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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) >> No-Start Tests >> Test NS-6B - Correcting No Response Condition

Test NS-6B - Correcting No Response Condition

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.
NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  section at the end of this article.
  1. If ignition was not on when NO RESPONSE message was displayed, turn ignition on to get a response. If ignition was on when NO RESPONSE message was displayed, turn ignition off.
  2. Disconnect scan tool from Data Link Connector (DLC). Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance between DLC SCI transmit circuit (Pink wire) and ground.
  3. If resistance is less than 5 ohms, repair short to ground in Pink wire. Perform TEST VER-1. If resistance is more than 5 ohms, using an external ohmmeter, check resistance between DLC SCI receive circuit (Light Green wire) and ground.
  4. If resistance is less than 5 ohms, repair short to ground in Light Green wire. Perform TEST VER-1. If resistance is more than 5 ohms, go to next step.
  5. Using an external ohmmeter, check resistance of SCI transmit circuit (Pink wire) between DLC and PCM connector terminal No. 25. If resistance is more than 5 ohms, repair open Pink wire. Perform TEST VER-1.
  6. If resistance is less than 5 ohms, check resistance of SCI receive circuit (Light Green wire) between DLC and PCM connector terminal No. 45 using an external ohmmeter. If resistance is more than 5 ohms, repair open Light Green wire. Perform TEST VER-1.
  7. If resistance is less than 5 ohms, connect scan tool to a functional DLC on another vehicle. Turn ignition on. Using scan tool, attempt to read DTCs. If scan tool does not display NO RESPONSE, replace PCM on initial vehicle. Perform TEST VER-1.
  8. If scan tool displays NO RESPONSE, substitute another scan tool cartridge. Using scan tool, attempt to read DTCs. If scan tool does not display NO RESPONSE, replace scan tool cartridge. If scan tool displays NO RESPONSE, substitute another scan tool adapter cable. Using scan tool, attempt to read DTCs. If scan tool does not display NO RESPONSE, replace scan tool adapter cable. If scan tool displays NO RESPONSE, replace scan tool.
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