Checking Adaptive Pilot Control

CHECKING ADAPTIVE PILOT CONTROL

Testing Requirements:





- Engine, oxygen sensor and catalytic converter have operating temperature.
- Oxygen sensor is heated electrically.
- Unscrew screws (1).
- Mount exhaust tester 13 0 090 on exhaust manifold with adapter 13 0 100.
- Connect BMW service test unit.





- Remove anti-tamper lock.
- Remove air cleaner with air flow sensor.
- Drill hole in anti-tamper lock with Special Tool 13 1 092.





- Screw Special Tool 13 1 094 in anti-tamper lock
- Knock special tool with anti-tamper lock out of air flow sensor with impact (1).
- Install air cleaner with air flow sensor.
- Run engine at idle speed.





- Pull off and plug vacuum hose on fuel pressure regulator.
- Oxygen sensor must regulate the CO level back to nominal value after a brief rise.
- Oxygen sensor is okay.





- Tighten air control screw in air flow sensor completely with Special Tool 13 1100 richer mixture.
- Run engine at idle speed CO level will be regulated back to nominal value.





- Disconnect oxygen sensor plug.
- CO level rises to approx 2.0 % by volume.
- Note instantaneous actual value.
- Stop engine.
- Disconnect battery ground lead briefly.
- This will cancel the value stored in memory of DME control unit.





- Start engine.
- If actual CO level value is considerably higher, adaptive pilot control is working.
- Connect vacuum hose again.
Adjust CO level to nominal value with Special Tool 13 1 100.
- Connect oxygen sensor.
- Remove exhaust tester.





- Remove and install air cleaner with air flow sensor.
- Insert new anti-tamper lock (1) in air flow sensor.