GMC C Series 1993 Operating instructions

CAUTION
To reduce the chance of personal injury and/or property damage, the
follo ing instructions must be carefully observed:
Proper service and repair are important to the safety of the service
technician and the safe, reliable operation of all motor vehicles. If part
replacement is necessary, the part must be replaced ith one of the
same part number or ith an equivalent part. Do not use a replacement
part of lesser quality.
The service procedures recommended and described in this service
manual are effective methods of performing service and repair. Some of
these procedures require the use of tools specifically designed for the
purpose.
Accordingly, anyone ho intends to use a replacement part, service
procedure, or tool that is not recommended by the vehicle
manufacturer must first determine that neither his safety nor the safe
operation of the vehicle ill be jeopardized by the replacement part,
service procedure, or tool selected.
It is important to note that this manual contains various Cautions and
Notices that must be carefully observed in order to reduce the risk of
personal injury during service or repair, or the possibility that improper
service or repair may damage the vehicle or render it unsafe. It is also
important to understand that these ‘Cautions’ and ‘Notices’ are not
exhaustive, because it is impossible to arn of all the possible
hazardous consequences that might result from failure to follo these
instructions.
I.
i

FOREWORD
This manual contains procedures for disassembly and assembly of the components listed in the table of contents
once they have tieen removed from the vehicle. Procedures explaining ho to remove components from the vehicle
are outlined in th|e appropriate service manual. Fuel and emissions related components are covered in the Medium
Duty Truck Fuel and Emissions Manual. Wiring diagrams and electrical diagnosis for these models are published in
the Electrical Diagrams and Diagnosis Manual.
This manual should be kept in a handy place for ready reference. If properly used, it ill meet the needs of
technicians and vehicle o ners.
i • ......
GMC Truck! Division service manuals are intended for use by professional, qualified
technicians. Attempting repairs or service ithout the appropriate training, tools, and
equipment could cause injury to you or others and damage to your vehicle that may
cause it not jto operate properly.
i ’ ‘ >'
ii i

MEDIUM DUTY TRUCK
UNIT REPAIR MANUAL
The Table of Contents on the follo ing page indicates the sections, covered in this manual. At
the beginning of each individual section-is a Table of Contents hich gives the page number on
hich each major subject begins. '
When reference is made in this manual to a brand name, number, or specific tool, an
equivalent product may be used in place of the recommended item.
All information, illustrations, and specifications contained in this manual are based on the
latest product information available at the time of publication approval. The right is reserved to
make changes at any time ithout notice.
GMC TRUCK DIVISION
TRUCK & BUS GROUP
General Motors Corporation
X-9338
Pontiac, Michigan
©1992 General Motors Corporation
Printed in U.S.A. ■April, 1992
All rights reserved
No part of this publication may be reproduced, stored in any retrieval system, or transmitted, in
any form or by any means, including but not limited to electronic, mechanical, photocopying,
recording or other ise, ithout the prior ritten permission of the GMC Truck Division of General
Motors Corp. This includes all text, illustrations, tables, and charts.
f

TABLE OF CONTENTS
The table of contents on this page indicates the sections covered in this manual. At the beginning of each
individual section is a table of contents hich gives the page number on . hich each major subject begins.
SECTION SUBJECT ii-M ' 'c o n t en ts '
0GENERAL
INFORMATION OA GENERAL INFORMATION
' ‘ i, l 4 = ■ :
1AIR
CONDITIONING 1D2 HR-HE AIR CONDITIONING 1D6 5D-510 HD AIR CONDITIONING
COMPRESSOR; ! ill COMPRESSOR
3STEERING
i ' .
3B1A POWER STEERING GEAR 3B3 POWER STEERING
3B1B POWER STEERING PUMP COMPONENTS (TRW ROSS)
3B2 POWER STEERING 3B4 POWER STEERING
com ponents (Midland) com ponents (luk lf93)
4REAR AXLE 4B2 REAR AXLE CONTROLS
5 BRAKES 5A MASTER CYLINDER 5I AIR FOUNDATION BRAKE
5D2 HYDRAULIC BQdSTER 5J AIR COMPRESSOR AND
5H AIR BRAKE VALVES GOVERNOR
6 ENGINE
6A2 V8 ENGINES, GASOLINE 6D2 CS-144 GENERATOR
6C1 MODEL 295 TBIj UNIT 6D3 SD STARTER MOTORS
6D ENGINE ELECTRICAL 6D4 37-MT STARTER MOTORS
6D1 21-SI 200 GENERAtORS 6D5 DISTRIBUTORS
INDEX ALPHABETICAL INDEX
IV

