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P0121-THROTTLE POSITION SENSOR 1 PERFORMANCE (CONTINUED) 10. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 11. THROTTLE FOLLOWER TEST Ignition on, engine not running. With a scan tool, perform the Throttle Follower Test and monitor the TP Sensor No.1 or No.2 voltage. Slowly press the throttle pedal down. The voltage for TP Sensor No.1 should start at approximately 0.3 of a volt and increase to above 4.7 volts. The voltage for TP Sensor No.2 should start at approximately 4.7 volts and decrease to approximately 0.3 of a volt. Is the voltage within the range of the listed specification for the appropriate Sensor? Yes >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Disconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assem- bly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 118 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |