Dodge Dakota (R1). Manual - part 565

(8) Verify Crankcase Ventilation (CCV) system

operation. Verify CCV system hoses and fixed orifice
fitting are firmly connected (Fig. 16). Refer to 25,
Emission Control System for additional information.

(9) Inspect fuel tube quick-connect fitting-to-fuel

rail connections.

(10) Verify hose connections to all ports of vacuum

fittings on intake manifold are tight and not leaking.

(11) Inspect accelerator cable and throttle cable.

Check their connections to throttle arm of throttle
body for any binding or restrictions.

(12) If equipped with vacuum brake booster, verify

vacuum booster hose is firmly connected to fitting on
intake manifold. Also check connection to brake vac-
uum booster.

(13) Inspect air cleaner inlet and air cleaner ele-

ment for dirt or restrictions.

(14) Inspect radiator grille area, radiator fins and

air conditioning condenser for restrictions.

(15) Verify intake manifold air temperature sensor

wire connector is firmly connected to harness connec-
tor (Fig. 17).

(16) Verify MAP sensor electrical connector is

firmly connected to MAP sensor (Fig. 18). Also verify
rubber L-shaped fitting from MAP sensor to throttle
body is firmly connected.

(17) Verify fuel injector wire harness connectors

are firmly connected to injectors in the correct order.
Each harness connector is numerically tagged with
injector number (INJ 1, INJ 2 etc.) of its correspond-
ing fuel injector and cylinder number.

(18) Verify harness connectors are firmly con-

nected to idle air control (IAC) motor, throttle posi-

Fig. 16 CCV System—2.5L Engine

1 - FIXED ORIFICE FITTING
2 - AIR INLET FITTING
3 - CCV TUBE
4 - CCV TUBE

Fig. 17 Intake Manifold Air Temperature Sensor—

2.5L Engine

1 - FUEL PRESSURE TEST PORT
2 - ELECTRICAL CONNECTOR
3 - INTAKE MANIFOLD AIR TEMPERATURE SENSOR
4 - FUEL INJECTOR

Fig. 18 Sensor Location—2.5L Engine

1 - IDLE AIR CONTROL MOTOR
2 - IAT SENSOR
3 - THROTTLE BODY
4 - THROTTLE POSITION SENSOR
5 - MAP SENSOR
6 - IDLE AIR CONTROL PASSAGE INLET
7 - THROTTLE BODY MOUNTING BOLTS (4)

14 - 32

FUEL INJECTION

FUEL INJECTION (Continued)

tion sensor (TPS) and manifold absolute pressure
(MAP) sensor (Fig. 18).

(19) Verify wire harness connector is firmly con-

nected to engine coolant temperature sensor (Fig.
19).

(20) Raise and support the vehicle.
(21) Verify both upstream and downstream oxygen

sensor wire connectors are firmly connected to sen-
sors. Inspect sensors and connectors for damage (Fig.
20) or (Fig. 21).

(22) Inspect for pinched or leaking fuel tubes.

Inspect for pinched, cracked or leaking fuel hoses.

(23) Inspect for exhaust system restrictions such

as pinched exhaust pipes, collapsed muffler or
plugged catalytic convertor.

(24) Verify electrical harness is firmly connected to

rear wheel speed sensor. Verify rear wheel speed sen-
sor is firmly attached to rear axle with proper air
gap. Refer to 5, Brakes for information.

(25) If equipped with 4–wheel antilock brake sys-

tem, verify electrical harness is firmly connected to
each front wheel speed sensor. Verify both front
wheel speed sensors are firmly attached. Refer to 5,
Brakes for information.

(26) Verify fuel pump/gauge sender unit wire con-

nector is firmly connected to harness connector.

(27) Inspect fuel hoses at fuel pump/gauge sender

unit for cracks or leaks.

(28) Inspect clutch housing for damage to timing

ring on drive plate/flywheel.

(29) Verify battery cable and solenoid feed wire

connections to the starter solenoid are tight and
clean. Inspect for chaffed wires or wires rubbing
against other components.

Fig. 19 Engine Coolant Temperature Sensor—2.5L

Engine

1 - THERMOSTAT HOUSING
2 - ENGINE COOLANT TEMPERATURE SENSOR
3 - ELECTRICAL CONNECTOR

Fig. 20 Upstream Oxygen Sensor—2.5L Engine

1 - UPSTREAM OXYGEN SENSOR
2 - EXHAUST PIPE

Fig. 21 Downstream Oxygen

1 - DOWNSTREAM OXYGEN SENSOR
2 - FRAME RAIL
3 - CATALYTIC CONVERTER

FUEL INJECTION

14 - 33

FUEL INJECTION (Continued)