X-9338
GMC Truck Division service manuals are intended for use
by professional, qualified technicians, Attempting repairs or
service ithout the appropriate training, tools, and
equipment could cause injury to you or others and damage
to your vehicle that may cause it not to operate properly.
For Adistra Use Only
Order Number -
Date Filled
-4
Other GMC Truck Service Publications For Your ’93 TopKick/Kodiak and
Medium Duty For ard Control Models:
Price Each
Form Description FOrm No. . (U.S. Only) Qty. Total
MEDIUM DUTY TRUCK SERVICE MANUALS;
TopKick/Kodiak and For ard Control Models* X-9333 $83.00 $
Fuel and Emissions Mianual X-9335 $30.00 $
ELECTRICAL DIAGRAMS AND DIAGNOSIS
TopKick/Kodiak and For ard Control Models X-9341 $48.00 $
Refunds or exchanges ill not be accepted after 30 days.
Routine orders ill be shipped ithin 10 days of receipt.
For an additional charge of $9.00 Rush Orders ill be shipped
ithin 24 hours of receipt.
Only
Sub Total
Michigan Purchasers Add Sales Tax
Rush Order Charge
Please allo adequate time for postal service.
*We also offer UPS-Overnight Express-Call for Rates.
PRICES SUBJECT TO CHANGE TO CHANGE WITHOUT NOTICE.
Overnight Delivery
Grand Total
Sold To: (Also Fill out Shipping Label)
Company Name (Please Print Clearly) * 01
Name
Street Address Apt. No.
City, State, and Zip Code
This is
From:
Adistr*
Attn:
171 H
Plymo
» your shipping label Please Print Clearly
i Corporation
3MC Service Publications
amilton St.
uth, Michigan 48170
Company
Attentic>n
Street Address
City, State, and Zip Code
□ Check or Money Order Enclosed
Make checks payable to Adistra Corporation (No Stamps)
I |. Please Charge to my \ ~ \ VISA . Q Master Card
Please be sure to sign your check!!
I I American Express
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Mo. Yr.
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Mail to:
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Attn: GMC Service Publications
P.O. Box 436006
Pontiac, Michigan 48343
Or:
Call Toll Free ithin continental U.S.A.
1-800-627-5699
v

GENERAL INFORMATION OA-1
T"™“" " —^^ ^ ^ M mma——m i
SECTION OA
GENERAL INFORMATION
CONTENTS
SUBJECT PAGE
Special Tool Ordering Information
Service Parts Identification Label
Vehicle Identification Number ....
Vehicle Certification Label..........
Engine Identification Number ....
Diesel Engines .......... ...........
Gasoline Engines ...................
Rear Axle Identification Number
Rock ell......................................
Eaton ...........................................
Transmission Identification Number
Allison .........................................
Eaton-Full e r .................. .............
Model Identification ......................
Metric Fasteners ...........................
Fastener Strength Identification.
Prevailing Torque Fasteners ......
Metric-English Conversion .....
Decimal and Metric Equivalents
J1930 Word Conversion ..............
■>
OA- 1
OA- 1
OA- 2
OA- 2
OA- 3
OA- 3
OA- 4
OA- 4
OA- 4
OA- 5
OA- 5
OA- 5
OA- 5
OA- 5
OA- 5
OA- 8
OA- 8
OA- 9
OA- 9
OA- 9
SPECIAL TOOL ORDERING
INFORMATION
Special service tools that are sho n in this service
manual have tool product numbers beginning ith “J”
or “BT" are available for orld ide distribution from:
Kent-Moore
SPX Corporation
29784 Little Mack
Roseville, Ml 48066-2298
1-800-345-2233
Mon.-Fri. 8:00 p.m. EST
Telex: 244040 KMTR VR
Fax: [phone]
General Motors dealers can purchase TECH 1
scan tools and accessories through Kent-Moore at
the above address and phone number. Non-General
Motors dealer repair facilities can purchase TECH 1
scan tools and accessories from Kent-Moore at the
above address or :
Sun Electric Corporation
One Sun Park ay
Crystal Lake, IL 60014
1-800-CALLSUN (225-5786)
6:45 a.m. - 7:00 p.m. CST
SERVICE PARTS
IDENTIFICATION LABEL
The service parts identification label is provided on all
vehicle models. On the conventional cab models (G6H
and C7H), the label is located on the side all of the
cab behind the passengers seat if the cab has carpet
panels. If the cab does not have carpet panels, the
jabel ill be located at the lo er corner of the passen
gers side of the cab all.
The label is placed on the P6 and B7 models by the
body manufacturer.
The label lists the VIN (Vehicle Identification Number),
heelbase, paint information, and all production options
or special equipment on the vehicle hen it as
shipped from the factory. ALWAYS REFER TO THIS
INFORMATION WHEN ORDERING PARTS (figures 1
and 2).
15516776
NOTICE. THIS INFORMATION IS SUPPLIED AS AN AID IN IDENTIFYING PARTS FOR SERVICE
SERVICE PARTS REQUIREMENTS FOR THIS VEHICLE MAY VARY FROM THOSE LISTED
BEFORE ORDERING ANY OK THE ABOVE PARTS. ALWAYS HAVE YOUR GENERAL
MOTORS TRUCK DEALER CHECK THIS VEHICLE'S BROADCAST SUPPLEMENT FOR
POSSIBLE PART CHANGES.
IMPORTANT: RETAIN THIS PLATE AS A PERMANENT RECORD
B5559
Figure 1—Service Parts Identification Label

