Chrysler Town, Dodge Caravan. Manual — part 346
• Instrument Panel
• Body Control Module
• Air Bag System Diagnostic Module
• Full ATC Display Head (if equipped)
• ABS Module
• Transmission Control Module
• Powertrain Control Module
• Travel Module
• SKIM
SYSTEM DIAGNOSIS
OPERATION
The PCM can test many of its own input and out-
put circuits. If the PCM senses a fault in a major
system, the PCM stores a Diagnostic Trouble Code
(DTC) in memory.
For DTC information see On-Board Diagnostics
(Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/POWERTRAIN CONTROL MOD-
ULE - DESCRIPTION) .
SPECIFICATIONS
TORQUE
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
MAP SENSOR PLASTIC
MANIFOLD
1.7
15
MAP SENSOR
ALUMINUM MANIFOLD
3.3
30
POWER STEERING
RESERVOIR PLASTIC
MANIFOLD
5.7
50
POWER STEERING
RESERVOIR ALUMINUM
MANIFOLD
11.9
105
THROTTLE CABLE
BRACKET PLASTIC
MANIFOLD
5.7
50
THROTTLE CABLE
BRACKET ALUMINUM
MANIFOLD
11.9
105
EGR TUBE PLASTIC
MANIFOLD
5.7
50
EGR TUBE ALUMINUM
MANIFOLD
11.9
105
THROTTLE BODY BOLTS
2.4L
28
20.65
250 ±50
THROTTLE BODY BOLTS
3.3/3.8L
11.8
8.7
105 ±20
O2 Sensors
27
20
The composite manifolds uses special Plastic screws. The factory installed Plastic screws can be removed and
installed up to 5 times. Do not exceed the specified torque. These screws must be installed slowly (less than 600
rpms) to avoid melting the parent material. There are service repair screws avialable for repair. They require a
higher torque than the original screws..
14 - 22
FUEL INJECTION
RS
FUEL INJECTION (Continued)
SPECIAL TOOLS
FUEL
ACCELERATOR PEDAL
REMOVAL
(1) Hold the throttle body throttle lever in the
wide open position. Remove the throttle cable from
the throttle body cam (Fig. 1).
(2) From inside the vehicle, hold up the pedal and
remove the pedal retainer and throttle cable from the
upper end of the pedal lever (Fig. 2).
(3) Remove nuts from accelerator pedal attaching
studs. Remove assembly from vehicle (Fig. 3).
Pressure Gauge Assembly C–4799–B
Fuel Pressure Test Adapter 6539
Spanner Wrench 6856
Fuel Line Adapter 1/4
O2S (Oxygen Sensor) Remover/Installer—C-4907
O2S (Oxygen Sensor) Remover/Installer - 8439
Fig. 1 THROTTLE CABLE RELEASE
RS
FUEL INJECTION
14 - 23
FUEL INJECTION (Continued)
INSTALLATION
(1) Position accelerator pedal assembly on dash
panel. Install retaining nuts. Tighten retaining nuts
to 12 N·m (105 in. lbs.) torque (Fig. 3).
(2) From inside the vehicle, hold up the pedal and
install the throttle cable and pedal retainer in the
upper end of the pedal lever (Fig. 2).
(3) From the engine compartment, hold the throt-
tle body lever in the wide open position and install
the throttle cable (Fig. 1).
CRANKSHAFT POSITION
SENSOR
DESCRIPTION
The 2.4L crankshaft sensor is located on the rear
of the engine near the accessory drive belt (Fig. 4).
The 3.3/3.8L crankshaft sensor is located on the rear
of the transmission housing, above the differential
housing (Fig. 5). The bottom of the sensor is posi-
tioned next to the drive plate.
OPERATION
The crankshaft position sensor detects slots cut
into the transmission driveplate extension (Fig. 6).
There are 3 sets of slots. Each set contains 4 slots,
for a total of 12 slots (Fig. 7). Basic timing is set by
the position of the last slot in each group. Once the
Powertrain Control Module (PCM) senses the last
slot, it determines crankshaft position (which piston
will next be at TDC) from the camshaft position sen-
sor input. The 4 pulses generated by the crankshaft
position sensor represent the 69°, 49°, 29°, and 9°
BTDC marks. It may take the PCM one engine rev-
olution to determine crankshaft position.
The PCM uses crankshaft position reference to
determine injector sequence, ignition timing and the
presence of misfire. Once the PCM determines crank-
shaft position, it begins energizing the injectors in
sequence.
Fig. 2 CABLE CLIP AND GROMMET
1 - Retainer Clip
2 - Grommet
3 - Cable Assembly
4 - Cable Retainer
5 - Dash Panel
6 - Grommet
Fig. 3 ACCELERATOR PEDAL AND THROTTLE
CABLE
1 - Grommet
2 - Cable
3 - Pedal Shaft and Bracket
4 - Seal
5 - Dash Panel
6 - Cable Assembly
Fig. 4 CRANKSHAFT SENSOR 2.4L
14 - 24
FUEL INJECTION
RS
ACCELERATOR PEDAL (Continued)
REMOVAL
(1) Disconnect the negative battery cable.
(2) Raise vehicle and support.
(3) Disconnect the electrical connector (Fig. 8).
(4) Remove crankshaft sensor bolt (Fig. 9).
(5) Remove the crankshaft sensor.
INSTALLATION - 2.4L
(1) Install the crankshaft sensor.
(2) Install crankshaft sensor bolt and tighten.
(3) Connect the electrical connector (Fig. 8).
(4) Lower vehicle.
(5) Connect the negative battery cable.
ENGINE SPEED SENSOR
DESCRIPTION
The PCM receives a signal from the TCM to indi-
cate vehicle speed on automatic transmission cars.
On 4 cylinder Manual transmission cars (if equipped)
vehicle, a dedicated vehicle speed sensor is connected
Fig. 5 CRANKSHAFT SENSOR 3.3/3.8L
Fig. 6 Crankshaft Position Sensor
1 - CRANKSHAFT POSITION SENSOR
Fig. 7 Timing Slots
1 - TORQUE CONVERTER DRIVE PLATE
2 - SLOTS
Fig. 8 CRANKSHAFT SENSOR 2.4L
RS
FUEL INJECTION
14 - 25
CRANKSHAFT POSITION SENSOR (Continued)
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