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Home >> Infiniti >> 2016 >> QX50 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnostic Trouble Codes (DTCS) (P0011-P0445) >> DTC/Circuit Diagnosis >> DTC P0122, P0123, P0227, P0228: Throttle Position Sensor Circuit Low/High Input >> Component Inspection >> Diagnostic Test
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Diagnostic Test

  1. CHECK THROTTLE POSITION SENSOR

    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Perform DESCRIPTION .
    4. Turn ignition switch ON.
    5. Set selector lever to D position.
    6. Check the voltage between ECM harness connector terminals under the following conditions:
      ECM  
      Condition
      Voltage (V)
      Connector + -
      Terminal Terminal
      F101 30 [TP sensor 1 (bank 1)] 40 Accelerator pedal Fully released More than 0.36
      Fully depressed Less than 4.75
      31 [TP sensor 1 (bank 2)] 48 Fully released More than 0.36
      Fully depressed Less than 4.75
      34 [TP sensor 2 (bank 1)] 40 Fully released Less than 4.75
      Fully depressed More than 0.36
      35 [TP sensor 2 (bank 2)] 48 Fully released Less than 4.75
      Fully depressed More than 0.36

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 2  .

  2. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

    1. Replace malfunctioning electric throttle control actuator. Refer to REMOVAL AND INSTALLATION .
    2. Go to SPECIAL REPAIR REQUIREMENT .

    INSPECTION END