OA-2 GENERAL INFORMATION
1. Service Parts Label,
ithout Carpeting
2. Seryice Parts Label,
; ith Carpeting
F8012
Figure 2—Service Parts Label Location
VEHICLE IDENTIFICATION
V- NUMBER
The .VIN is the legal identifier of the vehicle. On :C6H
and C7H models, it is located on a plate that is
attached to the left top of the instrument panel and can
be seen through ithe indshield (figure 3). On P6 mod
els, it is located bn a plate in the engine compartment
on. the left side of the driver’s island (figure 4), On B7
models, it is located on the co l panel above the
engine compartment. To find out, the manufacturer,
1. Typical yIN
i | ■’ '' ; F7557
Figure 3—VINi Location (C6H and C7H Models)
Figure 4—VIN Location (P6 Models)
model and chassis type, engine type, GVW range, mod
el year, plant code, and sequential number, refer to
figure
VEHICLE CERTIFICATION LABEL
The vehicle certification label indicates the GVWR
(Gross yehicie Weight Rating), front and rear GAWR
(Gross Axle Weight Rating), and the, payload rating for
the vehicle (figures 6 and 7). : 7
The gross vehicle eight (GVW) is the eight of the
originally; equipped vehicle .and all items added, to it
j'

GENERAL INFORMATION OA-3
VEHICLE IDENTIFICATION NUMBER (VIN)
GM Make
Identifiers
1- United
States
2- Canada
General Motors
Series
Code
.GVWR And . Cab Type Engine Model .
Brake Systems ■ Code Code Year Code
Chassis
Type Code
Code Series
6 . .6000
- 7 • 7000
Code Description
T GMC
C Chevrolet
D GMC Incomplete. Vehicle
BChhev. Incomplete Vehicle
KGMC MPV
N Chev. MPV
AChev. Bus '
J GMC Bus
Check
Digit
1 G T M 7 H 1 M 1 P J 5 5 6 1
Plant
Code Sequential Numbers
2 3
1993 J-Janesville
Code Deecrlption Cab Type
H Medium
Conv. 104 in. BBC
PBus Chassis S7 Model (No Cab).
S Chassis Only P6 Model (No Cab)
TBus Chassis. B7 Model (No Cab)
Code Description
■1 ’ " 4x2 2 Axles'-1 Driving
,4 6x4 3 Axles 2 Driving
Code Engine Deecrlption
J ' CAT 3116 FI Diesel (6.6L)
MGM V8 EFI (7.0L)
P GM V8 EFI (6.0L)
Code GVWR-
Range
9001-10000
10001-14000
14001-16000
14001-16000
16001-19500
16001-19500
19501-23500
19501-23500
23501-26000
Brake
Syatem
Hydraulic'
Hydraulic
Hydraulic
Air
Hydraulic
Air
Hydraulic
■Air ‘
Hydraulic
Code GVWR
Range
23501-26000
26001-33000
26001-33000
33001 -40500
33001-40500
40501-48500
40501 -48500
48501-58000
58001-69500
69501 -over
Brake
System
Air
Hydraulic
Air
Hydraulic
- Air .
Hydraulic
Air
Air;
Air ■
- Air
V2495
Figure 5^-Vehicle Identification Chart
Figure 6—Complete Vehicle Certification Label
J . F9825
Figure 7—Incomplete Vehicle Certification Label
after it has left the factory. This ould include bodies,
inches, booms, etc., the driver and all occupants, and
the load the vehicle is carrying. The gross vehicle
eight (GVW) must not exceed the gross vehicle eight
rating (GVWR). Also, the front and rear gross axle
eights (GAW) must not exceed the front and rear
GAWR (Gross Axle Weight Rating).
The payload rating sho n on the. label is the maxi
mum allo able cargo load (including the eight of the
driver , and all occupants) that the vehicle can carry
based on ajl factory installed equipment on the vehicle.
The payload rating is reduced if any accessories or
other equipment-is added to the vehicle after final date
of manufacture. The eight of these items should be
determined and deducted from the payload rating.
The vehicle may also have a GCWR (Gross Combi
nation Weight Rating). The GCWR (Gross Combination
Weight Rating) is the total eight of the loaded to
vehicle (including passengers) and a loaded trailer.
The tires on the vehicle must be the proper size and
properly inflated for the load hich you are carrying.
The vehicle certification label sho s the originally
equipped tire size and recommended inflation pres
sures.
ENGINE IDENTIFICATION
NUMBER
DIESEL ENGINES
The Caterpillar 3116 diesel engine has the engine
serial number on a metal plate located on the upper left
rear corner of the engine block (figure 8):

