HA5 - Diagnostic Test Mode (DTM): MFI Engines

- Connect tachometer to engine. Run engine at idle.

- Disconnect and reconnect the injectors one at a time: note rpm drop for each injector.

- Does each injector produce a momentary drop in rpm?

NOTE: Idle Air Control (IAC) will attempt to re-establish rpm.

Yes -- Go to Ignition Section/Testing and Inspection.

No -- Go to HA7. HA7 - Check Resistance of Injector(s) and Harness - MFI Engines