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P0122-THROTTLE POSITION SENSOR 1 CIRCUIT LOW (5.7L) (CONTINUED) 3. (F855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the Throttle Body harness connector. Ignition on, engine not running. Measure the voltage on the (F855) 5-volt Supply circuit in the Throttle Is the voltage between 4.8 to 5.2 volts? Yes >> Go To 4 No >> Go To 7 4. THROTTLE POSITION SENSOR With a scan tool, monitor the TP Sensor No.1 voltage with the Sensor harness connector disconnected. Is the voltage above 4.5 volts? Yes >> Disconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assem- bly. After installation is complete, using a scan tool select the ETC RELEARN function. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 5 5. (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K22) TP Sensor Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (K22) TP Sensor No.1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 6 9 - 126 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |