Isuzu N-Series. Service manual — part 833
GENERAL INFORMATION 0A-17
TERMS AND ABBREVIATIONS
Term Definition
Abbreviations Charts
TERM
DESCRIPTION
DIMENSION
The standard dimension values to be observed when manufacturing.
STANDARD
The standard values to be observed when carrying out service operations, including inspection,
adjustment, assembly and installation.
LIMIT
The maximum or minimum values, which must not be exceeded when service operations are car-
ried out.
If this value is exceeded, replacement or repair is required.
WARNING:
If not observed, danger of death or serious injury will result.
CAUTION:
If not observed, danger of injury or accident will result.
IMPORTANT:
If not observed, normal performance of relevant parts and system is not guaranteed, and failure
of the vehicle may result.
NOTE:
Matters, which should be specially mentioned.
ABBREVIATION
DESCRIPTION
2L
2L Shoe Brake
2WD, 4
×2
Two Wheel Drive
4WD, 4
×4
Four Wheel Drive
A/C
Air Conditioning
A/F
Air Fuel Ratio
A/T, AT
Automatic Transmission
ABDC
After Bottom Dead Center
ABS
Antilock Brake System
AC
Alternating Current
ACC
Accessory
ACG
Alternating Current Generator
ACL
Air Cleaner
ACT
Actuator
ANT
Antenna
AP
Accelerator Position
API
American Petroleum Institute
ASM (Assy)
Assembly
ASR
Anti-slip Regulator
ASSIT
Assistant / Assist
ATDC
After Top Dead Center
ATF
Automatic Transmission Fluid
B/K
Brake
B+
Battery Positive Voltage
BAL
Balance
BAT, BATT
Battery
BBDC
Before Bottom Dead Center
BJ
Birfield Joint
BKT, BRKT
Bracket
BRG, Brg
Bearing
BTDC
Before Top Dead Center
C/B
Circuit Braker
C/U
Control Unit
CAM
Camshaft
CAN
Control Unit Communication
Type
CFS
Clutch Free System
CKP
Crankshaft Position
CMP
Camshaft Position
CNG
Compressed Natural Gas
CO
Carbon Monoxide
CONN
Connector
CPU
Central Processing Unit
CSD
Cold Starting Device
D2L
D2L Shoe Brake
DC
Direct Current
DD
Direct Drive
DFI
Diesel Fuel Injection
DI
Direct Injection
DLC
Data Link Connector
DMM
Digital Multi-meter
DOJ
Double Offset Joint
DPF
Diesel Particulate Filter
ABBREVIATION
DESCRIPTION
0A-18 GENERAL INFORMATION
DTC
Diagnostic Trouble Code
DVM
Digital Voltage Meter
E/B
Exhaust Brake
ECM
Engine Control Module
ECT
Engine Coolant Temperature
ECU
Engine Control Unit
EDU
Engine Driver Unit
EEPROM
Electrically Erasable and Pro-
grammable Read Only Memory
EGR
Exhaust Gas Recirculation
EHCU
Electronic Hydraulic Control Unit
EMI
Electromagnetic Interference
ESD
Electrostatic Discharge
EVAP
Evaporation
EVRV
Electric Vacuum Regulating
Valve
Exh, EXH
Exhaust
F/B
Feedback
F/C
Fuel Cut
F/L, FL
Fusible Link
FCS
Fuel Cut System
FICD
Fast Idle Control Device
FIO
Fast Idle Open
FLW
Fusible Link Wire
FRZ
Freezer
FT
Fuel Temperature
Ft, FRT
Front
FWD
Front Wheel Drive
GEN
Generator
GND
Ground
GVW
Gross Vehicle Weight
GVM
Gross Vehicle Mass
H/L
Head Lamp
HAB
Hydraulic Assist Brake
HC
Hydrocarbons
HD
Heavy Duty
HID
High Intensity Discharge Head-
lamp
HO 2 S
Heated Oxygen Sensor
HAS
Hill Start Aid
HT
Hypoid Tandem
HUD
Head-Up Display
ABBREVIATION
DESCRIPTION
HVAC
Heater Ventilation Air Condi-
tioner
I/PUMP, I/P
Injection Pump
IAC
