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Test TC-21F - Injector No. 1 Control Circuit

NOTE: Perform TEST TC-21A - INJECTOR CONTROL CIRCUIT  before proceeding. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
  1. Ensure ignition is off. Disconnect connector at injector No. 1. Injector No. 1 is the first injector back from front (timing belt end) of engine. It may be necessary to remove air intake plenum for access to connector at injector No. 1.
  2. Using ohmmeter, check resistance between electrical terminals on injector No. 1. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A - ROAD TEST VERIFICATION .
  3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on connector for injector No. 1.
  4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay to injector No. 1. Perform TEST VER-2A - ROAD TEST VERIFICATION . The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
  5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
  6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A - ROAD TEST VERIFICATION .
  7. Using ohmmeter, check resistance between terminal No. 1 (White/Dark Blue wire) on connector for injector No. 1 and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A - ROAD TEST VERIFICATION . If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A - ROAD TEST VERIFICATION .
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