G12 - Cylinder Balance Test

- Run the Key On Engine Running Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- After the last repeated Diagnostic Trouble Code (DTC), wait 5-10 seconds.

- "Goose" throttle lightly (not wide-open-throttle).

- Cylinder Balance Diagnostic Test Mode (DTM) will be performed. Time of test is 2-3 minutes.

- Is Code 90 present?

Yes -- Go to G7. G7 - Visually Inspect MAF Sensor

No -- Go to HB5. HB5 - Cylinder Balance Diagnostic Test Mode (DTM)