© 2002 Cannondale Corporation - All Rights Reserved
50
Electrical_EFI Service Manual.fm
THROTTLE POSITION SENSOR (TPS)
Fault
Possible Cause
Action
Throttle position sensor high
fault
Throttle position sensor low
fault
D a m a g e d T P S s e n s o r,
ECU, harness short or open
circuit, TPS sensor connector
disconnected or damaged
Component test the TPS sensor.
Check that sensor harness connector is
secure.
Disconnect ECU and go to Test 1.
Pinpoint Tests
Test
Result
Action
1. Check wire and terminal
integrity:
- P1 B3
- P1 E3
- P1 B4
OK
Disconnect TPS sensor and go to Test 2.
Faulty
Locate and correct wiring fault and go to
Test 5.
2 . C h e c k f o r s h o r t c i r c u i t
between:
- P1 E3 to ground
OK
Go to Test 3.
Short circuit
Locate and correct wiring fault and go to
Test 5.
3. Check cable continuity:
- P1 E4 to CN3 pin A
- P1 E3 to CN3 pin C
- P1 B3 to CN3 pin B
OK
Go to Test 4.
Open circuit
Locate and correct wiring fault and go to
Test 5.
4. Check cable for short circuit:
- P1 E3 to P1 B3
- P1 E3 to P1 E4
OK
Replace throttle position sensor, go to
Test 5.
Short circuit
Locate and correct wiring fault and go to
Test 5.
5. Reconnect harness, run
engine and check for presence
of fault.
OK
Done
Fault still present
Contact Cannondale Dealer Service.
Circuit Diagram
