Accelerator Pedal Position Sensor (APS)

Specifications

Specification

Description and Operation

Description

The accelerator position sensor (APS), installed on the accelerator pedal module, detects the angle of the accelerator pedal. Since the APS is one of the most important sensors in the engine control system, each of its two sensors has an independent power supply line and ground line. APS 2 monitors APS 1, and its output voltage is half that of APS 1. If the ratio between APS 1 and APS 2 goes outside the allowable range (approximately 1/2), the diagnostic system regards this as abnormal.

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Inspection

1. 1

   Connect the KDS to the Data Link Connector (DLC).

2. 2

   Turn the ignition switch ON.

3. 3

   Measure the output voltage of APS 1 and 2 at C.T. and W.O.T.

   Accelerator Position	Output Voltage (V) [Vref = 5 V]
   	VPA1	VPA2
   THA	0,7 - 0,8	0,33 - 0,43
   THW	3,99 - 4,23	1,94 - 2,18

Removal

1. 1

   Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

2. 2

   Disconnect the accelerator position sensor connector (A).

3. 3

   Remove the accelerator pedal position sensor (C) after loosening the mounting bolt and nut (B).

   Accelerator pedal position sensor mounting bolt:

   8,8–13.7 N·m

   

Installation

1. Install in the reverse order of removal.