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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Controls - Tests W/Codes - 5.2L CNG) >> Self-Diagnostic Tests >> Test TC-31A - Pcm Failure Sri Mile Not Stored & Pcm Failure EEPROM Write Denied (DTC 62 & 63)

Test TC-31A - Pcm Failure Sri Mile Not Stored & Pcm Failure EEPROM Write Denied (DTC 62 & 63)

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on. Using scan tool, perform SRI MEMORY CHECK. See ADJUSTMENTS MENU under SCAN TOOL TEST FUNCTIONS. If scan tool displays WRITE FAILURE, replace Powertrain Control Module (PCM). Perform TEST VER-2. If scan tool displays WRITE REFUSED, go to step 3).
  2. If scan tool displays SRI MILEAGE INVALID, update mileage and retest SRI memory. Perform TEST VER-2. If scan tool displays mileage, compare mileage on scan tool with instrument cluster odometer. If scan tool and instrument cluster odometer mileages are same, retest SRI memory. Perform TEST VER-2. If scan tool and instrument cluster odometer mileages differ, update mileage and retest SRI memory. Perform TEST VER-2.
  3. PCM was busy. Using scan tool, perform SRI MEMORY CHECK. Retest SRI memory 2 more times when necessary. If scan tool displays WRITE REFUSED, replace PCM. Perform TEST VER-2. If scan tool does not display WRITE REFUSED, test is complete. Perform TEST VER-2.
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