Service & Repair Manual

28-40
Evaluation display groups 020/021/022/023/024 - ignition angle retardation
Indicated on display Possible cause Corrective action
All cylinders more than 12 KW
Knock sensor faulty
- Check knock sensor Page 28-41
Harness connector corroded
Knock sensor incorrect
tightening torque
- Loosen knock sensors and tighten to 20
Nm
Engine accessories loose
- Secure engine accessories
Poor fuel quality
- Change fuel quality
(see operating instructions)
One cylinder deviates significantly from
the others
Harness connector corroded
- Check knock sensor Page 28-41
Engine damage
Repair Manual, Engine Mechanical,
Repair Group 15
- Check compression pressure:
Engine accessories loose
- Secure engine accessories
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