22 · Diagnostics

Rev counter not working

Fault diagnosisRev counter not working

REV COUNTER NOT WORKING

With the engine running, the speedometer does not work or works irregularly;

the rpm signal is supplied by the "engine management node" and is made available to the "instrument panel node" via the "body computer node" gateway

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following with the engine running: no fault message is displayed	Move on to Step	Faults found	Move on to Step
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the CAN: no control unit not activated; that there are no faulty control units; no control unit with faulty CAN line;	Move on to Step	1. Faults on CAN network	1. Continue following the instructions for the diagnostic equipment
		Move on to Step	2. Errors on instrument panel node	Move on to Step
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the Examiner diagnostic equipment connected to the diagnostic connector, check the following at the instrument panel node:in errors ambient that there are no faults	Move on to Step	Presence of errors or failed dialogue with the diagnostic equipment	Continue following the instructions for the diagnostic equipment
3	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the Examiner connected, check the following on the instrument panel node:in active diagnosis ambient the operation of the rpm indicator	Move on to Step	Rev counter not working	Replace instrument panel See in Op. 5560B11 ANALOGUE CONTROL PANEL - R.R. or Replace
4	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present

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