H5 - Cylinder Balance Diagnostic Test Mode: 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 -- For Symptoms: Return to Diagnosis by Symptom (Diagnostic Routines).

For Diagnostic Trouble Codes (DTC) 136, 172, 176: Go to H13. H13 - Check Secondary Air Injection Operation

For DTCs 137, 173, 177: Go to H24. H24 - Check HO2S Signal For Short to Power

For all others: Go to H14. H14 - Check HO2S Integrity

No -- Go to H7. H7 - Check Resistance of Injector(s) and Harness MFI Engines