ad1420d3000a

Exhaust gas recirculation (EGR) diagnosis operational check

Type ad · topic 14.20 · version 0101 · 2003-06-10

Applies to: ENGINE 601.943 in MODEL 901, 902, 903, 904 with CODE (MD1) Low pollution vehicle according to EC class 1

Where it sits

Function group 1 Engine › 14 Exhaust manifold, engine brake, emission control system › 14.20 Exhaust gas recirculation — Series 601 (models 943) · Series 901 · Series 902 · Series 903 · Series 904

AD14.20-D-3000A

Exhaust gas recirculation (EGR) diagnosis operational check

11.6.97

ENGINE 601.943 in MODEL 901, 902, 903, 904 with CODE (MD1) Low pollution vehicle according to EC class 1

Exhaust gas recirculation (EGR) diagnosis, previous knowledge

AD14.20-D-2000A

Function check

Test step / scope of test

Measuring instrument / test connection

Operation / requirement

Cause / remedy

1

Vacuum to solenoid valve

Tachometer

Y distributor

Vacuum manometer

Start engine

Wait approx. 100 s

Engine speed:

600 - 1000 rpm 0 mbar

1000 - 3300 rpm > 300 mbar

> 3300 rpm 0 mbar

Control module defective

Check individual parts

2

Vacuum to solenoid valve

Tachometer

Y distributor

Vacuum manometer

Micro switch

MS1 actuated

Engine speed:

600 - 1450 rpm 0 mbar

1450 - 2500 rpm > 300 mbar

> 2500 rpm 0 mbar

Control module defective

Check individual parts

3

Vacuum to solenoid valve

Tachometer

Y distributor

Vacuum manometer

Micro switch

MS1 + MS2 actuated

Engine speed:

600 - 3300 rpm In total speed range 0 mbar

Control module defective

Check individual parts

Referenced documents