Throttle Position (TP) Sensor Inspection: Notes

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

This inspection procedure cannot be completed correctly if the accelerator pedal position sensor has a malfunction. Before performing this procedure, verify that any one of the DTCs (P2122, P2123, P2127, P2128, P2138) related to the accelerator pedal position sensor is not detected.

NOTE:

Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD .)

Verify that no DTC related to APP sensor has been detected.
- If any DTCs related to APP sensor have been detected, perform the DTC inspection. (See DTC TABLE .)
Connect the WDS or equivalent to the DLC-2.

Fig 1: Locating Data Link Connector (DLC-2)
Courtesy of MAZDA MOTORS CORP.
Turn the ignition switch to ON position.
Select TP1 or TP2 PID (percentage) on the WDS or equivalent.
Verify that the TP1 or TP2 PID is within the specification when the accelerator pedal not depressed. (See PCM INSPECTION .)
Operate the accelerator pedal and verify that the TP1 or TP2 PID (percentage) changes as shown in the following graph.
- If not verified, perform the Circuit Open/Short Inspection .
  - If there is no open or short circuit, replace the throttle body. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF] , INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3] .)
    
    Fig 2: Throttle Opening Angle & Output Voltage Reference Chart
    Courtesy of MAZDA MOTORS CORP.