1993 DODGE TRUCK coolant temperature

FUEL
INJECTOR
#8
FUEL
INJECTOR #4 FUEL
INJECTOR
#2

EGR

SOLENOID/

TRANSDUCER

DISTRIBUTOR
IGNITION
COIL
THROTTLE

BODY

CHARGE
AIR

TEMPERATURE
SENSOR

BEYOND
THIS
POINT
SEE
VIEW,
Z

TO
A/C

COMPRESSOR
CLUTCH ^DISTRIBUTOR

GENERATOR
GROUND

POWER

STEERING
PUMP ENGINE
OIL

PRESSURE
SENDING
UNIT/SWITCH

VIEW
IN
DIRECTION OF ARROW
Y

TO TRANSMISSION WIRING

THROTTLE
POSITION
(SENSOR)
IDLE AIR
CONTROL MOTOR

GENERATOR
ENGINE COOLANT

TEMPERATURE
SENSOR
(PCM)
ENGINE
COOLANT

TEMPERATURE

SENSOR
(GAUGE)
MAP

SENSOR

FUEL
INJECTOR
#3

EVAP/PURGE

SOLENOID

FUEL
INJECTOR #7
FUEL
INJECTOR.
#5

FUEL
INJECTOR
#1

A/C
CLUTCH VIEW
IN
DIRECTION
OF ARROW
Z

J938W-86
Fig.
24 Engine Wiring 5.2L and 5.9L MPI Engine o
>
30

>

2
w

oo !\3

8W
- 40
WIRING DIAGRAMS

Wiring Diagram Name Sheet Number

Oil-Gas
Engine
28

Temperature-Diesel Engine
. . . ., 27
Temperature-Gas Engine
. .28

Sensors
Camshaft Position
. . .20

Crankshaft Position
. .
.18,25

Engine
Coolant
Temperature
20
Electronic
Vacuum-Diesel Engine
. .34

Heated Oxygen
17
Intake
Air
Temperature
25

Map
20

Rear
Wheel Anti-Lock Brake 32,34

Throttle
Position
with
Diesel Engine
26
Vehicle Speed .20,25 Water
In
Fuel-Diesel Engine
25

Solenoids
EMCC
Solenoid
11, 12

EVAP
Purge
with
Gas
Ignition
.16

Exhaust
Gas
Recirculating
Gas Engine
.16

Fuel
.24

Transmission Overdrive
12,14

Speakers
62,64

Splices
Splice AO 1,2,4,6
Splice
A3
30,47
Splice
A4 39

Splice A21
16,23

Splice A21-1
. .68

Splice
A21-2 24
Splice A21-3
21

Splice A142
.15

Splice
A142-1 15

Splice
C4
.67,69
Splice
C7
.67,69
Splice
E2
.48,52,61,63,65
Splice F21
. , 71
Splice
F35 73

Splice
G5
12,13,14,58,77,78 Splice
G7
........... .19,25
Splice G7-1
. . .20

Splice
K4
20,26 Splice K4-1
.... ..... ; . 18,20

Splice
K6 , 20
Splice
K7 .20

Splice
L1 .79

Splice
L6 . .50

Splice
L7
43,45
Splice L7-1 40,41,47,61,63,65
Splice
L7-2
.41,79
Splice
L7-3 .41
Splice
L7-4 41

Splice
L7-5 .41

Splice
L50
......
.
........... .32,34,36,38,56
Splice
M1
49,51,52,61,63,65,75 Splice M1-1
51

Splice
M2 . .49

Splice M2-1
.51

Splice
P33 . 74
Wiring Diagram Name Sheet Number
Splice
P34 .... .74

Splice T41 ..............
.9

Splice
V6 . .
.54,55
Splice
X2 . .30
Splice X2-1
. . . .
.79,81
Splice X2-4
41
Splice X2-5
.41

Splice X2-6
.... .41
Splice X2-7
80,81

Splice X53
.65
Splice
X54
..........
. . 65

Splice Z1-1
.48
Splice Z1-2 48,52
Splice Z1-3
. . 48

Splice Z1-4
...
.44,46
Splice
Z1-5 ..... . . . .
-43,45
Splice Z1-6
11,23
Splice
Z1-7 .
.41,79
Splice Z1-8 77,78 Splice Z1-9
. .
............ .71,73,75
Splice Z1-10
. 71,73

