rewnne ‘Accelerator Pedal r Levar Position Sensor
General Information
The accelerator pedal or lever position sensor will vary with
OEM. Refer to the vehicle manufacturer's manual for the
specific troubleshooting and repair procedures. This section
contains troubleshooting and repair procedures for one
typical accelerator pedal or lever position sensor.
The accelerator pedal or lever position sensor sends a signal 8
to the ECM when the operator pushes on the accelerator
pedal or lever. The accelerator position circuit consists of the
accelerator pedal or lever position sensor, the ECM,
accelerator pedal/lever position +5 volt, accelerator
pedal/lever position signal, and accelerator pedallever
position return wires.
Resistance Check
if an electronic service tool is available, monitor the
accelerator position sensor for proper operation. If not,
follow the troubleshooting procedures in this section.
Disconnect the 3-pin connector from the accelerator position
sensor.
Connect the test connector.
Connect the multimeter positive (+) test lead to the
accelerator pedal/lever position +5 volt supply test connector
wire. Connect the negative (-) multimeter test probe to the
accelerator pedal/lever position return test connector wire.
Measure the resistance. The multimeter must show between
2000 and 3000 ohms when the accelerator pedal is released
(idle position) or depressed (full-fuel position)
If the resistance is not within the specification, the
accelerator position sensor has failed. Replace the
accelerator position sensor. Refer to the OEM
troubleshooting and repair manual for the procedures.
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Remove the multimeter probe from the accelerator ee
pedal/lever position +5 volt supply test connector wire and ena
connect it to the accelerator pedal/lever position signal test WP oP
connector wire. ‘ 3
When the accelerator pedal is in the released (idle) position,
measure the resistance. The multimeter must show between ~
1500 and 3000 ohms.
Depress the accelerator pedal assembly (full-fuel position)
and measure the resistance. The multimeter must show
between 250 and 1500 ohms. This resistance value must be y :
at least 1000 ohms lower than the resistance value of 1500 . 3
to 3000 ohms measured in the above check. If the : %
resistance values in the two previous steps are not within ~~ e,
the specification, the accelerator position sensor has failed
Replace the accelerator position sensor according to the
vehicle manufacturer's procedures. If the resistance values
are within the specifications, the accelerator position sensor
must still be checked for a short circuit to ground.
Check for Short Circuit to Ground
Connect the multimeter positive (+) probe to the accelerator eee
pedal/lever position return test connector wire. Touch the ome ES
negative (-) multimeter probe to the chassis ground and
measure the resistance.
The multimeter must show an open circuit (100k ohms or
more). & so
Remove the multimeter positive (+) probe from accelerator rat
pedal/lever position return test connector wire and connect it
to the accelerator pedal/lever position signal test connector 4
wire, Measure the resistance, -
The multimeter must show an open circuit (100k ohms or >)
more) A aan
Remove the multimeter positive (+) probe from the
accelerator pedal/lever position signal test connector wire
and connect it to the accelerator pedal/lever position +5 volt
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supply test connector wire. Measure the resistance. The eo
multimeter must show an open circuit (100k ohms or more). Ca
If the resistance values are not within the specifications in
the previous check, the accelerator position sensor has
failed. Replace the accelerator position sensor according to Z
the vehicle manufacturer's procedures. e “
If the accelerator position sensor has passed all the previous
checks, connect the sensor to the wiring harness. The
accelerator position sensor circuit must still be checked
Last Modified: 29-Jun-2015
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