QA-4 GENERAL INFORMATION
Figure ^Caterpillar Engine 3116 I.Di Plate Location
GASOLINE ENGINES
The 6.0L and 7[.0L engine serial number is located on
the engine block just in front of the right cylinder head.
The engine serial numberis also located at the left rear
corner of the engine block (figure 9).
' r e a r ; AXLE
I EENTIFIC ATION NUMBER
ROCKWELL
All Rock ell axles are identified ith t o tags: one
tag is located on the right side of the differential carrier,
and the other tag is on the right rear leg of the axle
housing. On a tandem axle, the rear/rear axle tag is
located on the axle housing cover (figure 10).

GENERAL INFORMATION OA-5
Figure 10—Rear Axle I.D. Location
EATON METRIC FASTENERS
All Eaton axles have an identification tag on the side
of the differential carrier (figure 10).
Differential Carrier Tag
The carrier tag contains the axle model, gear ratio,
carrier assembly number, carrier serial number, and
date of assembly. It is recommended hen referring to
the axle that all information recorded on these tags be
obtained to aid in identifying the axle assembly.
Axle Housing Tag
The housing tag is the same type of tag used for the
carrier, but ith separate serial and assembly I.D.num
bers and no ratio identification.
TRANSMISSION
IDENTIFICATION NUMBER
ALLISON
Allison transmission identification plate is located on
the housing rear left side, just above the oil pan (figure
11).
Current model GM vehicles are primarily dimensioned
in the metric system. Many fasteners are metric and are
very close in dimension to ell-kno n customary fas
teners in the inch system. It is most important that
replacement fasteners be of the correct nominal diame
ter, thread pitch, and strength.
Original equipment metric fasteners (except “beauty”
bolts, such as exposed bumper bolts and cross recess
head scre s) are identified by a number marking indi
cating the strength of the material in the fastener as
outlined later. Metric cross recess scre s are identified
by a Posidriv or Type ,1A. Either a Phillips head or Type
1A cross recess scre driver can be used in Posidriv
recess scre heads, but Type 1A cross recess scre 
drivers ill perform better.
Important
• Most metric fasteners have a blue color coating.
Ho ever, this should not be used as positive
identification, as some fasteners are not color
coated.
EATON-FULLER
Eaton-Fuller transmission identification plates are
located on the right rear side of the housing, near the
top cover (figures 12 and 13).
MODEL IDENTIFICATION
Models and body styles are listed in figures 14 and
15. ’ ' . 7 " ' - ■
General Motors Engineering Standards, along ith
other North American Industries, have adopted a por
tion of the Standard metric fastener sizes defined by
ISO (International Standards Organization). This as
'done to reduce the number of fastener sizes used and
yet .retain the best strength qualities in each thread
size. For example, the customary 1/4-20 and 1/4-28
scre s are replaced by the metric M6.0X1 scre hich

OA-6 GENERAL INFORMATION
Figure 11— Allison Transmission I.D. Location
(

GENERAL INFORMATION OA-7
F S
Synchronized—
x 100
L
L— Ratio Set
For ard Speeds
— Design Level
Nominal Torque Capacity
F9377
Figure 12—Eaton-Fuller Model FS transmission I.D.Location
R T ) - 11 6 09 A
Road ranger ---- 1 I J I— Ratio Set,
T in Countershaft—'I— For ard Speeds
Overdrive- — Design Level
x 100 = Nominal Torque Capacity
F9376
Figure 13—Eaton-Fuller Model RT Transmission I.D.Location

