Diagnostic Precautions - Mitsubishi 6M70 Workshop Manual

2. Diagnostic Precautions

• Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is per-
formed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved.
• Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow
at least 20 seconds.
• To avoid having electrical parts damaged, set the starter switch and lighting switch to LOCK or OFF before recon-
necting battery cables, harnesses and connectors.
• When performing measurement with the tester, handle the test bar carefully so that it does not damage internal
circuit and other electrical parts of the electronic control unit to result in a short-circuit failure between terminals in
connector or between connector and car body.
• Resistance is affected by temperature. Determine the necessity of resistance measurement following given tem-
perature specification as a guide. Otherwise, use normal temperature (10 to 35°C) as the measuring condition.
• To start the engine, be sure to connect the connector of the MPROP (rail pressure control valve) to the engine
harness. If the engine is started without connecting the MPROP connector, the engine electronic control unit can-
not control the supply pump and the fault of the engine may result.
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