Qt1 Carry Out The Pcm Quick Test
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
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).
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