Splice Z1-11 .77,78
Splice Z11
23

Splice
Z12 ' 17

Splice Z12-1
17,23

Steering Column Connector
.
87,88
Stereo Radio 61,63,65
Stop
Lamp Switch 32,34
Stop/Turn System
.56

Switches
A/C
Low
Pressure
with
Gas Engine
67
A/C
Low
Pressure
with
Diesel Engine
70

A/C
Heater Blower
with
Diesel Engine
69

A/C
Heater Blower
with
Gas Engine
67

A/C
Vacuum
with
Diesel Engine
69

A/C
Vacuum
with
Gas Engine
67
Automatic
Transmission
Neutral
Start
with
Diesel Engine
. .7

Automatic
Transmission
Neutral
Start
with
Gas Engine
. . .9
Back-Up
Lamp
.7,9

Brake Warning Lamp Diesel Engine
34

Brake Warning Lamp Gas Engine
. .32

Cargo
Lamp
49

Clutch
8

Clutch
Cycling
...
.68,70 Dimmer-Headlamp
47

Dome
Lamp-Front
. .50

Dome
Lamp-Rear
50

Door
Jamb
. 49
Engine
Coolant Temp
.26

Four
Wheel Drive
13

Front
Axle
13

Glove
Box
Lamp
. .52

Hazard Warning
.56

Headlamp
1,47

Heated Rear Window
39
Heater
. .
.66,67
Horn
.30
Ignition
2,10

WIRING DIAGRAMS 8W - 87
ENGINE COOLANT TEMPERATURE SWITCH TRANSMISSION
THERMO SWITCH

(LEFT

SIDE
REAR
OF ENGINE BLOCK)
-K4
18BK/LB

-K4
18BK/LB

-K4
18BK/LB

-K4
20BK/LB
K2
20TN/BK
-T25 20LG/RD

L-h--
K44
20TN/YL
K4
20BK/LB
^-flf
G7
20WT

/OR
A
\BLACK
/
(LEFT
REAR OF ENGINE) O o oo O
O 9 9 9 O
VEHICLE SPEED
SENSOR

(ON REAR OF
TRANSMISSION)
AUTOMATIC TRANS 2 W.D. ONLY
K22
180R

DB
TO A/C SYSTEM

(SEE
SH 70)
K4
18BK LB K6

20VT
WT
C13

20DB
OR
C20
18BR
22 4 6

T.P.(S.)
SENSOR 5
VOLT
RETURN SUPPLY
POWERTRAIN CONTROL MODULE II (PCM II) 34 27

W.O.T.
A/C RELAY COMPRESSOR CLUTCH
CONNECTOR (SEE SH 83)
(LEFT
FENDER SIDE SHIELD)

J938W-11
DIESEL CONTROL SYSTEM AD 26

8W - 100 WIRING DIAGRAMS

ILLUMINATION
LAMP VOLTMETER LEFT TURN SIGNAL LAMP

SEAT
BELT WARNING LAMP

ILLUMINATION
LAMP
NOT
USED

ILLUMINATION
LAMP LOW ENGINE
OIL
PRESSURE
LAMP
RIGHT TURN SIGNAL LAMP
LOW ENGINE
OIL
PRESSURE
GAUGE

ILLUMINATION
LAMP ENGINE COOLANT
TEMPERATURE GAUGE

ILLUMINATION
LAMP

MALFUNCTION
INDICATOR LAMP
VEHICLE SPEED SENSOR
(ELECTRIC SPEEDOMETER)
HIGH-BEAM
INDICATOR LAMP

ILLUMINATION
LAMP
FUEL GAUGE AD 59

CLUSTER-PRINTED
CIRCUIT BOARD
J938W-11

WIRING
DIAGRAMS
8W - 101

G20
20VT/YL

ENGINE COOLANT
TEMPERATURE GAUGE SENDING
UNIT
(SEE
SH 27,28)

L61
18LG
LEFT TURN SIGNAL LAMP
(SEE
SH 56)

