Accelerator Position Sensor (APS)

Specifications

SPECIFICATIONS

Description and Operation

Description

The accelerator pedal position sensor (APS) is attached to the accelerator pedal module and detects the angle of the accelerator pedal. Since the APS is one of the most important sensors in engine control, it is designed with two sensors, each with separate power and ground lines. The second sensor monitors the first sensor, and its output voltage is approximately half that of the first. If the ratio between sensors 1 and 2 falls outside the permissible range (approximately half), the diagnostic system detects a malfunction.

Schematic diagrams

Circuit diagram

repair procedures

TEST

1. 1

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

2. 2

   Turn the ignition switch on:

3. 3

   Check APS 1 and 2 output voltage for open circuit and throttle valve fully closed.

   ACCELERATOR POSITION	Output Voltage (V) [Vref = 5 V]
   	VPA1	VPA2
   Idle	0,7~0,8	0,32 - 0,42
   THW	3,98 - 4,22	1,93~2,17

   
   

   

expansion

1. 1

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

2. 2

   Disconnect the accelerator pedal position sensor connector (A).

3. 3

   Loosen the mounting bolt (C) and nuts (B), then remove the accelerator pedal module.

   Accelerator pedal module mounting nut:

   12,7~15.7 N·m

   Accelerator pedal module mounting bolt:

   8,8~13.7 N·m

   

Installation

1. Installation is the reverse of removal.