PA-8 GENERAL IN FORMATION
Figure 14—Model Identification; (C Models)
Figure 15—Model Identification (P6 Models)
has nearly the same diameter and has 25.4 threads per
inch. The thread pitch is in bet een the customary
coarse and fine thread pitches.
Metric and customary thread notations, differ slightly.
The difference is sho n in figure 16.
identifications embossed on each bolt head. Markings
correspond; |to t o lines less than the actual grade
(i.e.gradeij7:bplt ill exhibit 5 embossed radial lines on
the bolt |.Head). Some metric nuts are marked ith a
single dipitj lstrength identification number on the nut
face. To revie the different strength markings avail
able, refer to figure 17.
When replacing metric fasteners, be careful to use
bolts and nuts of the same strength or greater than the
original fasteners (the same number marking or higher).
Like ise', ;it is important to select replacement fasteners
of the bdrrept size. Correct replacement metric fasten
ers available in the aftermarket parts channels ere
designed; to metric standards of countries other than the
United States and may be of a lo er strength, may not
have the numbered head marking system, and may be
of a different thread pitch. The metric fasteners used on
GM products are designed to ne ,, international stan
dards that may not yet be manufactured by some
non-domestic bolt and nut suppliers. "
FASTENER STRENGTH
IDENTIFICATION
Most commonly used metric fastener strength proper
ty classes are 9.8 and 10.9 ith the class identification
embossed on the head of each bolt. Customary (inch)
strength classes range from grade 2 to 8 ith radial line
PREVAILING
TORQUE FAS
A prevailing torque nut is designed to develop an
interference bet een the nut and bolt threads. This is
most often accomplished by distortion of the top of an
all-metai nut or by using a nylon patch on the threads in
the middle of the hex flat. A nylon insert may also be
CUSTOMARY METRIC
1/4 — 20 M6.0 X 1
THREAD MAJOR
DIAMETER IN INCHES NUMBER OF THREADS
PER INCH THREAD MAJOR DIAMETER
IN MILUMETERS DISTANCE BETWEEN
THREADS IN MILLIMETERS
THREAD PITCH V1262
Figure 16—Thread Notation

GENERAL INFORMATION OA-9
used as a method of interference bet een nut and bolt
threads (figure 18).
A prevailing torque bolt is designed to develop an
interference bet een bolt and nut threads, or the
threads of a tapped hole. This is accomplished by dis
torting some of the threads or by using a nylon patch or
adhesive.
Recommendations For Reuse:
1. Clean, unrusted prevailing torque nuts and bolts '
may be reused as follo s:
A. Clean dirt and other foreign material off the nut
or bolt.
B. Inspect the nut or bolt to ensure there are no
cracks, elongation, or other signs of abuse or
overtightening. (If there is any doubt, replace
ith a ne prevailing torque fastener of equal
or greater strength).
C. Assemble the parts and hand start the nut or
bolt.
D. Observe that before the fastener seats, it devel
ops torque per the chart in figure 18 (if there is
any doubt, replace ith a ne prevailing torque
fastener of equal or greater strength).
E. Tighten the fastener to the torque specified in
the appropriate section of this manual.
2. Bolts and nuts that are rusty or damaged should be
replaced ith ne parts of equal or greater
strength.
METRIC-ENGLISH CONVERSION
For determining metric and english conversions, refer:
to figure 19.
DECIMAL AND METRIC
EQUIVALENTS
For determining decimal and metric equivalents, refer
to figure 20. J1930 WORD
CONVERSION
Starting ith the 1993 model year, General Motors
ill be complying ith the Society of Automotive Engi
neers (SAE) Recommended Practice J1930, J1930 is
an industry ide standard that as adopted into gov-
1 2 3 4
1. Grade 2 (GM 260-M)
2. Grade 5 (GM 280-M)
3. Grade 7 (GM 290-M)
4. Grade 8 (GM 300-M)
5. Manufacturer’s Identification .
6. Nut Strength Identification
7. Identification Marks (Posidriv Scre Head)
VI263
Figure 17—Fastener Strength Markings
(Identification)
ernment regulations and requires certain electrical and
electronic components and systems be kno n by the
same nomenclature that have the same function. This
standard is also being applied to abbreviations and
acronyms. This standard is being used in all 1993 GM
service publications.
To make this standard ork, some names and abbre
viations are being replaced ith those.recommended by
the SAE standard.
For determining J1930 ord conversions, refer to fig
ure 21.

