Accelerator Pedal Position Sensor (APS)

Specifications

Specification

Description and Operation

Description

The Accelerator Position Sensor (APS) is installed on the accelerator pedal module and detects the accelerator pedal angle. The APS is one of the most important sensors in the engine control system, so it consists of two sensors that have individual sensor power and ground lines. The second sensor monitors the first sensor, and its output voltage is half of the first. If the ratio of sensor 1 and 2 is out of the allowable range (approximately 1/2), the diagnostic system judges it as abnormal.

Circuit Diagrams

Wiring Diagram

Repair Procedures

Inspection

1. 1

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

2. 2

   Start the engine and check the APS 1 and 2 output voltages at C.T and W.O.T.

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

   
   

   

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 mounting nuts (B), then remove the accelerator pedal module.

   Accelerator pedal module mounting nut:

   12,7–15.7 N·m

   

Installation

1. Install in the reverse order of removal.