Test TC-19A - Injector No. 3 Control Circuit

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION Directory. For wiring diagram, see WIRING DIAGRAMS article.

If vehicle is a 4-cylinder engine, perform TEST TC-19E. If vehicle is a V6 engine, go to next step.
Turn ignition off. Disconnect injector harness 4-pin connector. Using an external ohmmeter, check resistance on injector harness connector (PCM side) between Yellow/White wire and Dark Green/Orange wire. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, perform TEST TC-19B.
Move ohmmeter lead from Dark Green/Orange wire to ground. Observe ohmmeter reading. If ohmmeter reading is 5 ohms or more, go to next step. If ohmmeter reading is less than 5 ohms, repair short to ground on injector No. 3 driver circuit Yellow/White wire. Perform TEST VER-2A.
Turn ignition on. Using scan tool, actuate ASD relay. Using scan tool in voltmeter mode, check voltage on injector connector (PCM side) ASD relay output circuit Dark Green/Orange wire. If voltage cycles high and low, go to next step. If voltage does not cycle high and low, repair open Dark Green/Orange wire. Perform TEST VER-2A.
Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance on PCM connector terminal No. 7 (injector No. 3 driver circuit) Yellow/White wire. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on injector No. 3 driver circuit. Perform TEST VER-2A.
Using an external ohmmeter, check resistance of injector No. 3 driver circuit, Yellow/White wire between injector connector (PCM side) and PCM connector terminal No. 7. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open injector driver No. 3 circuit. Perform TEST VER-2A.