Volvo Penta D1-13 Workshop Manual page 35

47704383 06-2013 © AB VOLVO PENTA
Fault tracing
Preconditions
If preheating is activated the preheat symbol will be
visible in the tachometer and/or the display.
Fault condition 1
The engine does not crank when the start/preheat but-
ton is pushed.
Possible reason
The neutral switch is not activated (switch open).
•
• The coolant temperature is below 50 °C (122 °F) and
therefore preheating is activated.
• Open circuit between the MDI start output and the
starter solenoid at the starter motor.
• Faulty starter solenoid at the starter motor.
• Faulty starter relay inside the MDI unit (not replace-
able).
Suitable action
1 Check that the neutral switch is activated (switch
closed).
2 Preheating is activated due to too cold coolant tem-
perature. Repress the start/preheat button within 10
seconds to activate the starter motor.
3 Check wiring and the connections between the MDI
start output and the starter solenoid at the starter
motor.
4 Check the starter solenoid at the starter motor.
5 Try with another MDI unit.
Fault condition 2
The preheat symbol is not visible in the tachometer
and/or the display.
Possible reason
The coolant temperature is above 50 °C (122 °F)
•
and therefore preheating is not activated.
• Open circuit between the MDI preheating output and
the glowing plugs.
• Faulty preheat relay inside the MDI unit (not replace-
able).
Suitable action
1 Check the wiring and connections between the MDI
and the glowing plugs via the conductor rail.
2 Try with another MDI unit.
30-2 Fault Tracing
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