80 Secondary Air Injection System, Bank 1 - Below Limit

P0410

80 Secondary Air Injection System, Bank 1 - Below Limit

Function
To improve emissions and to heat the three-way catalytic converter (TWC) faster, the secondary air injection pump is activated after the engine is started when cold, thus blowing secondary air behind the exhaust valves. The secondary air injection pump is switched on at an engine starting temperature of between - 10 °C and 42 °C and at an intake air temperature of between - 10 °C and 42 °C.

The secondary air injection system is deactivated under the following conditions:
battery voltage < 8 V
Air mass > 332 kg/h

Diagnosis conditions

P0410 - P1411:

NOTE: Secondary air diagnosis can be activated with the Porsche System Tester 2 in the Short test menu.

Wiring Diagram







System Overview







Diagnosis Procedure







1 Activate secondary air pump.
1. Remove relay of secondary air injection pump.
2. Jumper terminals 30 and 87.
3. The secondary air pump must be running (audible function).

or

1. Connect and switch on Porsche System Tester 2.
2. Select DME.
3. Call up the Drive links menu.
4. Select AIR pump.
5. Activate secondary air pump (audible function).

2 Check triggering of AIR pump.
1. Check fuse (Maxi Fuse) of AIR pump (on relay carrier 2).
2. Remove relay of AIR pump (on relay carrier 2). Connect voltmeter to pin 3 and ground.

Display: battery voltage

Connect voltmeter to pin 2 (negative) and pin 7 (positive).
Start engine (the DME relay must pick up).

Display: battery voltage

If 0 V is indicated, check wiring from pin 2 to DME control module, pin III/11, for continuity.
Push relay back on.

3. Remove connector of AIR pump.
Connect voltmeter to pin 1 (positive) and pin 2 (negative).
Trigger AIR pump with Porsche System Tester 2.

Display: battery voltage

3 Check electric change-over valve.
1. Remove two-pole connector of electric change-over valve.
2. Connect voltmeter to pin 1 (positive) and pin 2 (negative).
3. Trigger AIR pump with Porsche System Tester 2.

Display: battery voltage

4. Remove vacuum hose of electric change-over valve with the engine running. Check whether vacuum is present.

4 Check air change-over valve and air supply lines.
1. Run engine briefly to produce vacuum.
2. Trigger AIR pump with Porsche System Tester 2.
3. Remove vacuum hose of air change-over valve.

If vacuum is present at the air change-over 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 change-over valve.