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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Engine Controls - Tests W/Codes - 2.5L) >> No-Start Tests >> Test NS-6A - Correcting No Response Condition

Test NS-6A - Correcting No Response Condition

WARNING: This page is about a different car, the 1995 Dodge Dakota. 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 DIAGRAM  section.
  1. If vehicle starts, go to TEST NS-6B. If vehicle does not start, turn ignition off. Disconnect Throttle Position (TP) sensor connector. Turn ignition on. Put scan tool in voltmeter mode.
  2. Using scan tool, check voltage on TP sensor connector Violet/White wire. If voltage is less than 6 volts, go to next step. If voltage is more than 6 volts, repair open ground circuits at Powertrain Control Module (PCM) connector terminals No. 5 (Black/White wire), No. 11 (Black/Tan wire) and No. 12 (Black/Tan wire). Perform TEST VER-1.
  3. If voltage is less than 4.4 volts, go to step 5). If voltage is more than 4.4 volts, reconnect TP sensor connector. Disconnect Manifold Absolute Pressure (MAP) sensor connector.
  4. Using scan tool, check voltage on MAP sensor connector Violet/White wire. If voltage is more than 4.4 volts, go to TEST NS-6B. If voltage is less than 4.4 volts, replace TP sensor. Perform TEST VER-1.
  5. Disconnect MAP sensor electrical connector. Using scan tool, check voltage on TP sensor connector Violet/White wire. If voltage is more than 4.4 volts, replace MAP sensor. Perform TEST VER-1.
  6. If voltage is less than 4.4 volts, turn ignition off. Disconnect PCM connector. Put scan tool in ohmmeter mode. Using scan tool, check resistance of PCM connector terminal No. 6 (Violet/White wire).
  7. If resistance is less than 5 ohms, repair short to ground in Violet/White wire. Perform TEST VER-1. If resistance is more than 5 ohms, using an external ohmmeter, check resistance between PCM connector terminals No. 4 (Black/Light Blue wire) and No. 6 (Violet/White wire).
  8. If resistance is less than 5 ohms, repair short to ground in Violet/White wire. If resistance is more than 5 ohms, turn ignition on. Put scan tool in voltmeter mode. Using scan tool, check voltage on PCM connector terminal No. 9 (Dark Blue wire).
  9. If voltage is less than 10 volts, repair open Dark Blue wire or Dark Blue/White wire between PCM connector and ignition switch. Perform TEST VER-1. If voltage is more than 10 volts, go to next step.
  10. Using scan tool, check voltage on PCM connector terminal No. 3 (Red/White wire). If voltage is more than 10 volts, replace PCM. Perform TEST VER-1. If voltage is less than 10 volts, go to next step.
  11. Remove fuse "D" from Power Distribution Center (PDC). Go to next step.
  12. Inspect fuse. If fuse is blown, go to step 14). If fuse is okay, put scan tool in voltmeter mode. Using scan tool, check voltage on battery voltage side of PDC fuse "D".
  13. If voltage is more than 10 volts, repair open between PDC fuse "D" and PCM connector terminal No. 3. Perform TEST VER-1. If voltage is less than 10 volts, repair open in battery voltage side of PDC fuse "D". Perform TEST VER-1.
  14. Turn ignition off. Disconnect Auto Shutdown (ASD) relay. Put scan tool in ohmmeter mode. Using scan tool, check resistance of PCM connector terminal No. 3 (Red/White wire). If resistance is less than 5 ohms, repair short to ground in Red/White wire. Perform TEST VER-1. If resistance is more than 5 ohms, go to TEST NS-6E.
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