Idle Air Control
IAT
Intake Air Temperature
IC
Integrated Circuit
ID Plate
Identification Plate
IGN / IG
Ignition
IN
Intake
INJ
Injection
ISC
Idle Speed Control
ISM
Intake Step Motor
ISO
International Standardization
Organization
ISP
Intake Shutter Position
ITP
Intake Throttle Position
J/B
Junction Block
J/C
Joint Connector
JIS
Japan Industrial Standards
L/H, LH
Left-Hand
LCD
Liquid Crystal Display
LED
Light Emitting Diode
LEV
Low Emission Vehicle
LPG
Liquefied Petroleum Gas
LSD
Limited Slip Differential
LSPV
Load Sensing Proportioning
Valve
LT
LT Shoe Brake
LWB
Long Wheel Base
M/T, MT
Manual Transmission
M/V
Electromagnetic Valve
MAP
Manifold Absolute Pressure
Max
Maximum
MIL
Malfunction Indicator Lamp
Min
Minimum
MPU
Micro Processing Unit
NC
Normally Closed
NE
Engine RPM
NO
Normally Open
Nox
Nitrogen Oxides
O/D
Over Drive
O2S
O2 Sensor
ABBREVIATION
DESCRIPTION
GENERAL INFORMATION 0A-19
Introduction of SI (International System of
Unit)
The SI was founded with an aim to standardize various
unit systems, e.g. the metric system, pound system etc.,
and to get rid of complicated conversion of units using
calculators.
Introduction of the SI in Japan is standardized in JIS-Z-
8203.
In this manual, all the units are indicated based on the
International System of Units, along with conventional
units in ( ).
• SI is the abbreviation of “Le Systeme Internationale
d’Unites.”
OBD
Onboard Diagnosis
ODM
Output Driver Module
OEM
Original Equipment Manufactur-
ing
OHC
Overhead Camshaft
OHV
Overhead Valve
OPT
Option
OT
Oil Temperature
P
Poles
P/L, PL
Pilot Lamp
P/S
Power Steering
PCM
Power Train Control Module
PCV
Positive Crankcase Ventilation
P-I
Proportion / Integration
PID
Control Type
PM
Particulate Matter
POS
Position
PTO
Power Take Off
PWM
Pulse Width Modulation
Q
Quantity (Fuel Injection Quan-
tity)
QDM
Quad Driver Module
QOS
Quick On Start Module
QWS
Quick Warming Up System
R/H, RH
Right-Hand
R/L
Relay
RAM
Random Access Memory
REF
Reference
RET
Retarder
REV
Reverse
ROM
Read Only Memory
RP
Rail Pressure
Rr, RR
Rear
RWD
Rear Wheel Drive Vehicle
S/M
Step Motor
SAE
Society of Automotive Engineers
SBF
Slow Blow Fuse
SCV
Suction Control Valve
SIG
Signal
SLD
Shield
SPV
Spill Control Valve
SRS
Supplemental Restraint System
ABBREVIATION
DESCRIPTION
ST
Starter / Start
STD
Standard
STRG
Steering
SW
Switch
SWB
Short Wheel Base
T/F
Transfer
TCC
Torque Converter Clutch
TCM
Transmission Control Module
TCV
Timing Control Valve
TDC
Top Dead Center
TEMP
Temperature
TFT
Transmission Fluid Temperature
TP
Throttle Position
TWV
Two Way Valve
V/P
Vacuum Pump
VB
Battery Voltage
Vcc
Collector Voltage
VCI
Vehicle Communication Inter-
face
VIM
Vehicle Interface Module
VIN
Vehicle Identification Number
VOL, Vol.
Volume
VSS
Vehicle Speed Sensor
VSV
Vacuum Switching Valve
W/B, WB
Wheel Base
W/H
Wire / Harness
W/L
Warning Lamp
WOT
Wide Open Throttle
ABBREVIATION
DESCRIPTION
0A-20 GENERAL INFORMATION
STANDARD BOLTS TIGHTENING
Isuzu Standard Fixing Torque Specifications
The torque values given in the following table should be applied where a particular torque is not specified.
