PREVOST H3-41 - Engine Troubleshooting Flowchart

TECHNICAL INFORMATION
ENGINE TROUBLESHOOTING FLOWCHART
Start Engine
Engine Starts? Engine cranks?
Are there exhaust
fumes?
Gear selector in
neutral?
Possible cause:
-No fuel;
-Check the 2 fuel feeding
system breakers;
-Contact Detroit Diesel or
Prevost Action Service.
Faulty 24 volt supply or
low battery voltage.
Contact Prevost Action
Service.
Faulty 12 volt supply.
Possible cause:
-Faulty battery;
-Faulty connection;
-Blown fuse;
-Faulty battery equalizer.
Check voltage
reading on 24 volt
dashboard gauge.
Select neutral and start
engine.
Rear start switch in
"Normal" position?
Select "Normal" position.
Possible problem with the
starter or starter circuit.
Contact Detroit Diesel or
Prevost Action Service.
"Stop Engine"
telltale turns off after
5 seconds?
Check voltage
reading on 12 volt
dashboard gauge.
Retreive diagnostic
codes
1
and contact
Detroit Diesel Service or
Prevost Action Service.
Possible cause:
-Batteries low;
-Faulty battery;
-Faulty connection;
-Faulty battery equalizer.
Retreive diagnostic
codes
1
and contact
Detroit Diesel Service or
Prevost Action Service.
No
Yes
No < 24 volts
> 24 volts
No
Yes
No
No
No
Yes
Yes
Yes
Yes
> 10 volts
< 10 volts
(1) Refer to DDEC IV Diagnostic Codes in this chapter.
01093
124