2002 DODGE RAM Service Repair Manual

open gas tank check engine light climate control oil viscosity adblue fuel pressure

Load previous 8 pages

Page 457 of 2255

Page 458 of 2255

DODGE RAM 2002 Service Repair Manual IGNITION CONTROL
TABLE OF CONTENTS
page page
IGNITION CONTROL
DESCRIPTION - 8.0L V-10.................2
OPERATION
OPERATION - 8.0L V-10.................2
OPERATION - V-8......................2
SPECIFI

IGNITION CONTROL
TABLE OF CONTENTS
page page
IGNITION CONTROL
DESCRIPTION - 8.0L V-10.................2
OPERATION
OPERATION - 8.0L V-10.................2
OPERATION - V-8......................2
SPECIFICATIONS
SPECIFICATIONS - TORQUE - IGNITION....2
SPARK PLUG CABLE ORDERÐ8.0L V-10
ENGINE..............................3
ENGINE FIRING ORDERÐ5.9L V-8
ENGINES............................3
SPARK PLUG CABLE RESISTANCE........3
SPARK PLUGS........................3
IGNITION COIL RESISTANCEÐ5.9L
ENGINES............................3
IGNITION COIL RESISTANCEÐ8.0L V-10
ENGINE..............................4
IGNITION TIMING......................4
AUTOMATIC SHUT DOWN RELAY
DESCRIPTION - PCM OUTPUT.............4
OPERATION
OPERATION - PCM OUTPUT.............4
OPERATION - ASD SENSE - PCM INPUT....4
DIAGNOSIS AND TESTING - ASD AND FUEL
PUMP RELAYS........................4
REMOVAL.............................5
INSTALLATION..........................5
CAMSHAFT POSITION SENSOR
DESCRIPTION
DESCRIPTION - DIESEL.................6
DESCRIPTION - 5.9L....................6
DESCRIPTION - 8.0L....................6
OPERATION
OPERATION - DIESEL...................6
OPERATION - 5.9L.....................7
OPERATION - 8.0L.....................7
REMOVAL
REMOVAL - DIESEL....................7
REMOVAL - 5.9L.......................7
REMOVAL - 8.0L.......................8
INSTALLATION
INSTALLATION - DIESEL.................9INSTALLATION - 5.9L..................10
INSTALLATION - 8.0L..................10
DISTRIBUTOR
DESCRIPTION.........................11
OPERATION...........................12
REMOVAL.............................12
INSTALLATION.........................13
DISTRIBUTOR CAP
DIAGNOSIS AND TESTING - DISTRIBUTOR
CAP ................................14
DISTRIBUTOR ROTOR
DIAGNOSIS AND TESTING - DISTRIBUTOR
ROTOR .............................14
IGNITION COIL
DESCRIPTION
DESCRIPTION - 5.9L...................15
DESCRIPTION - 8.0L...................15
OPERATION
OPERATION - 5.9L....................15
OPERATION - 8.0L....................15
REMOVAL
REMOVAL - 5.9L......................15
REMOVAL - 8.0L......................16
INSTALLATION
INSTALLATION - 5.9L..................16
INSTALLATION - 8.0L..................16
SPARK PLUG
DESCRIPTION.........................16
OPERATION...........................16
DIAGNOSIS AND TESTING - SPARK PLUG
CONDITIONS.........................17
REMOVAL.............................19
CLEANING............................20
INSTALLATION.........................20
SPARK PLUG CABLE
DESCRIPTION.........................20
OPERATION...........................20
DIAGNOSIS AND TESTING - SPARK PLUG
CABLES............................20
REMOVAL.............................21
INSTALLATION.........................21
BR/BEIGNITION CONTROL 8I - 1

Page 459 of 2255

DODGE RAM 2002 Service Repair Manual IGNITION CONTROL
DESCRIPTION - 8.0L V-10
The ignition system used on the 8.0L V±10 engine
does not use a conventional mechanical distributor.
The system will be referred to as a distributor-less
igni

Page 460 of 2255

DODGE RAM 2002 Service Repair Manual SPARK PLUG CABLE ORDERÐ8.0L V-10
ENGINEENGINE FIRING ORDERÐ5.9L V-8 ENGINES
SPARK PLUG CABLE RESISTANCE
MINIMUM MAXIMUM
250 Ohms Per Inch 1000 Ohms Per Inch
3000 Ohms Per Foot 12,000 Ohms Per Foot
S

Page 461 of 2255

DODGE RAM 2002 Service Repair Manual IGNITION COIL RESISTANCEÐ8.0L V-10
ENGINE
Primary Resistance: 0.53-0.65 Ohms. Test across the
primary connector. Refer to text for test procedures.
Secondary Resistance: 10.9-14.7K Ohms. Test
across

