The problem: A Proton Impian was suffering from intermittent starting problems, and the vehicle randomly cut out. This caused the engine warning light to illuminate.
The first stage of the investigation was to use a diagnostic tool and obtain any ‘DTC’ (Diagnostic Trouble Codes) information and relevant data from the ECU. However, when this was tried, there was no communication with the scan tool. At this point it was unknown whether the scan tool or the ECU the vehicle was at fault.

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