Air Injection: Service and Repair

NOTE:
- A general check should be carried out with the Scan Tool (ST) in mode 3.
- If this does not indicate a fault and the air pump still does not operate, carry out further checks.


Procedures
- Air pump, Check: 1 through 3
- Air pump, Replacement: 4 through 8

Check





1. Check ground point:
- Check that pump is grounded to ground terminal under the left headlamp.

Air Pump and Relay:

2. Check air pump:
- Raise car and remove front splashguard by removing two screws on each side, then pull splashguard and spoiler forward until the splashguard can be lowered. Undo splashguard from spoiler clips.
- Disconnect both outer relay connectors.
- Connect both blue wires.
- If the pump nova works, the problem is probably poor contact in the relay connector or relay. Replace.

CAUTION: The pump must not be run for more than two minutes due to the risk of overheating.

Relay Ground:

3. If the pump does not work:
- If the pump does not work, check that wiring between relay and pump is intact and that there is 12 V and ground in the connector.
- If there is no current in the connector and the scan tool does not display a DTC, the relay is defective and should be replaced.
- If the pump does not work despite current and ground the pump is defective and should be replaced.

Replacement





4. Remove:
- battery and battery shelf
- air hose to engine
Undo air pump inlet pipe from pump.
Raise car.

Air Pump and Relay:

5. Remove front splashguard if not already removed:
- Disconnect connectors.
- Undo wiring clamps.
- Remove three screws.
- Lower car.





6. Remove air pump:
- Disconnect air hose and ground lead in the terminal under the left headlamp.
- Remove air pump.

Control Valve:

7. Install air pump:
- Install in reverse order.
- Clamp EGR pipe so that it does not come into contact with air hose.





8. Check non-return valve:
- Disconnect non-return valve rubber hose and start engine.
- Check that exhaust gases do not flow back to pump.
- If exhaust gases flow back to pump the non-return valve is defective and must be replaced.
- When carrying out this check use compressed air to blow the system clean with the engine running.