Throttle Position (TP) Sensor Inspection: Notes

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.

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 M-MDS to the DLC-2.
Turn the ignition switch to ON position.
Select TP1 or TP2 PID (percentage) on the M-MDS.
Verify that the TP1 or TP2 PID is within the specification when the accelerator pedal not depressed. (See PCM INSPECTION .)

Fig 1: Identifying Data Link Connector 2
Courtesy of MAZDA MOTORS CORP.
Operate the accelerator pedal and verify that the TP1 or TP2 PID (percentage) changes as shown in the following graph in illustration.
- 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 .)
    
    Fig 2: Throttle Position Sensor Voltage Graph
    Courtesy of MAZDA MOTORS CORP.