SPECIFICATIONS

SPECIFICATIONS - TORQUE

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Engine Coolant Temperature Sensor—All Engines

IAC Motor-To-Throttle Body Bolts

Intake Manifold Air Temp. Sensor—All Engines

MAP Sensor Mounting Screws—All Engines

Oxygen Sensor—All Engines

Power Steering Pressure Switch

14-22

124-195

Powertrain Control Module Mounting Screws

3-5

30-40

Throttle Body Mounting Bolts—2.5L Engine

100

Throttle Body Mounting Bolts—3.9L/5.2L Engines

200

Throttle Position Sensor Mounting Screws—All

Engines

ACCELERATOR PEDAL

REMOVAL

All engines are equipped with torsion return

springs located on the throttle body shaft. 3.9L V-6
and 5.2/5.9L V-8 engines equipped with a manual
transmission have an additional pedal return spring
on the throttle body linkage.

CAUTION: Be careful not to damage or kink the
cable core wire (within the cable sheathing) while
servicing accelerator pedal or cables.

(1) From inside the vehicle, hold up accelerator

pedal. Remove plastic cable retainer and throttle
cable core wire from upper end of pedal arm (Fig.
22). Plastic cable retainer snaps into pedal arm.

(2) Remove two accelerator pedal/bracket nuts

(Fig. 22)and remove pedal/bracket assembly from
vehicle.

INSTALLATION

All engines are equipped with torsion return

springs located on the throttle body shaft. 3.9L V-6
and 5.2/5.9L V-8 engines equipped with a manual
transmission have an additional pedal return spring
on the throttle body linkage.

(1) Position pedal/bracket assembly over the two

dash panel mounting studs and install retaining
nuts.

(2) Tighten nuts to 7 N·m (65 in. lbs.) torque.
(3) From inside the vehicle, hold up the accelerator

pedal. Install the throttle cable core wire and plastic
cable retainer into the upper end of the pedal arm.
The plastic retainer is snapped into the pedal arm.

Fig. 22 Accelerator Pedal—Removal or Installation

1 - PINCH SIDES
2 - CABLE
3 - CABLE RETAINER
4 - NUTS (2)
5 - ACCELERATOR PEDAL

14 - 34

FUEL INJECTION

FUEL INJECTION (Continued)

When installing the plastic retainer to the accelera-
tor pedal arm, note the index tab on the pedal arm
(Fig. 23). Align the index slot (Fig. 23) on the plastic
cable retainer to this index tab.

CRANKSHAFT POSITION
SENSOR

DESCRIPTION - 2.5L

The Crankshaft Position (CKP) sensor is located

near the outer edge of the flywheel (or starter
ringear).

DESCRIPTION - 3.9L

The Crankshaft Position (CKP) sensor is located

near the outer edge of the flywheel (starter ringear).

DESCRIPTION - 5.2L/5.9L

The Crankshaft Position (CKP) sensor is located

near the outer edge of the flywheel (starter ringear).

DESCRIPTION - 4.7L

The Crankshaft Position Sensor (CKP) is mounted

into the right-rear side of the engine block (Fig. 24).

OPERATION - 2.5L

Engine speed and crankshaft position are provided

through the CKP sensor. The sensor generates pulses
that are the input sent to the Powertrain Control
Module (PCM). The PCM interprets the sensor input
to determine the crankshaft position. The PCM then
uses this position, along with other inputs, to deter-
mine injector sequence and ignition timing.

The sensor is a hall effect device combined with an

internal magnet. It is also sensitive to steel within a
certain distance from it.

The flywheel/drive plate has groups of four notches

at its outer edge. On 2.5L 4-cylinder engines there
are two sets of notches (Fig. 25).

The notches cause a pulse to be generated when

they pass under the sensor. The pulses are the input
to the PCM. For each engine revolution there are two
groups of four pulses generated on 2.5L 4-cylinder
engines.

The trailing edge of the fourth notch, which causes

the pulse, is four degrees before top dead center
(TDC) of the corresponding piston.

The engine will not operate if the PCM does not

receive a CKP sensor input.

OPERATION - 3.9L

Engine speed and crankshaft position are provided

The sensor is a hall effect device combined with an

internal magnet. It is also sensitive to steel within a
certain distance from it.

The flywheel/drive plate has groups of notches at

its outer edge. On 3.9L V-6 engines, there are three

Fig. 23 Index Tab and Slot

1 - INDEX TAB
2 - INDEX SLOT
3 - CABLE RETAINER
4 - PEDAL ARM

Fig. 24 CKP Sensor Location—4.7L V–8 Engine

1 - CRANKSHAFT POSITION SENSOR
2 - MOUNTING BOLT

FUEL INJECTION

14 - 35

ACCELERATOR PEDAL (Continued)

Content .. 563 564 565 566 ..