Open circuit in B+ supply
- Overrun recirculating air valve

Affected terminals
III/16

Diagnosis/Troubleshooting

NOTE: The wiring for the overrun recirculating air valve is routed via the connector X 59/3 pin 8.







274 Overrun Recirculating Air Valve Output Stage - Below Limit

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

Possible fault cause
- Short to ground triggering wire

Affected terminals
III/16

Diagnosis/Troubleshooting

NOTE: The wiring for the overrun recirculating air valve is routed via the connector X 59/3 pin 8.







274 Overrun Recirculating Air Valve Output Stage - Above Limit

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

Possible fault cause
- Short circuit to B+ triggering wire

Affected terminals
III/16

Diagnosis/Troubleshooting

NOTE: The wiring for the overrun recirculating air valve is routed via the connector X 59/3 pin 8.