PA-10 GENERAL MN FORM AT ION
FASTENER
TYPE TORQUE UNITS METRIC SIZE FASTENERS
6 & 6.3 8 10 12 14 ’ 16 20
4,5 I
IN-m 0.4. 0.8 1.4 2.2 3.0 4.2 7.0
. In. Lbs. 4.0 7.0 12 18 25 35 57
1,2, 3, 6,
7,8,9 N-m 0.4 0.6 1.2 1.6 2.4 3.4 5.6
In. Lbs. 4.0 5.0 .1 0 14 20 28 46
FASTENER
TYPE I TORQUE
UNITS INCH SIZE FASTENERS 0.250 0.312 0.375 0.437 . 0.500 0.562 0.625 0:750
4, 5
* , ' -J
lN-m 0.4 0.6 1.4 1.8 2.4 3.2 , 4.2 6.2
In. Lbs. 4.0 5.0 12 , 15 : 20 27 v 35 51
1,2, 3, 6,
8, 9 ;; N-m 0.4 0.6 1.0 1.4 1.8 2.6 3.4 5.2
In. Lbs. 4.0 5.0 9.0 12 : 15 22 28 ; 43
1. Top Lock Type
2. Center Lock
3. Dry Adhesive Coating
4. Out Of Round Thread
5. Deformed Thread Profile
/ . ;V. F8432
Figure 18-^-Prevailing Torque Nuts and Bolts
; 6. Nylon Strip Or Patch
7. Nylon Washer insert
8 Nylon Patch
9. Nylon Insert
@ © & H D
1
i •
® (E D (££)
- 2 :
3' " 4 ■'
CED
9 \
i
@ CED P
8
6 .. , 5
v jO .. © ;<H> ; ;

Figure 19—Metric-English Conversion Table
CONVERSION TABLE
Multiply by to get equivalent
number of: Multiply by to get equivalent
number of:
LENGTH ACCELERATION
Inch
Foot
Yard
Mile
lnch?
Foot2
Yard2
25.4 millimeters (mm)
0.304 8 meters (m)
0.914 4 meters
1.609 kilometers (km)
AREA
645.2 millimeters2 (mm2)
6.45 centimeters2 (cm2)
0.092 9 meters? (m2) *
0.8361 meters? i
VOLUME
Foot/sec2
Inch/sec2 0.3048 meter/sec2 (m/s2)
0.025 4 : meter/sec2
TORQUE
Pound-inch
Pound-foot 0.112 98
1.355 8
POWER
; ne ton-meters,(Nm)
ne ton-meters
'
Horsepo er . 0.746 kilo atts (kW) :
PRESSURE OR STRESS
Inches of ater
Pounds/sq. in. 0.249 1 kilopascals (kPa)
6.895 f kilopascals
ENERGY OR WORK
Inch3
Quart 0.946 4
Gallon
Yard3
16.387
16.387
0.016 4
liters
3.785 4
0.764 6
MASS
mm3
cm3
liters (1)
liters
meters3 (m3)
BTU
Foot-pound
Kilo att-hour
1 055
1.355 8
3 600 000
or 3.6 x 106
LIGHT
joules (J)
joules
joules (J * one W)
Pound 0.453 6 kilograms (kg) Foot candle 1.076 4 lumens/meter2 (lm/m2)
Ton 907.18, kilograms (kg) FUEL PERFORMANCE
Ton 0.907 tonne (t) Miles/gal 0.4251 kilometers/liter (km/l).
FORCE Gal/mile 2.352 7 liter/kilometer (l/km) •
Kilogram 9.807 ne tons (N) VELOCITY
Ounce 0.278 0 ne tons Miles/hour 1.609 3 kilometers/hr. (km/h):
Pound 4.448 ne tons
TEMPERATURE
Degree
Fahrenheit (t°F-32)'-r 1.8 degree Celsius (C)
GENERAL INFORMATION OA-11

