Table of Contents
Advertisement
Symptom:
*CHECKING THE ACCELERATOR PEDAL POSITION SENSOR
CALIBRATION
APP SENSOR IDLE VOLTAGE
APP SENSOR WIDE OPEN THROTTLE VOLTAGE
VERIFY APP SENSOR OPERATION
TEST
1
NOTE: The APP Sensor is a device that contains 2 separate potentiometer
type sensors. Each sensor receives it's own 5-volt supply circuit, sensor
ground circuit and signal circuit. The APP Sensor no longer incorporates a
low-idle switch.
NOTE: The APP Sensor #2 signal should always be 1/2 the voltage as the APP
Sensor #1 signal
Turn the ignition on.
With the DRB, read the APP Sensor #1 and APP Sensor #2 Volts with the accelerator
pedal in the at rest position.
Does the DRB display between 0.50 and 0.90 volt for sensor #1 and 1/2 the #1 voltage
for #2?
Yes → Go To 2
→ Replace the Accelerator Pedal Position Sensor.
No
2
Turn the ignition on.
Fully depress the accelerator pedal.
With the DRB, read the voltage for APP Sensor #1 and APP Sensor #2.
Does the DRB display between 4.0 and 4.5 volts for #1 and 1/2 #1 voltage for #2?
Yes → Go To 3
→ Replace the Accelerator Pedal Position Sensor.
No
3
Turn the ignition on.
With the DRB, read the APP Sensor #1 and APP Sensor #2 percentages (%).
With the accelerator pedal in the idle position, slowly depress the accelerator pedal
until the pedal is fully depressed.
NOTE: The percentage readings for APP Sensor #1 and #2 should increase
smoothly as the pedal is depressed.
Does the percentage increase smoothly for both readings with the accelerator pedal
travel?
Yes → Test Complete.
→ Replace the Accelerator Pedal Position Sensor.
No
POSSIBLE CAUSES
ACTION
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
217
APPLICABILITY
All
All
All
Advertisement
Table of Contents