G7
20WT/0R
VEHICLE SPEED SENSOR
(SEE
SH 19,25)
GRAY

G13 20DB/RD SEAT BELT WARNING LAMP SWITCH
(SEE
SH 77,78)

G3 20BK/PK MALFUNCTION INDICATOR LAMP)
(SEE
SH 58)

G5
20DB/WT
IGNITION FEED-12 VOLTS
(SEE
SH 58)

LEFT CONNECTOR

BLACK
E2
200R
ILLUMINATION LAMP FEED

(SEE
SH 48)

Zl 20BK GROUND
(SEE
SH 48)

G4
20DB
FUEL GAUGE SENDING
UNIT
(SEE
SH 77,78)
G6
20GY
ENGINE
OIL
PRESSURE LAMP SWITCH

(SEE
SH 27,28)

G5
20DB/WT
IGNITION FEED-12 VOLTS
(SEE
SH 58,77,78)

G34 16RD/GY HIGH-BEAM INDICATOR LAMP
(SEE
SH 43,45)

L60
18TN
RIGHT TURN SIGNAL LAMP
(SEE
SH 56)
G60 20GY/YL ENGINE
OIL
PRESSURE GUAGE

SENDING
UNIT
(SEE
SH 27,28)

RIGHT CONNECTOR
J938w-ii
PRINTED CIRCUIT BOARD CONNECTORS

AD
60

WIRING
DIAGRAMS 8W - 125
5.2L £ 5.9L ENGINE VIEWED FROM WIRE
END OF CONNECTOR

POWERTRAIN
CON

J938W-H
(PCM II) CONNECTOR
CAV

IGNITION
SYSTEM CIRCUITS SHEET

1
Kl
200G/RD
MAP
SENSOR
20
2"-1 K2
20TN/BK
ENGINE COOLANT TEMPERATURE SENSOR
20
3 A14
IBRD
DIRECT BATTERY
16
4 K4 18BK/LB

SENSOR
RETURN
20
5 Zll
16BK/WT

SIGNAL
GROUND
17
6 K6
20VT/WT
5 VOLT SUPPLY
20
7
K7
180R 8 VOLT INPUT
20
8 —
—
9 A21 14DB IGNITION FEED
16
10 T6
200R/WT
TRANSMISSION
OD CONTROL
12
11 Z12 18BK/TN POWER GROUND
17
12 Z12 18BK/TN POWER GROUND
17
13 |Kl4 18LB/BR
INJECTOR DRIVER 4
15
14 K13
18YL/WT

INJECTOR DRIVER 3
15
15 K12 18TN INJECTOR DRIVER 2
15
16
17" Kl1
18WT/DB

INJECTOR DRIVER 1
15
16
17"
K17
18DB/TN
INJECTOR DRIVER 7
15
18 K18
18RD/YL
INJECTOR DRIVER 8
15
19 K19 18GY IGNITION COIL DRIVER
15
20 K20 18DG GENERATOR FIELD DRIVER
19
21 K21
18BK/RD
TB SURFACE TEMP SENSOR
20
22 K22
180R/DB
THROTTLE POSITION (SENSOR)
18
23 K141
18TN/WT
HEATED OXYGEN SENSOR (5.9L HD)
17
24 K24 18GY/BK
REFERENCE
PICKUP
18
25 021
20PK
DATA LINK TRANSMIT
17
26 —
—
27 C20 18BR
A/C
CYCLING SWITCH INPUT
18
28 — _
29 V40
18WT/PK
BRAKE
SENSE

35
30 T41
20BR/YL
PARK/NEUTRAL POSITION SWITCH
19
31 —
—
32 G3
20BK/PK
MALUNCTION INDICATOR LAMP
19
33 V36
20TM/RD

VEHICLE SPEED CONTROL-VACUUM
35
34 C13 20DB/OR W.O.T. CUTOUT RELAY
18
35 K35 20GY/YL
EGR
SOLENOID
16
36 —
— —
37 TBI 20BK/0R
TRANSMISSION
OD LAMP SIGNAL
12
38 K15
18PK/BK
INJECTOR DRIVER 5
15
39
"40 K39 18GY/RD
IDLE AIR CONTROL MOTOR
19
39
"40 K40 18BR/WT IDLE AIR CONTROL MOTOR
19
41 K41
18BK/DG
HEATED OXYGEN SENSOR
17
42
43 —
—
42
43 —
—
—
44 K44 18GY CAMSHAFT POSITION
SENSE

