ad0752s3000a

PEC fuel injection and ignition system diagnosis operational check actual values (idle speed)

Type ad · topic 07.52 · version 0100 · 2003-06-06

Applies to: ENGINE 111.948 /978 in MODEL 638

Where it sits

Function group 1 Engine › 07 Mixture formation › 07.52 PEC-SFI fuel injection/ignition system — Series 638

Also applies to engines/gearboxes: 111 948, 111 978

AD07.52-S-3000A

PEC fuel injection and ignition system diagnosis operational check actual values (idle speed)

5.5.97

ENGINE 111.948 /978 in MODEL 638

Fuel injection and ignition system (PEC) diagnosis, previous knowledge

AD07.52-S-2000A

Function check

Actual value no.

Actual value

Specified value

Possible cause/Remedy

Engine coolant temperature

> 80 °C

Engine speed

75050 rpm

Lambda control

In the event of a complaint the Lambda control must be measured at idle speed and at 2500 rpm with the purge line (to engine) disconnected and sealed.

010 %

Ignition advance angle

The ignition advance angle is also used to stabilize idle speed and therefore in an extreme case the ignition advance angle may briefly deviate 10° from the specified value.

55 ° CKA before TDC

Closed throttle position contact (accelerator pedal not operated)

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Referenced documents