Figure 20—Decimal and Metric Equivalents
DECIMAL AND METRIC EQUIVALENTS
Fractions Decimal In. Metric mm Fractions Decimal In. Metric mm
1/64 0.015625 0.39688 33/64 0.515625 13.09687
1/32 0.03125 0.79375 17/32 0.53125 13.49375
3/64. 0.046875 1,19062 35/64 0.546875 13.89062
1/16 0.0625 1.58750 9/16 0.5625 14.28750
5/64 0.078125 1.98437 37/64 0.578125 14.68437
, 3/32 0.09375 2.38125 19/32 0.59375 15.08125
7/64 0.109375 2.77812 39/64 0.609375 15.47812
1/8 0.125 3.1750 5/8 0.625 15.87500
9/64 0.140625 3.57187 41/64 0.640625 16.27187
5/32 0.15625 3.96875 21/32 0.65625 16.66875
11764 0.171875 4.36562 43/64 0.671875 17.06562
3/16 0.1875 4.76250 11/16 0.6875 17.46250
13/64 0.203125 .
.... 5.15937 45/64
----------
0:703125 17.85937
7/32 0.21875 5.55625 23/32 • 0.71875 18.25625 :
15/64 0.234375 " 5.95312 47/64 0.734375. : 18.65312'
. 1/4 0.250 6.3500 3/4 0.750 19.05000
17/64 0.265625 6.74687 49/64 0.765625 19.44687
9/32 0.28125 7.14375 25/32 0.78125 19.84375
19/64 0.296875 7.54062 51/64 0.796875 20.24062
5/16 0.3125 7.93750 13/16 — 0.8125 20.63750
21764 0.328125 8.33437 :■ 53/64 7 0.828125 - - 21.03437
11/32 ; 0.34375 8.73125 27/32 - 0.84375 21.43125
23/64 0.359375 9.12812 55/64 0.859375 21.82812
3/8 0.375 9.52500 7/8 0.875 22.22500
25/64 0.390625 9.92187 57/64 0.890625 22.62187
13/32 0.40625 10.31875 29/32 0.90625 23.01875
27/64 0.421875 10.71562 59/64 0.921875 23.41562
7/16 0.4375 11.11250 15/16 0.9375 23.81250
29/64 0.453125 11.50937 61/64 0.953125 24.20937
15/32 0.46875 11.90625 31/32 0.96875 24.60625
31/64 0.484375 12.30312 63/64 0.984375 25.00312
1/2 0.500 12.7000 1 1.00. 25.40000
CD
OA-12 GENERAL INFORMATION

GENERAL INFORMATION OA-13
J1930 CONVEIRSION CHART
From To ;
Absolute Pressure Sensor (APS) Manifold Absolute Pressure Sensor (MAP.Sensor)
Accelerator (ACCEL) Accelerator Pedal (AP) l ■
Air Cleaner Assembly Air Cleaner (ACL) % j
Air Cleaner Filter Element Air Cleaner Filter (ACL Filter)
Air Induction System Air Intake System
Air Injection Reaction System (A.I.R. System) Secondary Air Injection'System (AIR System)
Assembly Line Communication Link (ALCL) . Data Link Connector (DLC)
Assembly Line Data Link (ALDL) .. . Data Link Connector (DLC) .
BCM-PCM Data Problem BCM-PCM Data Link
Calibration Pack (CAL-PAK) 1. Electronically Erasable Programmable Read Only
Memory (EEPROM)
2. Erasable Programmable Read Only Memory
(EPROM) ' :
3. Programmable Read Only Memory (PROM)
Camshaft Sensor Camshaft Position Sensor (CMP Sensor)
Canister Purge (CP) Evaporative Emission Canister Purge (EVAP Canister
Purge)
Catalytic Converter (Cat. Conv.) 1. Oxidation Catalytic Converter (OC)
2. Three Way Catalytic Conveter (TWC)
3. Three Way and Oxidation Catalytic Converter
(TWC&OC)
4. Warmup Oxidation Catalytic Converter (WU-OC)
5. Warmup Three Way Catalytic Converter
(WU-TWC)
Check Engine Indicator , ; Malfunction Indicator Lamp (MIL)
Code Diagnostic Trouble Code (DTC)
Computer Controlled Coil Ignition (C3I) : Electronic Ignition (El)
Computer Command Control (CCC) Engine Control Module (ECM)
Controlled Canister Purge (CCP) : , Evaporative Emission Canister Purge (EVAP Canister
Purge)
Coolant Temperature S itch (CTS) . Engine Coolant Temperature S itch (ECT S itch)
Coolant Temperature Sensor (CTS) Engine Coolant Temperature Sensor (ECT Sensor)
Cooling Fan Control Cooling Fan Control (Cooling FC)
Detonation Sensor Knock Sensor (KS)
Diagnostic Circuit Check : Onboard Diagnostic System Check (OBD System
Check)
Digital Fuel Injection (DFI) 1.. Multiport Fuel Injection (MFI)
2. Sequential Multiport Fuel Injection, (SFI)
Digital Electronic Fuel Injection (DEFI) 1. Multiport Fuel Injection (MFI) .
2. Sequential Multiport Fuel Injection (SFI)
Direct Ignition System (DIS) Electronic Ignition System (El System)
Distributor HEI Module Distributor Ignition Control Module (Dl Control Module)
Distributorless Ignition System (DIS) Electronic Ignition (El)
Dual Bed Monolith (DBM) 1. Oxidation Catalytic Converter (OC)
2. Three Way Catalytic Converter (TWC)
Electric Air Control (EAC) Secondary Air Injection Bypass Valve (AIR Bypass
Valve)
Electric Air S itching (EAS) Secondary Air Injection S itching Valve (AIR, S itching
Vaive)
Electronic Control Module (EGM) Engine Control Module (ECM)
Electronic Fuel Injection 1. Multiport Fuel Injection (MFI)
2. Sequential Multiport Fuel Injection (SFI)
3. Throttle Body Fuql Injection (TBI)
Electronic Spark Timing (EST) Ignition Control (IC)
Electronic Spark Timing Circuit (EST Circuit) Ignition Control Circuit (IC Circuit)
Electronic Spark Timing System (EST System) Distributor Ignition System (Dl System)