IGNITION COIL RESISTANCEÐ8.0L V-10
ENGINE
Primary Resistance: 0.53-0.65 Ohms. Test across the
primary connector. Refer to text for test procedures.
Secondary Resistance: 10.9-14.7K Ohms. Test
across the individual coil towers. Refer to text for test
procedures.
IGNITION TIMING
Ignition timing is not adjustable on any engine.
AUTOMATIC SHUT DOWN
RELAY
DESCRIPTION - PCM OUTPUT
The 5±pin, 12±volt, Automatic Shutdown (ASD)
relay is located in the Power Distribution Center
(PDC). Refer to label on PDC cover for relay location.
OPERATION
OPERATION - PCM OUTPUT
The ASD relay supplies battery voltage (12+ volts)
to the fuel injectors and ignition coil(s). With certain
emissions packages it also supplies 12±volts to the
oxygen sensor heating elements.
The ground circuit for the coil within the ASD
relay is controlled by the Powertrain Control Module
(PCM). The PCM operates the ASD relay by switch-
ing its ground circuit on and off.
The ASD relay will be shut±down, meaning the
12±volt power supply to the ASD relay will be de-ac-
tivated by the PCM if:
²the ignition key is left in the ON position. This
is if the engine has not been running for approxi-
mately 1.8 seconds.
²there is a crankshaft position sensor signal to
the PCM that is lower than pre-determined values.
OPERATION - ASD SENSE - PCM INPUT
A 12 volt signal at this input indicates to the PCM
that the ASD has been activated. The relay is used to
connect the oxygen sensor heater element, ignition
coil and fuel injectors to 12 volt + power supply.
This input is used only to sense that the ASD relay
is energized. If the Powertrain Control Module
(PCM) does not see 12 volts at this input when the
ASD should be activated, it will set a Diagnostic
Trouble Code (DTC).
DIAGNOSIS AND TESTING - ASD AND FUEL
PUMP RELAYS
The following description of operation and
tests apply only to the Automatic Shutdown
(ASD) and fuel pump relays. The terminals on the
bottom of each relay are numbered. Two different
types of relays may be used, (Fig. 1) or (Fig. 2).
Fig. 1 ASD and Fuel Pump Relay TerminalsÐType 1
TERMINAL LEGEND
NUMBER IDENTIFICATION
30 COMMON FEED
85 COIL GROUND
86 COIL BATTERY
87 NORMALLY OPEN
87A NORMALLY CLOSED
Fig. 2 ASD and Fuel Pump Relay TerminalsÐType 2
TERMINAL LEGEND
NUMBER IDENTIFICATION
30 COMMON FEED
85 COIL GROUND
86 COIL BATTERY
87 NORMALLY OPEN
87A NORMALLY CLOSED
8I - 4 IGNITION CONTROLBR/BE
IGNITION CONTROL (Continued)

Page 462 of 2255

DODGE RAM 2002 Service Repair Manual ²Terminal number 30 is connected to battery volt-
age. For both the ASD and fuel pump relays, termi-
nal 30 is connected to battery voltage at all times.
²The PCM grounds the coil side of the relay

²Terminal number 30 is connected to battery volt-
age. For both the ASD and fuel pump relays, termi-
nal 30 is connected to battery voltage at all times.
²The PCM grounds the coil side of the relay
through terminal number 85.
²Terminal number 86 supplies voltage to the coil
side of the relay.
²When the PCM de-energizes the ASD and fuel
pump relays, terminal number 87A connects to termi-
nal 30. This is the Off position. In the off position,
voltage is not supplied to the rest of the circuit. Ter-
minal 87A is the center terminal on the relay.
²When the PCM energizes the ASD and fuel
pump relays, terminal 87 connects to terminal 30.
This is the On position. Terminal 87 supplies voltage
to the rest of the circuit.
The following procedure applies to the ASD and
fuel pump relays.
(1) Remove relay from connector before testing.
(2) With the relay removed from the vehicle, use
an ohmmeter to check the resistance between termi-
nals 85 and 86. The resistance should be 75 ohms +/-
5 ohms.
(3) Connect the ohmmeter between terminals 30
and 87A. The ohmmeter should show continuity
between terminals 30 and 87A.
(4) Connect the ohmmeter between terminals 87
and 30. The ohmmeter should not show continuity at
this time.
(5) Connect one end of a jumper wire (16 gauge or
smaller) to relay terminal 85. Connect the other end
of the jumper wire to the ground side of a 12 volt
power source.
(6) Connect one end of another jumper wire (16
gauge or smaller) to the power side of the 12 volt
power source.Do not attach the other end of the
jumper wire to the relay at this time.
WARNING: DO NOT ALLOW OHMMETER TO CON-
TACT TERMINALS 85 OR 86 DURING THIS TEST.
DAMAGE TO OHMMETER MAY RESULT.
(7) Attach the other end of the jumper wire to
relay terminal 86. This activates the relay. The ohm-
meter should now show continuity between relay ter-
minals 87 and 30. The ohmmeter should not show
continuity between relay terminals 87A and 30.
(8) Disconnect jumper wires.(9) Replace the relay if it did not pass the continu-
ity and resistance tests. If the relay passed the tests,
it operates properly. Check the remainder of the ASD
and fuel pump relay circuits. Refer to 8, Wiring Dia-
grams.
REMOVAL
The ASD relay is located in the Power Distribution
Center (PDC) (Fig. 3). Refer to label on PDC cover
for relay location.
(1) Remove PDC cover.
(2) Remove relay from PDC.
(3) Check condition of relay terminals and PDC
connector terminals for damage or corrosion. Repair
if necessary before installing relay.
(4) Check for pin height (pin height should be the
same for all terminals within the PDC connector).
Repair if necessary before installing relay.
INSTALLATION
The ASD relay is located in the Power Distribution
Center (PDC) (Fig. 3). Refer to label on PDC cover
for relay location.
(1) Install relay to PDC.
(2) Install cover to PDC.
Fig. 3 Power Distribution Center (PDC)
1 - POWER DISTRIBUTION CENTER (PDC)
BR/BEIGNITION CONTROL 8I - 5
AUTOMATIC SHUT DOWN RELAY (Continued)

