Section 02 TROUBLESHOOTING
Subsection 02 (DIAGNOSTIC FLOW CHART)
DIAGNOSTIC FLOW CHART
FUEL SYSTEM
OK
Fails
OK
Fails
FUEL SYSTEM OK
Retest
Replace fuel
pump module
Perform fuel pump test
Check fuel line/
rail for leaks
Fuel pressure less
than 350 kPa (51 PSI)
Fuel pressure more
than 350 kPa (51 PSI)
Fuel pressure is
350 kPa (51 PSI)
Perform fuel
pump test
Crank or Start engine
OK
Check fuel
injectors
Check
fuel line/
rail for leaks
Repair or
replace
Fast
pressure drop
Verify fuel
pump check
valve
Fails
Yes
OK
OK
Fails
Fails
Repair or
replace
Replace fuel
pump module
Turn ignition key ON and set engine
stop switch to RUN
Fuel pump does not run
Fuel pump runs
for 5 sec. then stops
Install fuel pressure gauge
on fuel pressure line
- Check fuses and relays.
- Check ignition switch and
engine stop switch.
- Check fuel pump operation.
- Repair or replace if necessary.
Fuel pressure is
350 kPa (51 PSI)
Fuel pressure more
than 350 kPa 51 PSI)
Fuel pressure less
than 350 kPa (51 PSI)
Fuel pump runs
No
Turn ignition key ON and set engine
stop switch to RUN
OK
Fails
vmr2008-023-100_aen
vmr2008-008
15
Summary of Contents for DS 450 2008
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