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Home >> Dodge and Ram >> 1998 >> Durango 5.9 Z, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Engine Performance >> Self-Diagnostic Tests >> Test TC-21B: Injector #1 Control Circuit
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Test TC-21B: Injector #1 Control Circuit

NOTE: Perform TEST TC-21A: INJECTOR CONTROL CIRCUITS  before proceeding. For connector terminal identification, see CONNECTOR IDENTIFICATION . For component location and wiring diagram, see WIRING DIAGRAMS article.
  1. Turn ignition off. Disconnect injector No. 1 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A: ROAD TEST VERIFICATION . If connector and terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance across injector No. 1 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A: ROAD TEST VERIFICATION . If resistance is 10-16 ohms, go to next step.
  3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using an external voltmeter, check voltage on injector No. 1 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If voltage cycles from high voltage to low voltage, go to next step.
  4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A: ROAD TEST VERIFICATION . If connectors and terminals are okay, go to next step.
  5. Using an external ohmmeter, check resistance between ground and PCM White connector, injector No. 1 driver circuit (White/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 1 driver circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If resistance is 5 ohms or more, go to next step.
  6. Check resistance of injector No. 1 driver circuit (White/Dark Blue wire) between injector No. 1 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 1 driver circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A: ROAD TEST VERIFICATION .
NOTE: A break in test sequence occurs at this point. Sequence skips from TEST TC-21B to TEST TC-25A. No tests have been omitted.
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