Description of On-Board Diagnostics

CIRCUIT DIAGNOSIS
Circuit fault diagnosis may be carried out on all Multiport Fuel Injection (MFI) vehicles using a good quality Multi Meter or the hand held tester. The tester displays the fault code and guides the operator by visual prompts, through a series of diagnostic checks. Full operational and diagnosis instructions are provided with the unit memory card.

Which ever instrument is used to diagnose the problem, the following checks must be carried out first. Reading Diagnostic Trouble Codes