LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 403 (Engine Control System) >> DTC P2138: App Sensor >> Diagnostic Procedure >> 3. Check App Sensor Ground Circuit For Open And Short
April 5, 2026: LEMON Manuals is launched! Read the announcement.

3. Check App Sensor Ground Circuit For Open And Short

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between the following;

    electric throttle control actuator terminal 9 and ECM terminal 89.

    electric throttle control actuator terminal 12 and ECM terminal 100

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  4. Also check harness for short to ground and short to power.

OK or NG 

  1. OK: GO TO 5. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT .
  2. NG: GO TO 4.