LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2006 >> Epica LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.0L (L34 GMDAT) - DTC P0137 To DTC P1171 >> DTC P1121 or P1122 >> Circuit/System Testing

Circuit/System Testing

  1. Start the engine, observe the throttle position (TP) sensor parameter while moving the harness connector of the sensor. The TP sensor parameter should not change abruptly.
    • If the TP sensor parameter changes abruptly, repair the harness connector of the TP sensor.
  2. Engine running, observe the TP sensor parameter while moving the harness connector of the ECM. The TP sensor parameter should not change abruptly.
    • If the TP sensor parameter changes abruptly, repair the harness connector of the ECM.
  3. Engine running, observe the TP sensor parameter while moving the wiring harness between the sensor and ECM. The TP sensor parameter should not change abruptly.
    • If the TP sensor parameter changes abruptly, repair the wiring harness.
scientia non olet · About LEMON Manuals