23 · Diagnostics

Turbo pressure gauge not working

Fault diagnosisTurbo pressure gauge not working

TURBO PRESSURE GAUGE NOT WORKING

1.9 JTD 8V, 1.9 JTD 16V, 2.4 JTD 20V

With the ignition ON, the maximum turbocharger pressure warning light in the instrument panel is not working

The turbocharger pressure signal is made available to the instrument panel by the engine management node and, via the serial line, to the gauge.

1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the Examiner diagnostic equipment connected to the diagnostic socket, check the operation of the warning light through active diagnosis	Move on to Step 2	1.The warning light does not work because the wiring for the serial line and the NQS is interrupted	1.Renew serial line
			2.Instrument panel defective	2.Replace instrument panel Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE
			3.Instrument power supply interrupted	3.Restore correct power supply.
2	ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for the presence of a PWM signal from the engine management node to the instrument panel See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 3	1.Wiring between turbo sensor and NCM interrupted	1.Renew the wiring
			2.Turbo sensor defective	2.Replace the supercharging sensor Op. 1060G16 PRESSURE RELIEF SENSOR - R.R.
			3.Signal between NCM and NQS interrupted	3.Restore correct signal.
			4.Instrument defective	4.Replace gauge Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE
3	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R

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