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Test NS-6A - Correcting A No Response Condition

WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST TC-1A  before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION  at beginning of article. For wiring diagrams, see WIRING DIAGRAMS  at the end of this article. Perform TEST VER-1A  after each repair.
  1. If vehicle starts, go to TEST NS-6B  . If vehicle does not start, turn ignition off. Disconnect Throttle Position Sensor (TPS) connector and ensure connector is clean and not damaged. Turn ignition on.
  2. Using scan tool in voltmeter mode, check voltage on 5-volt supply circuit at TPS connector terminal No. 3 (Violet/White wire). If voltage is more than 6 volts, repair open ground circuits at PCM connector terminals No. 5 (Black/White wire on XJ and YJ bodies or Black/Tan wire on ZJ body), No. 11 and No. 12 (Black/Tan wire on XJ and ZJ bodies or Black wire on YJ body). If voltage is less than 6 volts, go to next step.
  3. If voltage is less than 4.4 volts, go to step 5). If voltage is more than 4.4 volts, turn ignition off and reconnect TPS connector. Disconnect Manifold Absolute Pressure (MAP) sensor connector and ensure connector is clean and not damaged.
  4. Turn ignition switch on. Using scan tool, check voltage on MAP sensor 5-volt supply circuit at MAP sensor connector terminal No. 3 (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 TPS.
  5. Disconnect MAP sensor electrical connector and ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on 5-volt supply circuit at TPS connector terminal No. 3 (Violet/White wire). If voltage is less than 4.4 volts, go to next step. If voltage is more than 4.4 volts, replace MAP sensor.
  6. Turn ignition off. Disconnect PCM 60-pin connector and ensure connector is clean and not damaged. Using scan tool in ohmmeter mode, check resistance of 5-volt supply circuit at PCM connector terminal No. 6 (Violet/White wire). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground in Violet/White wire.
  7. Using an external ohmmeter, check resistance between PCM 60-pin connector terminal No. 4 sensor ground (Black/Light Blue wire), and terminal No. 6 5-volt supply circuit (Violet/White wire). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground on 5-volt supply circuit.
  8. Turn ignition on. Using scan tool in voltmeter mode, check voltage on fused ignition switch output circuit at PCM connector terminal No. 9 (Dark Blue wire on XJ body, White/Yellow wire on YJ body, or Light Blue/Red wire on ZJ body). If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open in fused ignition switch output circuit between PCM connector terminal No. 9 and ignition switch.
  9. Using scan tool voltmeter mode, check voltage on fused battery voltage circuit at PCM connector terminal No. 3 (Red wire on XJ and ZJ bodies or Red/White wire on YJ body). If voltage is less than 10 volts, go to next step. If voltage is more than 10 volts, replace PCM.
  10. Remove Engine Control (ENG CNTR) PCM fuse from Power Distribution Center (PDC) and inspect fuse. If fuse is okay, go to next step. If fuse is blown, go to step 12).
  11. Using scan tool in voltmeter mode, check voltage on fused battery voltage side of PDC engine control fuse socket. If voltage is more than 10 volts, repair open in Red wire on XJ and ZJ bodies or Red/White wire on YJ body between PDC engine control fuse socket and PCM connector terminal No. 3. If voltage is less than 10 volts, repair open in battery voltage side between PDC engine control fuse socket and battery.
  12. Turn ignition off. Disconnect Auto Shutdown (ASD) and fuel pump relays. Using scan tool in ohmmeter mode, check resistance of fused battery voltage circuit at PCM connector terminal No. 3 (Red wire on XJ and ZJ bodies or Red/White wire on YJ body). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground in fused battery voltage circuit.
  13. Using scan tool in ohmmeter mode, check resistance of ASD relay output circuit at ASD relay connector terminal "D" (Dark Green/Orange wire on XJ and YJ bodies or Dark Green/Black wire on ZJ body). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, go to TEST NS-6C  .
  14. Disconnect ignition coil connector. Using scan tool in ohmmeter mode, check resistance of ASD relay output circuit at ASD relay connector terminal "D" (Dark Green/Orange wire on XJ and YJ bodies or Dark Green/Black wire on ZJ body). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, replace ignition coil.
  15. Disconnect alternator field connector. Using scan tool in ohmmeter mode, check resistance of ASD relay output circuit at ASD relay connector terminal "D" (Dark Green/Orange wire on XJ and YJ bodies or Dark Green/Black wire on ZJ body). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair short to ground in alternator.
  16. Disconnect No. 1 fuel injector harness connector. Using scan tool in ohmmeter mode, check resistance of ASD relay output circuit at ASD relay connector terminal "D" (Dark Green/Orange wire on XJ and YJ bodies or Dark Green/Black wire on ZJ body). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, replace No. 1 fuel injector.
  17. Perform previous step for each additional fuel injector in order. After all injectors have been tested, if resistance is less than 5 ohms, repair short to ground in ASD relay output circuit.
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