Dodge Neon / Neon SRT-4. Manual — part 286
(3) From inside the vehicle, hold up the pedal and
remove the cable retainer and throttle cable from the
upper end of the pedal shaft (Fig. 2).
(4) Pull back the carpet.
(5) Working from inside the vehicle, remove nuts
from accelerator pedal attaching studs (Fig. 3).
Remove assembly from vehicle.
INSTALLATION
CAUTION: When servicing the accelerator pedal,
throttle cable or speed control cable, do not dam-
age or kink the core wire inside the cable sheath-
ing.
(1) Position accelerator pedal assembly on dash
panel. Install retaining nuts. Tighten retaining nuts
to 12 N·m (105 in. lbs.) torque.
(2) From inside the vehicle, hold up the pedal and
install the throttle cable and cable retainer in the
upper end of the pedal shaft.
(3) From the engine compartment, hold the throt-
tle body lever in the wide open position and install
the throttle cable.
(4) Install the throttle cable cover.
ACCELERATOR PEDAL
POSITION SENSOR
DESCRIPTION
The Accelerator Pedal Position Sensor (APPS) is a
variable resistor that provides the PCM with an
input signal (voltage) (Fig. 4). The signal represents
throttle blade position. As the position of the acceler-
ator pedal changes, the resistance of the APPS
changes (Fig. 5).
Fig. 2 Accelerator Pedal and Throttle Cable
Fig. 3 Accelerator Pedal
Fig. 4 APPS MODULE
14 - 26
FUEL INJECTION
PL/SRT-4
ACCELERATOR PEDAL (Continued)
REMOVAL
REMOVAL - RHD
(1) Disconnect the negative battery cable.
(2) Remove the 2 bracket mounting bolts (Fig. 6).
(3) Remove the 2 bolts holding module to the
mounting bracket
(4) Unlock the electrical connector and then dis-
connect the electrical connector from the module (Fig.
7).
(5) Open the APPS module cover and disconnect
the cable from the cam and module.
(6) Remove assembly.
REMOVAL - LHD
(1) Disconnect the negative battery cable.
(2) Remove the 2 mounting bolts (Fig. 8).
(3) Open APPS module and disconnect the cable
(Fig. 9).
(4) Remove APPS module.
INSTALLATION
INSTALLATION - RHD
(1) Open APPS module and connect cable.
Fig. 5 ASSP MODULE OPEN
Fig. 6 APPS MOUNTING
1 - MODULE MOUNTING BOLTS
2 - BRACKET MOUNTING BOLTS
Fig. 7 ELECTRICAL CONNECTOR LOCK
Fig. 8 APPS LOCATION
PL/SRT-4
FUEL INJECTION
14 - 27
ACCELERATOR PEDAL POSITION SENSOR (Continued)
(2) Route electrical connector though mounting
bracket (Fig. 10).
(3) Install electrical connector and lock (Fig. 11).
(4) Install the 2 top bolts (Fig. 6).
(5) Install the 2 mounting bolts (Fig. 6).
(6) Connect the negative battery cable.
INSTALLATION - LHD
(1) Open APPS module and connect the cable (Fig.
12).
(2) Install APPS module.
(3) Tighten the 2 mounting bolts (Fig. 12).
(4) Connect the negative battery cable.
Fig. 9 APPS MOUNTING
Fig. 10 APPS AND CABLE RHD
Fig. 11 ELECTRICAL CONNECTOR
14 - 28
FUEL INJECTION
PL/SRT-4
ACCELERATOR PEDAL POSITION SENSOR (Continued)
CRANKSHAFT POSITION
SENSOR
DESCRIPTION
The crankshaft position sensor mounts to the
engine block near the starter (Fig. 13).
The PCM uses the Crankshaft Position sensor to
calculate the following:
• Engine RPM
• TDC number 1 and 4
• Ignition coil synchronization
• Injector synchronization
• Camshaft-to-crankshaft misalignment (Timing
belt skipped 1 tooth or more diagnostic trouble code).
OPERATION
The PCM sends approximately 5 volts to the Hall-
effect sensor. This voltage is required to operate the
Hall-effect chip and the electronics inside the sensor.
A ground for the sensor is provided through the sen-
sor return circuit. The input to the PCM occurs on a
5 volt output reference circuit that operates as fol-
lows: The Hall-effect sensor contains a powerful mag-
net. As the magnetic field passes over the dense
portion of the counterweight, the 5-volt signal is
pulled to ground (.3 volts) through a transistor in the
sensor. When the magnetic field passes over the
notches in the crankshaft counterwieght, the mag-
netic field turns off the transistor in the sensor, caus-
ing the PCM to register the 5-volt signal. The PCM
identifies crankshaft position by registering the
change from 5 to 0 volts, as signaled from the Crank-
shaft Position sensor.
The PCM determines what cylinder to fire from the
crankshaft position sensor (Fig. 14) input and the
camshaft position sensor input. The #8 crankshaft
counterweight has a target ring with 32 teeth and
notches, including one long referance tooth and
notch. From the crankshaft position sensor input the
PCM determines engine speed and crankshaft angle
(position).
Fig. 12 APPS AND CABLE LHD
Fig. 13 Crankshaft Position Sensor
PL/SRT-4
FUEL INJECTION
14 - 29
ACCELERATOR PEDAL POSITION SENSOR (Continued)
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