A list of check need to be done to determine if its for real the PCM or wiring or injectors
INJECTOR CONTROL CIRCUIT
1. On 3.3L except flex-fuel and 3.8L, ensure ignition is off. Disconnect connector at injector No. 1.
NOTE: Injector No. 1 is first injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 2, but delivers fuel to cylinder No. 1, due to crossflow intake manifold.
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.
3. 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. 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. 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.
7. Using ohmmeter, check resistance between terminal No. 2 (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
If resistance is less than 5 ohms, replace PCM
Sunday, October 26th, 2008 AT 7:06 PM