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Powertrain Control Module (PCM) Verification Test

  1. Inspect vehicle to ensure that all engine components are properly installed and connected. Reconnect all previously disconnected components and connectors. If this test is being performed after a NO TROUBLE CODE repair, perform this step only. Check and see if initial symptoms still exist. If symptoms no longer exist, repair is complete. If initial symptom, or another symptom exists, repair by symptoms present. See DTC MESSAGE INDEX DIRECTORY  and SYMPTOMS INDEX DIRECTORY  tables. If there is no new DTC, and customer complaint cannot be duplicated, testing is complete.
  2. Connect scan tool to Data Link Connector (DLC), erase all DTCs and reset all values. If Powertrain Control Module (PCM) was replaced, perform this entire step. If PCM was not replaced, go to next step. If Powertrain Control Module (PCM) was replaced, it must be programmed with correct VIN and odometer. If PCM is replaced and is not programmed, DTC will be stored in Air Bag Control Module (ACM) and Controller Anti-lock Brake (CAB) module. If DTCs are set in ACM and CAB, enter correct VIN and odometer in PCM. Erase codes in ACM and CAB modules. In addition, if vehicle is equipped with Sentry Key Immobilizer System (SKIS), secret key data must be updated to enable vehicle to start. If vehicle is equipped with SKIS, obtain secret key data PIN code for vehicle from owner. Connect scan tool to DLC. Go to THEFT ALARM, then SKIM, then MISC. Place SKIM in secured access mode using secret key PIN code for vehicle. Select UPDATE SECRET KEY DATA. Data will transfer from SKIM to PCM.
  3. Road test vehicle. If this test is for an A/C related DTC, ensure the A/C system is operating during this test procedure. Drive vehicle for more than 5 minutes, at speeds of 40 MPH or more. Ensure transmission shifts properly through all gears. At some point, stop vehicle, turn engine off for at least 10 seconds. When finished with test drive, read DTCs present. If a DTC has set, return to symptoms list and perform appropriate procedure. See SYMPTOMS INDEX DIRECTORY  table. If DTC or symptom does not return, repair is complete.
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