18 · Diagnostics

K52 Code failure warning light on

Fault diagnosisK52 Code failure warning light on

The CODE warning light remains on permanently. The I.E. warning light carries out the initial test normally

Step	Test procedure	Result	Action
1	CHECK WITH DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner) to the diagnostic socket and check whether there are errors in the engine management control unit or the Body Computer	OK	Move onto step 2
		Errors detected in the control unit	Continue following the instructions for the diagnostic equipment End of diagnosis
		Errors detected in the Body Computer	Continue following the instructions for the diagnostic equipment End of diagnosis
2	SUPPLY CHECK Check the engine management control unit supply Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL	OK	Move onto step 3
2		No supply	Restore the correct supply Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL End of diagnosis
3	SAFETY STARTING Remove the supply for the Body Computer and start the vehicle using the recovery procedure by pressing the accelerator pedal	OK	Move onto step 4
3		The engine does not start	Replace control unit Op. 1056B82 End of diagnosis
4	CHECK ON CORRECT OPERATION Check that the fault is no longer present	OK	Incorrect selection of diagnostic procedure
4		The fault persists: Body Computer defective	Replace the Body Computer Op. 5505A32 Incorrect selection of diagnostic procedure

Parts & tools for this job For 2000 Alfa Romeo 147

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