P0410

P0410
Secondary Air injection Signal Implausible (cylinders 1 - 3)

P1411
Secondary Air Injection Signal Implausible (cylinders 4 - 6)

Function
To improve emissions and to faster heat the three way catalytic converter (TWC), the secondary air injection pump is activated after the engine is started and when the engine is cold, thus blowing secondary air behind the discharge valves. If the engine temperature at start-up is less than - 100 C, the secondary air injection pump is disabled until the engine temperature has reached more than 600 C. Diagnosis runs while the secondary air injection system is active. The voltage of the oxygen sensors is checked by the ECM during this time.

Diagnosis conditions
Diagnosis of the secondary air injection system is carried out under the following conditions:
- Diagnosis has not yet been carried out in this cycle.
- The secondary air injection pump is switched on.
- The time after engine start-up is between 50 seconds and 120 seconds.
- Engine speed is between 720 1/min and 28001/min.
- Engine load is between 1.0 ms and 2.6 ms.
- Air mass < 100 kg/h.
- Engine temperature > 50°C.
- Vehicle must not be at an altitude above 2448 m above sea level.
- No fault at the injection final stages.
- No fault in the voltage supply.
- No fault in fuel tank ventilation.
- No misfires harmful to TWC.
- No fault at Mass Air Flow (MAS) Sensor.
- No fault in load recording.
- Oxygen sensors 1 and 2 ahead of TWC are ready for operation.





Wiring diagram





Diagnostic Procedure
In menu "Short test", activate secondary air injection (AIR) pump with system tester.
1. Run engine to operating temperature.
2. Stop engine.
3. Start engine again.
4. In menu "Short test", activate secondary air injection (AIR) pump with system tester.
5. Read voltage for oxygen sensor.

Check electric change-over valve.
1. Remove two1ead connector at change-over valve on AIR pump.
2. Connect voltmeter at connector for change-over valve.
3. In menu "Drive links", activate the AIR pump with system tester.
- Display: Battery voltage

- If no display: Remove connector X 60 at relay panel in left side of engine compartment. With ohmmeter, measure between pin No. 3 of connector X 60 and terminal 2 of two-pin connector for changeover valve:
- Display: 0 - 5 ohms
- Connect ohmmeter between terminal 1 of two-pin connector of the change-over valve and ground.
- Display: 0 - 5 ohms
- If values are not attained: Repair wiring harness.

4. With engine running, remove vacuum hose at changeover valve. Check for vacuum.
5. Reconnect vacuum hose to changeover valve. Restore connections in engine compartment and at the changeover valve.

Check air change-over valve and air supply lines.
1. In menu "Drive links", activate the AIR pump with system tester.
2. Remove vacuum hose from air changeover valve.

- If a vacuum is present at the air changeover valve, check air supply from the AIR pump to the changeover valve up to the air supply line to the cylinder heads.
- Check function of air changeover valve.

Check triggering of AIR pump.
1. Remove relay for AIR pump from relay panel in left side of engine compartment.
2. On relay panel, bridge terminals 87 and 30 with jumper cable.

CAUTION: The pump motor switches on with high current. Use cables with a gauge of at least 4 mm2.

- Pump motor starts.

3. At the relay connector, connect voltmeter red (positive) lead to terminal 86 and black (negative) lead to vehicle ground. Switch ignition on.
- Display: Battery voltage
- If not: Repair wiring harness between relay and connector X 4/1 as per wiring diagram.

4. Connect ohmmeter to relay connector between terminal 85 and disconnected ECM connector, pin 37.
- Display: 0 - 5 ohms
- If not: Repair wiring harness between relay connector and ECM connector.

5. At relay connector, connect voltmeter between terminal 86 (positive) and terminal 85 (negative). Start engine. In menu "Drive links", activate the air pump with scan tool.
- Display: Battery voltage
- If not: Replace ECM.
- If the AIR pump does not start after bridging the relay:

6. Check fuse 48 installed on relay panel on left side of engine compartment.

- If fuse is OK.
7. Remove relay. Connect voltmeter positive lead to relay terminal 30 and negative lead to vehicle ground.
- Display: Battery voltage
- If not: Connect ohmmeter between relay connector terminal 30 and connector X 60 pin 2.
- Display: 0 - 5 ohms
- If not: Repair wiring harness.

8. Connect ohmmeter between relay connector terminal 87 and connector pin 2 of the AIR pump.
- Display: 0 - 5 ohms
- If not: Repair wiring harness.
- If no malfunction was found when checking the wiring harness and the ECM, replace relay.