20
45 020 20LG
DATA LINK RECEIVE
17
46 —
— —
47 G7
20WT/OR
VEHICLE SPEED SENSOR PICKUP
20
48 V31
20BR/RD
VEHICLE SPEED CONTROL-SET
35
49 V32
20YL/RD
VEHICLE SPEED CONTROL-ON/OFF
35
50 Y33
20WT/LG
VEHICLE SPEED CONTROL-RESUME
35
51 K51 20DB/YL AUTOMATIC SHUT-DOWN RELAY
16
52 K52
20PK/BK
EVAP/PURGE
SOLENOID
16
53 V35
20LG/RD
VEHICLE SPEED CONTROL-VENT
35
54 K54
200R/BK
EMCC
SOLENOID
11.12
55 T60
200R/LG
TRANSMISSION
OD SOLENOID
12
5G G24
20GY/PK
SERVICE
REMINDER INDICATOR LAMP
13
57 A142 16DG/0R
A.S.D.-
BATTERY
SENSE

15
58 K16 18LG/BK INJECTOR DRIVER 6
15
59 K59 18VT/BK IDLE AIR CONTROL MOTOR
19
60 K60 18YL/BK IDLE AIR CONTROL MOTOR
19

TROL
MODULE II
(GAS
MFI ENGINES) AD 84

8W - 126
WIRING
DIAGRAMS
SMALL
INDEX
50 49 48
47
46 45
44 43 42 41
40 39
38 37
36 35
34 33 32
© 31
30 29
28 27
26
© 25
24 23
22 21
20 ©
19 18
17
16 15 14 13 12 11 10 9 8 7
6 5 4
3 2
1
LARGE

INDEX TERMINAL END
OF DISCONNECT
ENGINE COMPARTMENT CAVITY

1

10
11
12
13
14 15
16
17
18 19
20
21
22
23
24
25
26
27
28
29
30 31
32 33
34
35
36
37
38
39 40
41
42
43
44
45
46
47
48
50 ENGINE COMPARTMENT CIRCUITS
A3 12RD/WT C7 12BK/TN
A141 16DG/BK
L4
16VT/WT

L3 14RD/0R
V30 20DB/RD
V31 20BR/RD V33
20WT/LG

V32 20YL/RD

E5
20DG/WT

G34 16RD/GY
L20
14LG/WT

G21 20GY/LB G20
20VT/YL

G6 20GY
G60 20GY/YL
G85 20TN/OR
L61 18LG L60 18TN
A15 16PK
T61 20BK/0R
LI 18VT/BK
L7 18BK/YL
F20 18WT
V10 20BR
A41 16YL
X2 18DG/RD
Ml 18BK/TN
Gil
20WT/BK

V5 18DG/YL
V6 18DB
C21 18DB/0R
G3 20BK/PK
X4 20LG/BR V40 18WT/PK
G24 20GY/PK
G7 2GWT/0R T6
200R/WT

V3 18BR/WT
V4 18RD/YL
A21 14DB
A4 12BK/RD Al 12RD
A2 12PK/BK HEADLAMP SWITCH

A/C
AND HEATER BLOWER MOTOR
FUEL PUMP FEED (GAS ONLY)
HEADLAMP LOW BEAM (2 WIRES)
HEADLAMP HIGH BEAM (2 WIRES)
VEHICLE
SPEED
CONTROL
VEHICLE
SPEED
CONTROL VEHICLE
SPEED
CONTROL
VEHICLE
SPEED
CONTROL

