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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Engine Controls - Tests W/Codes - 3.8L) >> Self-Diagnostic System >> Entering On-Board Diagnostics >> Scan Tool Diagnostic Mode

Scan Tool Diagnostic Mode

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). See DATA LINK CONNECTOR (DLC)  table for connector location. See Fig 1 .
    DATA LINK CONNECTOR (DLC)

    Application DLC Location
    All Models Left Rear Corner Of Engine Compartment
  2. Start engine (if possible). With foot on brake, move transmission shift lever through all positions, ending in Park. Turn A/C switch on and then off (if equipped).
  3. Turn engine off. Without starting engine again, turn ignition on. Using scan tool, access and record trouble codes.
  4. When scan tool trouble code message is obtained, refer to appropriate test number. To clear trouble codes, see CLEARING TROUBLE CODES  .
Fig 1: Locating Data Link Connector (DLC) (All Models)
G95E27973Courtesy of CHRYSLER CORP.
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