Service manual

© 2002 Cannondale Corporation - All Rights Reserved
56
Electrical_EFI Service Manual.fm
CRANKSHAFT POSITION SENSOR
Fault Reported Possible Cause Action
Crank tooth sync fault
Damaged or contaminated
crankshaft position sensor,
damaged ECU, harness short
or open circuit, IACV con-
nector disconnected or
damaged
Check that harness connector is secure.
Check sensor air gap: 0.5 to 1.0 mm
Check for damaged flywheel teeth.
Check flywheel runout or play.
Disconnect ECU and go to Test 1.
Pinpoint Tests
Test Result Action
1. Check wire and terminal
integrity:
- P1 A1
- P1 B1
OK Disconnect sensor and go to Test 2.
Faulty
Locate and correct wiring fault and go to
Test 8.
2. Check cable for short circuit:
- P1 A1 to ground
- P1 B1 to ground
OK Go to Test 3.
Short circuit
Locate and correct wiring fault and go to
Test 8.
3. Check cable continuity:
- P1 A1 to CN2 pin 2
- P1 B1 to CN2 pin 1
OK Go to Test 4.
Open circuit
Locate and correct wiring fault and go to
Test 8.
4. Check cable for short circuit:
- P1 E1 to P1 F1
- P1 E2 to P1 F2
OK Go to Test 6.
Short circuit
Locate and correct wiring fault and go to
Test 8.
5. Check cable continuity:
- Sensor cable screen to (frame)
ground
OK Go to Test 7.
Open circuit
Locate and correct wiring fault and go to
Test 8.
6. Check sensor resistance:
Sensor pin 1 to pin 2
532 to 588 Ohms Go to Test 5.
Faulty Replace sensor and go to Test 8.
7. Check crank toothed wheel
- Damaged teeth
- Magnetic debris contamination
OK Go to Test 8.
Faulty
Clean / replace toothed wheel, go to Test
8.
8. Reconnect harness, run
engine and check for presence
of fault.
OK Done
Fault still present Contact Cannondale Dealer Service.