Can bus error
- Make
- Fiat
- Model
- Stilo Factory Service Manual
- Year
- 2001–2007
- Section
- Examiner › Can bus error
CAN BUS ERROR
The diagnostic equipment signals the following error: C1520 CAN error
This error is signalled if the controlunit does not detect the Body Computer or if there is a short circuit (supply or earth) at the CAN lines or between the actual lines
| Results of the tests | ||||
| 1 | BODY COMPUTER POWER SUPPLY CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| Check that the Body Computer is supplied correctly See E1010 SUPPLY | Continue to Step 2 | No Body Computer power supply | Restore the correct connections, if necessary, replace the Body Computer Op. 5505A32 | |
| 2 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems met | Operation |
Check that the connection between the Body Computer and the ABS control unit is correct See E7020 ABS. In particular, check that there is a resistance at the CAN of 60 Ohm at the brake control unit terminals with the connector fitted or 120 Ohm with the connector disconnected | Continue to Step 3 | CAN electrical connections faulty | Restore the correct connection Continue to Step 4 | |
| 3 | ABS CONTROL UNIT REPLACEMENT | All OK | Problems met | Operation |
| Replace the ABS electronic control unit Op. 3340A12, except if there are communication errors with other CAN control units (e.g. C1521). In this case, continue following the appropriate fault diagnosis | Continue to Step 4 | |||
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
Delete the errors using the diagnostic equipment. Carry out road See Test 3340A ABS intervention checkto make the control unit check whether there are still errors present. Return to the workshop and check that the fault is no longer present using the diagnostic equipment. | End of diagnosis | The fault persists | Continue to Step 3 | |
Parts & tools for this job For 2001 Fiat Stilo
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Fiat Stilo
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