WAIT
TO START LAMP (DIESEL
QNLYr

HIGH BEAM INDICATOR LAMP
HIGH BEAM FEED
TACHOMETER SIGNAL (DIESEL)
ENGINE COOLANT TEMPERATURE SENDING
UNIT

ENGINE OIL
PRESSURE
SWITCH
ENGINE OIL
PRESSURE
SENDING
UNIT

WATER-IN FUEL LAMP (DIESEL)
LEFT TURN SIGNAL LAMP RIGHT TURN SIGNAL LAMP
BATTERY-HAZARD FLASHER
TRANSMISSION
OVERDRIVE INDICATOR LAMP
BACK-UP LAMPS
PARKING LAMPS (2 WIRES)
BACK-UP LAMP SWITCH
WINDSHIELD WASHER MOTOR
ENGINE STARTER RELAY
-1GNITI
ON HORN
UNDERHOOD LAMP

ELECTRIC
VACUUM
SENSOR
(DIESEL) (2 WIRES)
WINDSHIELD WIPER MOTOR
WINDSHIELD WIPER MOTOR
AIR CONDITIONING DAMPED
PRESSURE
SWITCH
MALFUNCTION INDICATOR LAMP
4 WHEEL DRIVE SWITCH

BRAKE
SENSOR
SRI
LAMP (GAS ENGINE ONLY)
VEHICLE
SPEED SENSOR

TRANSMISSION
OVERDRIVE
WINDSHIELD WIPER MOTOR
WINDSHIELD WIPER MOTOR
SPLICE-IGNITION RUN CIRCUIT
IGNITION
OFF DRAW

IGNITION
SWITCH
IGNITION
SWITCH
AD 85 50-WAY BULKHEAD DISCONNECT
J938W-11

•

ENGINES
9 - 11 SERVICE DIAGNOSIS (DIESEL ENGINE) - PERFORMANCE (CONT.)

CONDITION
POSSIBLE
CAUSES
CORRECTION

LOW
POWER
(Cont'd)
SJow
throttle
response, leaking
air
fuel
control
tube
or
improperly
operating
control

in the pump. Tighten the fittings. Replace the pump if the controls are not
functioning.
Incorrect
external
injection

pump
timing. Verify
that
injection pump timing marks are aligned (see Group
14, Fuel System).
Inadequate intake air flow. Inspect/replace air cleaner element. Look for other restrictions.

High
pressure
fuel
leak. Inspect/correct leaks in the high pressure lines, fittings
injector

sealing
washers or delivery valve
seals.

Inadequate
fuel
supply.
Check
the flow through the
filter
to locate the source of the
restriction.

High
fuel
temperature. Verify
that
fuel
heater is off during warm weather. Check for a
restricted
fuel
drain manifold. Repair/replace as needed.

Poor
quality
fuel
or
fuel

contaminated
with
gasoline. Verify by operating from a temporary tank
with
good
fuel.

Check
for presence of
gasoline.
Replace
fuel/water
separator

filter.

Air
leak between the turbo- charger and the intake manifold. Check/correct leaks in the air crossover tube,
hoses,
gaskets,

and
around mounting capscrews or through holes in the manifold
cover.

Exhaust
leak at the manifold
or turbocharger. Check/correct leaks in the manifold or turbocharger
gaskets.

If manifold is cracked, replace manifold.
Improperly operating turbo-
charger. Inspect/replace turbocharger.
Valve clearance incorrect.
Check/adjust
valves.
Injection pump improperly
operating. Check/time pump
(refer
to Group 14, Fuel System).

Worn
or improperly operating injectors. Check/replace injectors.
Improperly operating injection

pump.
Replace
injection pump.

Excessive
exhaust restriction. Check/correct the restriction in the exhaust system.

EXCESSIVE
EXHAUST

SMOKE
Engine
running too cold
(white

smoke).
Refer to troubleshooting logic for coolant
temperature
below
normal
(refer
to Group 7,
Cooling
System).
Inspect intake
manifold heater/KSB valve for proper operation.
Inadequate intake air.
Inspect/change
air cleaner. Look for other restriction.

Air
leak between turbocharger

and
intake manifold. Check/correct leaks in the air crossover tube,
hoses,
gaskets,

mounting capscrews or through holes in the manifold cover.

Exhaust
leak at the manifold
or turbocharger. Check/correct leaks in the manifold or turbocharger
gaskets.

If cracked replace manifold.
Improperly operating
turbocharger. Inspect/replace turbocharger.
J9209-57