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Home >> Volvo >> 1982 >> 240 L4-2127cc 2.1L SOHC B21F >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Testing and Inspection >> Component Tests and General Diagnostics >> Complete System Testing Procedure >> General Instructions
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General Instructions

Computerized Ignition System Testing





Always switch off the ignition when disconnecting/connecting ignition system terminals.





Begin by checking all relevant terminals and connectors before carrying out extensive fault tracing procedures.





Never let spark length exceed 5 mm when checking ignition system circuits or control unit may be damaged.
Consequently, connect spark plug to HT lead and earth plug via engine.





CAUTION: To avoid damaging the connector sleeves DO NOT DISCONNECT CONNECTOR from control unit when checking voltage. The volt-/ohm-meter should be connected directly to the wires.
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