LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Engine Controls - Tests W/Codes - 3.9L) >> 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 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, 1995 Dodge Dakota, and 1995 Dodge Cab & Chassis. 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 1-3.
    DATA LINK CONNECTOR (DLC)

    Application DLC Location
    Dakota & Ram Pickup Right Rear Corner Of Engine Compartment
    Ram Van/Wagon Center Of Dash Panel In Engine Compartment, Near PCM
  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) (AB Body)
G95B27970Courtesy of CHRYSLER LLC
Fig 2: Locating Data Link Connector (DLC) (AN Body)
G95C27971Courtesy of CHRYSLER LLC
Fig 3: Locating Data Link Connector (DLC) (BR Body)
G95F27974Courtesy of CHRYSLER LLC
scientia non olet · About LEMON Manuals