Injector #1 Control Circuit
NOTE:
For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L V6
article in ENGINE PERFORMANCE.
- Turn ignition off. Disconnect 10-pin (FJ22 body) or 4-pin (JA body) injector harness connector. See Fig 1 or Fig 2. On FJ22 body, using an external ohmmeter, check resistance between 10-pin injector harness connector (injector side) Light Green/Black wire and Black/Red wire. On JA body, using an external ohmmeter, check resistance between 4-pin injector harness connector (injector side) White/Light Blue wire and Dark Green/Orange wire. On all models, if resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, go to TEST TC-26C.
- Move ohmmeter lead from Black/Red wire (FJ22 body) or Dark Green/Orange wire (JA body) to ground. If resistance is less than 5 ohms, repair short to ground in Light Green/Black wire (FJ22 body) or White/Light Blue wire (JA body). Perform TEST VER-2 . If resistance is more than 5 ohms, go to next step.
- Turn ignition on. Using scan tool, actuate ASD relay. Put scan tool in voltmeter mode. On FJ22 body, using scan tool, check voltage on 10-pin injector harness connector (PCM side) Black/Red wire. On JA body, using scan tool, check voltage on 4-pin injector harness connector (PCM side) Dark Green/Orange wire. If voltage is less than 10 volts, repair open in appropriate wire. Perform TEST VER-2. If voltage is more than 10 volts, go to next step.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Put scan tool in ohmmeter mode. Using scan tool, check resistance of PCM connector terminal No. 13 Light Green/Black wire (FJ22 body) or White/Light Blue wire (JA body). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground in appropriate wire. Perform TEST VER-2.
- On FJ22 body, using an external ohmmeter, check resistance of Light Green/Black wire between 10-pin injector harness connector (PCM side) and Powertrain Control Module (PCM) connector terminal No. 13. On JA body, using an external ohmmeter, check resistance of White/Light Blue wire between 4-pin injector harness connector (PCM side) and Powertrain Control Module (PCM) connector terminal No. 13.
- On all models, if resistance is more than 5 ohms, repair open in Light Green/Black wire (FJ22 body) or White/Light Blue wire (JA body). Perform TEST VER-2 . If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.