Black Widow Security BW 2800 Service Manual download pdf (Page 45)

Electrical_EFI Service Manual.fm

COOLING FAN (ATV ONLY)

Fault Possible Cause Action

Cooling fan short fault,

Cooling fan open fault

Damaged cooling fan or

ECU, harness short circuit,

fan connector disconnected or

damaged

Component test the cooling fan. Refer to

"Cooling Fan (ATV Only)" starting on

page 46.

Component test the coolant sensor.

Refer to "Coolant Sensor" starting on

page 53.

Check that cooling fan harness connector

is secure.

Verify good main fuse.

Disconnect ECU and go to Test 1.

Pinpoint Tests

Test Result Action

1. Check wire and terminal

integrity:

- P2 G1, P2 G2

OK Disconnect cooling fan and go to Test 2.

Faulty

Locate and correct wiring fault and go to

Test 5.

2. Check wire for short circuit:

- P2 G1 to ground

- P2 G2 to ground

OK Go to Test 3.

Short circuit

Locate and correct wire fault and go to

Test 5.

3. Check wire continuity

between:

- P2 G1 and CN22 pin B

OK Go to Test 4.

Open circuit Correct wiring fault, go to Test 5.

4. Verify 12V(+) at CN22 pin A

OK Go to Test 5.

None

Locate and correct wiring fault, go to Test

5. Reconnect the cooling fan

and ECU and verify proper fan

operation (on at 85°C, off at

80°C coolant temperature).

Verify correct airflow.

OK Done

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

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 59 60

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Black Widow Security BW 2800 Service Manual Page 45

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