Page 463 of 2255

DODGE RAM 2002 Service Repair Manual CAMSHAFT POSITION
SENSOR
DESCRIPTION
DESCRIPTION - DIESEL
The three-wire Camshaft Position Sensor (CMP) is
located below the fuel injection pump (Fig. 4). It is
attached to the back of the timing gear

Page 464 of 2255

DODGE RAM 2002 Service Repair Manual the ECM relating engine speed and crankshaft posi-
tion.
The sensor detects machined notches on the rear
face of the camshaft drive gear (Fig. 7) to sense
engine speed.
The CMP also detects an area on

the ECM relating engine speed and crankshaft posi-
tion.
The sensor detects machined notches on the rear
face of the camshaft drive gear (Fig. 7) to sense
engine speed.
The CMP also detects an area on the camshaft
drive gear that has no notch (Fig. 7). When the sen-
sor passes this area, it tells the Engine Control Mod-
ule (ECM) that Top Dead Center (TDC) of the
number 1 cylinder is occurring. The ECM will then
adjust fuel timing accordingly.
As the tip of the sensor passes the notches, the
interruption of magnetic field causes voltage changes
from 5 volts to 0 volts.
OPERATION - 5.9L
The sensor contains a hall effect device called a
sync signal generator to generate a fuel sync signal.
This sync signal generator detects a rotating pulse
ring (shutter) on the distributor shaft. The pulse ring
rotates 180 degrees through the sync signal genera-
tor. Its signal is used in conjunction with the Crank-
shaft Position (CKP) sensor to differentiate between
fuel injection and spark events. It is also used to syn-
chronize the fuel injectors with their respective cylin-
ders.
When the leading edge of the pulse ring (shutter)
enters the sync signal generator, the following occurs:
The interruption of magnetic field causes the voltageto switch high resulting in a sync signal of approxi-
mately 5 volts.
When the trailing edge of the pulse ring (shutter)
leaves the sync signal generator, the following occurs:
The change of the magnetic field causes the sync sig-
nal voltage to switch low to 0 volts.
OPERATION - 8.0L
The CMP sensor is used in conjunction with the
crankshaft position sensor to differentiate between
fuel injection and spark events. It is also used to syn-
chronize the fuel injectors with their respective cylin-
ders. The sensor generates electrical pulses. These
pulses (signals) are sent to the Powertrain Control
Module (PCM). The PCM will then determine crank-
shaft position from both the camshaft position sensor
and crankshaft position sensor.
A low and high area are machined into the cam-
shaft drive gear (Fig. 8). The sensor is positioned in
the timing gear cover so that a small air gap (Fig. 8)
exists between the face of sensor and the high
machined area of cam gear.
When the cam gear is rotating, the sensor will
detect the machined low area. Input voltage from the
sensor to the PCM will then switch from a low
(approximately 0.3 volts) to a high (approximately 5
volts). When the sensor detects the high machined
area, the input voltage switches back low to approx-
imately 0.3 volts.
REMOVAL
REMOVAL - DIESEL
The camshaft position sensor (CMP) is located
below the fuel injection pump (Fig. 9). It is attached
to the back of the timing gear cover housing.
(1) Disconnect both negative cables from both bat-
teries.
(2) Clean area around CMP.
(3) Disconnect electrical at CMP (Fig. 9).
(4) Remove CMP mounting bolt. Bolt head is
female-hex (Fig. 10).
(5) Remove CMP from engine by twisting and pull-
ing straight back.
(6) Discard CMP o-ring (Fig. 10).
REMOVAL - 5.9L
The camshaft position sensor is located in the dis-
tributor (Fig. 11).
Distributor removal is not necessary to remove
camshaft position sensor.
(1) Remove air cleaner assembly.
(2) Disconnect negative cable from battery.
(3) Remove distributor cap from distributor (two
screws).
Fig. 7 Notches at Rear Of Camshaft Drive Gear
1 - CAMSHAFT DRIVE GEAR
2 - NOTCHES
3 - CAMSHAFT POSITION SENSOR (CKP)
4 - NO NOTCH
BR/BEIGNITION CONTROL 8I - 7
CAMSHAFT POSITION SENSOR (Continued)

Load next 8 pages

Page: < prev 1-10 ... 425-432 433-440 441-448 449-456 457-464 465-472 473-480 481-488 489-496 ... 2256 next >

sat nav wheel alignment night vision ECU lumbar support service interval