22 · Diagnostics

Rev counter not working

Fault diagnosisRev counter not working

REV COUNTER NOT WORKING

With the engine started, the rev counter does not work, or it works irregularly.

The rpm signal supplied by the 'engine management node' and via the 'Body Computer node' gateway is made available to the 'instrument panel node'

0	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that with the engine started up: there is no failure message displayed	Continue to Step 2	There are faults detected	Continue to Step 1
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner) to the body computer Check the following on the CAN information network: control units inactive control unit errors control units with errors in CAN line	Continue to Step 2	Presence of errors at instrument panel node	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Presence of errors at instrument panel node	Continue to Step 2
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner) to the diagnostic socket or keep it connected and check: that there are no faults at the instrument panel node	Continue to Step 3	For the presence of errors or failed dialogue with the diagnostic equipment	Continue according to the instructions for the diagnostic equipment
3	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keeping the diagnostic equipment (Examiner) connected to the diagnostic socket, check: that the pointer is working via active diagnosis	Continue to Step 4	Rev counter is not working	Replace instrument panel Op. 5560B11
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		The fault persists	Search for the fault starting from another symptom'

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