N
⋅m (kg⋅m/lb⋅ft)
Strength Class
4.8
4T
7T
Bolt Identification
Hexagon Head Bolt
Flange Bolt
Hexagon Head Bolt
Flange Bolt
M6
× 1
3.9 — 7.8
(0.4 — 0.8/2.9 — 5.8)
4.6 — 8.5
(0.5 — 0.9/3.4 — 6.3)
4.9 — 9.8
(0.5 — 1.0/3.6 — 7.2)
5.7 — 10.6
(0.6 — 1.1/4.2 — 7.8)
M8
× 1.25
7.8 — 17.7
(0.8 — 1.8/5.8 —
13.1)
10.5 — 19.6
(1.1 — 2.0/7.7 —
14.5)
11.8 — 22.6
(1.2 — 2.3/8.7 —
16.7)
13.5 — 25.0
(1.4 — 2.5/10 —
18.4)
M10
× 1.25
20.6 — 34.3
(2.1 — 3.5/15.2 —
25.3)
23.1 — 38.5
(2.4 — 3.9/17 —
28.4)
27.5 — 46.1
(2.8 — 4.7/20.3 —
34)
31.0 — 51.7
(3.2 — 5.3/22.9 —
38.1)
*M10
× 1.5
19.6 — 33.3
(2.0 — 3.4/14.5 —
24.6)
22.3 — 37.2
(2.3 — 3.8/16.4 —
27.4)
27.5 — 45.1
(2.8 — 4.6/20.3 —
33.3)
30.3 — 50.4
(3.1 — 5.1/22.3 —
37.2)
M12
× 1.25
49.0 — 73.5
(5.0 — 7.5/36.1 —
54.2)
54.9 — 82.3
(5.6 — 8.4/40.5 —
60.7)
60.8 — 91.2
(6.2 — 9.3/44.8 —
67.3)
68.1 — 102.1
(6.9 — 10.4/50.2 —
75.3)
*M12
× 1.75
45.1 — 68.6
(4.6 — 7.0/33.3 —
50.6)
51.0 — 76.5
(5.2 — 7.8/37.6 —
56.4)
56.9 — 84.3
(5.8 — 8.6/42 —
62.2)
62.7 — 94.0
(6.4 — 9.6/46.2 —
69.3)
M14
× 1.5
76.5 — 114.7
(7.8 — 11.7/56.4 —
84.6)
83.0 — 124.5
(8.5 — 12.7/61.2 —
91.8)
93.2 — 139.3
(9.5 — 14.2/68.7 —
102.7)
100.8 — 151.1
(10.3 — 15.4/74.3 —
111.4)
*M14
× 2
71.6 — 106.9
(7.3 — 10.9/52.8 —
78.8)
77.2 — 115.8
(7.9 — 11.8/56.9 —
85.4)
88.3 — 131.4
(9.0 — 13.4/65.5 —
96.9)
94.9 — 142.3
(9.7 — 14.5/70 —
105)
M16
× 1.5
104.0 — 157.0
(10.6 — 16.0/76.7 —
115.8)
115.6 — 173.3
(11.8 — 17.7/85.3 —
127.8)
135.3 — 204.0
(13.8 — 20.8/99.8 —
150.5)
150.1 — 225.2
(15.3 — 23.0/110.7
— 166.1)
*M16
× 2
100.0 — 149.1
(10.2 — 15.2/73.8 —
110)
109.4 — 164.2
(11.2 — 16.7/80.7 —
121.1)
129.4 — 194.2
(13.2 — 19.8/95.4 —
143.2)
142.5 — 213.8
(14.5 — 21.8/105.1
— 157.7)
M18
× 1.5
151.0 — 225.6
(15.4 — 23.0/111.4
— 166.4)
—
195.2 — 293.2
(19.9 — 29.9/144 —
216.3)
—
*M18
× 2.5
151.0 — 225.6
(15.4 — 23.0/111.4
— 166.4)
—
196.1 — 294.2
(20.0 — 30.0/144.6
— 217)
—
M20
× 1.5
206.0 — 310.0
(21.0 — 31.6/151.9
— 228.6)
—
269.7 — 405.0
(27.5 — 41.3/198.9
— 298.7)
—
*M20
× 2.5
190.2 — 286.4
(19.4 — 29.2/140.3
— 211.2)
—
249.1 — 374.6
(25.4 — 38.2/183.7
— 276.3)
—
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