© 2002 Cannondale Corporation - All Rights Reserved
44
Electrical_EFI Service Manual.fm
FUEL PUMP
Reported Fault
Possible Cause
Action
Fuel pump short
D a m a g e d f u e l p u m p
(internal short circuit), harness
short circuit, damaged ECU
Component test fuel pump. Refer to
"Fuel Pump" starting on page 44.
Make sure fuel pump connector and fuel
pump terminals are secure.
Verify good main fuse.
Disconnect ECU and go Test 1.
Fuel pump open
D a m a g e d f u e l p u m p
(internal open circuit) harness
open circuit, harness con -
nector disconnected or ter-
minals at pump loose or dis-
connected, o pen circuit to
battery 12V(+).
Pinpoint Tests
Test
Result
Action
1. Check wire and terminal
integrity:
- P1 H1
OK
Disconnect the fuel pump and go to Test
2.
Faulty
Locate and correct and go to Test 2.
2 . C h e c k f o r s h o r t c i r c u i t
between:
- P1 H1 to ground
Open
Go to Test 3.
Shorted
Locate and correct wiring fault; go to Test
7.
3. Check continuity between:
- P1 H1 and CN16 pin B
Continuity
Go to Test 4.
Open
Locate and correct wiring fault; go to Test
5.
4 . R e c o n n e c t E C U , p r e s s
e n g i n e s t a r t b u t t o n , w a i t 5
seconds and check for short
circuit between:
- CN16 B to ground
Open
Go to Test 5.
Shorted
Replace ECU, go to Test 7.
5. Verify 12V (+) at CN16 pin A
OK
Go to Test 6.
None
Locate and correct wiring fault; go to Test
6.
6. Reconnect the ECU and
fuel pump. Verify that pump runs
briefly (3 seconds) when engine
start button is pressed.
OK
Go to Test 7.
Faulty
Replace ECU and go to Test 7.
7. Run engine and check for
presence of fault.
OK
Done
Fault still present
Contact Cannondale Dealer Service.
Circuit Diagram
