QT: Step 1: PCM QUICK TEST QT1 PERFORM PCM QUICK TEST Note: If the vehicle was brought in with an emission compliance failure symptom, please refer to: Pinpoint Test EM See: Pinpoint Tests\Tests EM: Emissions Compliance
Complete preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed:
Related electrical connectors or fuses
Vacuum lines (leaks, routing )
Air intake system (leaks, restrictions)
Fuel quality (octane, contamination winter/summer blend)
Cooling system (engine operating at proper temperature)
Access any related OASIS or TSB information (if available).
Complete PCM Quick Test to access any DTCs. Note any Key On Engine Off, Key On Engine Running (if engine runs) and Continuous Memory (MIL and non-MIL) DTCs. Note: If unable to access DTCs, or any scan tool communication concern exist, refer to Pinpoint Test QA See: Pinpoint Tests for additional information on retrieving MIL and non-MIL DTCs, refer to Diagnostic Methods See: Scan Tool Testing and Procedures\Diagnostic Methods Overview (Continuous Memory Self-Test).
QT2 ENGINE RUNS ROUGH AT IDLE WITH KEY ON ENGINE RUNNING OR CONTINUOUS MEMORY DTC(S): CHECK INJECTOR FAULT (INJxF) PID(S) Note: An injector circuit could result in unrelated DTC(s) being received from the PCM.
Key on, engine off.
Access the INJxF PIDs (the "x" indicates the injector number). There will be one INJxF PID for each engine cylinder. Does any of the INJxF PIDs indicate "Yes"?
