Qt1 Carry Out The Pcm Quick Test
WARNING: This page is about a different variant/trim than selected.
NOTE:
If the vehicle was brought in with an emission compliance failure symptom, GO to PINPOINT TEST EM
.
- Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed below:
- 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 TSB information (if available).NOTE: For applications that use a stand-alone transmission control module (TCM), the PCM does not output TCM related DTCs. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION for diagnosis and testing.NOTE: If unable to access the DTCs, or any diagnostic tool communication concern exists, GO to PINPOINT TEST QA . For additional information on retrieving MIL and non-MIL DTCs, refer to CONTINUOUS MEMORY SELF-TEST in DIAGNOSTIC METHODS - GASOLINE MODELS.
- Complete the PCM Quick Test to access any DTCs. Note any key on engine off (KOEO), key on engine running (KOER) (if engine runs) and Continuous Memory (MIL and non-MIL) DTCs.
Are any DTCs present?
| Yes | No |
|---|---|
| If the engine runs rough at idle and KOER or Continuous Memory DTCs are present: | GO to STEP 2: NO DTCS PRESENT SYMPTOM CHART INDEX for direction to the proper STEP 3 Chart.
NOTE:
If the symptom is not listed, REFER to the applicable service information article or GO to PINPOINT TEST Z
for intermittent PCM system diagnostics.
|
| GO to Quick Test QT2 to check injector fault PIDs. | |
| All others: | |
| GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for direction to repair DTCs after noting the following: | |
Diagnose DTCs in the following order (begin diagnosis with the first DTC output in that mode and diagnose any circuit related DTCs first).
|