DTC P0622: Generator F-Terminal Circuit: Testing

If diagnostic system check was not performed, go to ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK . After diagnostic system check is performed, go to next step.
Install a scan tool. Start the engine. With a scan tool, observe the GEN - F TERMINAL PARAMETER in the PCM data list. Does the scan tool indicate that the GEN - F TERMINAL PARAMETER is within the specified range of 5-95 percent? If so, go to next step. If not, go to step 4 .
With the scan tool command the generator OFF. Does the GEN - F Terminal equal the specified value of 0 percent? If so, go to INTERMITTENTS . If not, go to next step.
Turn OFF the ignition. Disconnect the generator connector. Connect test light to battery positive voltage. Turn ON the ignition, with the engine OFF. Probe the F-Terminal in the generator connector. Observe the GEN - F TERMINAL SIGNAL PARAMETER in the PCM data list. Is the GEN - F TERMINAL SIGNAL PARAMETER near the specified value of 100 percent? If so, perform TEST A: CHARGING SYSTEM TEST . If not, go to next step.
Test the generator field duty cycle signal circuit for a short or open. Did you find and correct the condition? If so, go to step 8 . If not, go to next step.
Inspect for poor connections at the harness connector of the PCM. Did you find and correct the condition? If so, go to step 8 . If not, go to next step.
Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE . After repair, go to next step.
Review and record the scan tool Fail Records data. Clear any DTCs. Operate the vehicle within the Fail Records conditions as noted. Using a scan tool, monitor the SPECIFIC DTC INFO for this DTC. Does the scan tool indicate that this DTC failed this ignition? If so, go to step 2 . If not, system is okay.