PA-14 GENERAL INFORMATION
J1930 CONVERSION CHART
From To ■
Electronic Spark Control Circuit (ESC Circuit) ;Knock Sensor Circuit (KS Circuit)
Electronic Spark Control System (ESC System) ;Knock Sensor System (KS System)
Electronic Vacuum Regulator Valve (EVRV) Exhaust Gas Recirculation Electronic Vacuum Regula
tor Solenoid Valve
Engine Calibration Unit (ECU) : : :: Programmable Read Only Memory (PROM)
Evaporative Emission Control System (EEGS) . Evaporative j Emission Control System (EVAP Control
System)'; | ;■
Evaporative Emission Control System (EECS) Evaporatiyie, Emission System (EVAP System)
Exhaust Gas Recirculation/Thermostatic Vacuum
S itch (EGR/TVS) Exhaust Gas Recirculation Thermal Vacuum Valve
(EGR TVV) ;
Fuel Cal-Pak Missing PROM Missing
Generator (Gen) i i, IGenerator (GEN)
Governor , / ! Engine Spee^d Governor (RPM Governor)
High Energy Ignition (HEI) Distributor Ignition (Dl)
Lean Exhaust ■ ■1. Heated Oxygen Sensor Signal (H02S Signal)
2. Oxygen Sensor Signal (02S Signal)
Manifold Air Temperature Sensor (MAT Sensor) Intake Air Temperature Sensor (I AT Sensor)
Mem-Cal Error 1. EPRQM Error
2. PROM Error
Memory and Calibration Unit (MEM-CAL). 1. Erais'ab;le Programmable Read Only Memory
(EPR0M):
2. Programmable Read Only Memory (PROM)
Mixture Control (M/C) Mixture Control (MC)
Multi-Port Fuel Injection (MPFI) Multiport Fuel Injection (MFI)
Nitrogen Oxides (NO,) Nitrogen Oxides (NOx)
Oxygen (0?) Oxygen (02) t
Oxygen Sensor (02) 1. Heated Oxygen Sensor (H02S)
2. Oxygehi Sensor (02S)
Park/Neutral S itch (P/N S itch) Park/Neutral i postion S itch (PNP S itch)
Port Fuel Injection (PFI) Multiport; Ftielj Injection (MFI)
Po er Steering (P/S) , Po er Steering (PS)
Po er Steering S itch Po er Steering Pressure S itch (PSP S itch)
Pulse Air Injection System (PAIR). Pulsed Secondary Air Injection System (PAIR System)
Revolutions Per Minute (RPM) Engine Speed (RPM)
Rich Exhaust j1. Heated ipxygen Sensor Signal (H02S Signal)
2. Oxygen ; Sensor Signal (02S Signal) .
“Scan” Data , . MScan Tool Data (ST Data)
Sequential Fuel Injection (SFI) , jSequential Multiport Fuel Injection (SFI)
Sequential-port Fuel Injection (SFI) Sequential! Multiport Fuel Injection (SFI)
Service Engine Soon Indicator (SES Indicator) Malfunction . Indicator Lamp (MIL)
Thermal Vacuum S itch (TVS) • Thermal Vacuum Valve (TVV)
Thermostatic Air Cleaner (TAC) Air Cleaneri(ACL)
Throttle Body Injection (TBI) ! Throttle Body Fuel Injection (TBI)
Throttle S itch ■ . !, 1. Closed! Throttle Position S itch (CTP S itch)
2. Widejpjpen Throttle S itch (WOT S itch)
Throttle Position ^Sensor (TPS) Throttle Position Sensor (TP Sensor)
Throttle Position S itch (TPS) 1. Closed Throttle Position S itch (CTP S itch)
2. Wide Open Throttle S itch (WOT S itch)
Tuned Port Injection (TPI) ; , Multiport Fuel Injection (MFI)
TransmissionTransaxle Converter Clutch (TCC) , Torque Converter Clutch (TCC)
Viscous Converter Clutch (VCC) ;;; Torque Converter Clutch (TCC)
^ T2934
Figure 21—J1930 Conversion Chart