22 · Diagnostics

Rev counter not working

Make: Fiat
Model: Ulysse Factory Service Manual
Year: 2002–2010
Section: Instrument panel › Rev counter not working

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Fault diagnosisRev counter not working

REV COUNTER NOT WORKING

The signal for the rev counter is produced by the "Engine Management Control Unit" then converted by the "Body Computer Node" and displayed on the rev counter in the centre of the dashboard.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	BATTERY VOLTAGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the battery voltage is correct.	Move on to Step	Battery voltage not correct.	Restore the correct voltage.
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check, in the Instrument Panel ambient, that there are no errors and that the parameters are present.	Move on to Step	1. Impossible to connect with the control unit.	Move on to Step
		Move on to Step	2. Errors present	Move on to Step
3	ERRORS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for the presence of one or more of the following errors using the Examiner in the Instrument Panel ambient: No communication with the BSI VAN line error Control unit broken Engine rpm error	Move on to Step	1. No communication with Body Computer error detected and/or VAN CONfor. network error and/or control unit broken.	Move on to Step
		Move on to Step	2. Engine rpm error	Move on to Step
4	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in the Instrument Panel ambient check that the function in question is correctly activated in Active Diagnosis. Rev counter	Move on to Step	The component in question is not activated. It is not operated by the active diagnosis.	Replace the Instrument Panel Node control unit.
6	BATTERY VOLTAGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the battery voltage is correct.	Move on to Step	Battery voltage not correct.	Restore the correct voltage.
7	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check, in the Engine Management Control Unit ambient, that there are no errors and the following parameters are present and vary: Engine rpm	Move on to Step	1. Impossible to connect with the control unit.	Move on to Step
			2. Presence of errors.	Move on to Step
			3. The values do not change with the engine running	3. Replace the Engine Management Node control unit
8	ERRORS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for the presence of one or more of the following errors using the Examiner in the Engine Management Control Unit ambient: CAN line error (connection with other control units) CAN line (connection with ABS) No communication between injection ECU and other control units No communication on CAN Internal control unit error	Move on to Step	1. No communication with Body Computer error detected and/or CAN error and/or control unit broken.	Move on to Step
			2. No communication with CAN error detected	Move on to Step
			3. Internal injection control unit error detected	3. Replace the Engine Management control unit
10	BATTERY VOLTAGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the battery voltage is correct.	Move on to Step	Battery voltage not correct.	Restore the correct voltage.
11	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check, in the Body Computer ambient, that there are no errors and the following parameters are present:	Move on to Step	1. Impossible to connect with the control unit.	Move on to Step
		Move on to Step	2. Errors present	Move on to Step
12	ERRORS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for the presence of one or more of the following errors using the Examiner in the Body Computer ambient: VAN CONF error: connection with Instrument Panel VAN CONF command inconsistency Multif. or Navig. display error CAN line error (connection with other control units)	Move on to Step	1. No communication with Instrument Panel error detected and/or VAN CONfor. network error and/or control unit broken.	Move on to Step
			2. No communication with Engine Management error detected and/or CAN error and/or control unit broken.	Move on to Step
			3. Control unit broken.	3. Replace the Body Computer control unit
14	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present

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Parts & tools for this job For 2002 Fiat Ulysse

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