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Home › Infiniti › 2003 › QX4 RWD › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P0121: Throttle Position Sensor - Range/Performance Problem › DTC Confirmation Test Malfunction "B" (Using Generic Scan Tool)

DTC Confirmation Test Malfunction "B" (Using Generic Scan Tool)

  1. Start engine and warm to normal operating temperature. Maintain following conditions for 10 consecutive seconds:
    • A/T in drive position or M/T in appropriate gear to drive vehicle uphill maintaining increased engine load for specified time period.
    • Engine speed of 2000 RPM or more.
    • Engine coolant temperature 158°F (70°C) or more.
    • Voltage between ground and ECM terminal No. 91 more than 3.2 volts.
  2. On scan tool, select MODE 7. If DTC is detected, go to DIAGNOSTIC PROCEDURE .
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