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Check reference values between ECM terminals and ground under the following conditions: ECM TERMINAL NO. ITEM CONDITION DATA (DC VOLTAGE) 32 Regulated sensor supply 2 Ignition switch: ON - Approximately 5 V 38 Electronic throttle control actuator (position sensor) • Engine stopped • Accelerator pedal: 4.24 V • Engine stopped • Accelerator pedal: 0.72 V 54 Electronic throttle control actuator • Engine stopped • Accelerator pedal: 0.74 V • Engine stopped • Accelerator pedal: 4.62 V 64 Motor 4 - 12 V or 0 V 65 Motor 3 66 Motor 2 12 V or 0 V 67 Motor 1 78 Sensor (GND) Approximately 0 V On Board Diagnostic Logic DTC NO. DTC DEFINITION DTC DETECTION CONDITION DTC SET CONDITION POSSIBLE CAUSE P0123 Throttle position sensor A circuit high input • Ignition switch: • Engine: Running Signal output is • TPS or • Harness or • ECM DTC Confirmation Procedure: Before performing the following procedure, confirm that battery voltage is more than 12 V. • Turn ignition switch off. • Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available. • Turn ignition switch on. • With the scan tool, record and erase stored DTCs in the ECM. • Start engine and warm it to normal operating temperature, then select view DTC and data stream. • If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1. • If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou- bleshooting in Section 03 Electronic Engine Controls for more information. NOTE : DIAGNOSIS & TESTING 03
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