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Test TC-61C - Injector No. 4 Control Circuit

NOTE: Perform TEST TC-61A before proceeding. For connector terminal IDENTIFICATION, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 2.4L article.
  1. Ensure ignition is off. Disconnect connector at injector No. 4. Injector No. 4 is second injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 3, but delivers fuel to cylinder No. 4, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 4.
  2. Using ohmmeter, check resistance between electrical terminals on injector No. 4. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
  3. Using ohmmeter, check resistance between terminal No. 2 (Light Blue/Brown wire) on connector for injector No. 4 and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown. Perform TEST VER-2A.
  4. Using ohmmeter, check resistance between ground and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Light Blue/Brown wire to injector No. 4. Perform TEST VER-2A.
  5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 4.
  6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
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