fuel ratio JAGUAR X308 1998 2.G Workshop Manual

                              
                                                                                   Valve
 Co
ver 
LH (12.29.43)  
                     Valve
 Cover  RH (12.29.44)  
                     Valve
 Cover  Gasket  LH  (12.29.40)  
                     Valve
 Cover Gasket  RH  (12.29.41)  
                     Valve
 Springs  LH 
                     Valve
 Springs  RH 
                     Variable
 Camshaft  Timing  Oil  Con
trol Unit  LH  (12.65.71)  
                     Variable
 Camshaft  Timing  Oil  Control  Unit  RH  (12.65.70)  
                     Variable
 Camshaft  Timing  Oil  Control  Unit  Housing  LH  (12.65.52)  
                     Variable
 Camshaft  Timing  Oil  Control  Unit  Housing  RH  (12.65.51)  
 
             303‐03A : Engine  Cooling  
                 Descriptio
n and  Operation  
                     Engine Cooling  
                 Diagnosis  and  Testing  
                     Engine Cooling  
                     Related Faults  /  Codes  
                     DTC P0116  ECT  circuit  range  / performance  problem 
                     DTC P0125  Insufficient  coolant  temperature  for  closed  loop  fuel control  
                     DTC P0117  ECT  circuit  low  input  
                     DTC P0118  ECT  circuit  high  input  
                     DTC P1474  Intercooler  coolant  pum
p relay  malfunction  
                     Pinpoint test  A: P0116,  P0125  
                     Pinpoint test  B: P0117  
                     Pinpoint test  C: P0118  
                     Pinpoint test  D: P1474  
                 General Procedures  
                     Cooling System  Draining,  Filling and  Bleeding  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  –  
            AJ27 
                     Cooling System  Draining,  Filling and  Bleeding  ‐ 4.0L  SC  V8  ‐ AJ26  
                     Cooling Sy
stem  Draining  and  Vacuum  Filling  
                 Removal and  Installation  
 
Removal
 
Engine  ‐ Re m
oval
 (12.41.01)  
Installation  
Engine  ‐ Installation  (12.41.01)  

                Removal and  Installation  
                     Fuel Injection  Supply  Manifo ld LH
 
(19.60.05)  
                     Fuel Injection  Supply  Manifold  RH  (19.60.04)  
                     Fuel Injection  Supply  Manifold  Pipe  (19.41.04)  
                     Fuel Injector  Vehicles  Without:  Supercharger  (18.10.01)  
                     Fuel Injector  Vehicles  With: Supercharger  (18.10.01) 
                     Fuel Injectors  Vehicles  With:  Supercharger  (18.10.02) 
                     Throttle Body  (19.70.04)  
                     Throttle Body  Gasket  (19.70.07)  
 
             303‐05:  Accessory  Drive  
                 Descriptio
n and  Operation  
                     Accessory Drive  
                 Removal and  Installation  
                     Accessory Drive  Belt (12.10.40)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt (12.10.40)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Accessory Drive  Belt Idler  Pulley  (12.10.43)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt  Idler  Pulle
y (12.10.43)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Accessory Drive  Belt Tensioner  (12.10.41)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt Tensioner  (12.10.41)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Supercharger  Belt  (18.50.08)  
                     Supercharger  Belt  Idler  Pulley  (18.50.09)  
                     Supercharger  Belt  Tensioner  (18.50.24)  
 
             303‐06:  Starting  System  
                 Description  and  Operati
on 
                     Starting System  
                 Diagnosis  and  Testing  
                     Starting System  
                 Inspection  and Verification  
                     Diagnostic Trouble  Code  (DTC)  Index  
                     Pinpoint Tests  
                 Removal and  Installation  
                     Starter Motor  (86.60.01)  
 
  

                    Superchar
ger
 Outlet  Pipe (18.50.16)  
                     Supercharger  Outlet  Pipe Gasket  (18.50.17)  
                     Throttle Body  Elbow  (19.70.28)  
                     Throttle Body  Elbow  Gasket  (19.70.29)  
 
             303‐13:  Evaporative  Emissions  
                 Diagnosis  and  Testing  
                     Evaporative  Emissions 
                                       
Preliminary
 Inspection
 
                     Diagnostic
 Drive  Cycles  
                     Diagnostic
 Trouble  Code  (DTC)  index/Symptom  Chart  
                     Pinpoint
 Tests  
                 Removal
 and  Installation  
                     Evaporative 
Emission Canister  (17.15.13)  
                     Evaporative 
Emission Canister  Purge  Valve (17.15.30)  
                     Fuel
 Tank  Press
ure Sensor  (19.55.31)  
                     Fuel
 Vapor  Vent  Valve  Housing  (19.55.24)  
                     Fuel
 Vapor  Vent  Valve  Housing  Seal  (19.55.25)  
 
             303
‐14:  Electronic  Engine  Controls  
                 Description
 and
 
                                      Diagnosis
 and  Testing  
                     Electronic
 Engine  Con
trols  
                     Inspection
 and  Verification  
                     Driver
 Information  Chart  
                     Default 
mode Definitions  
                     Diagnostic
 Trouble  Code  (DTC)  Index  
                     Pinpoint
 Tests  
                 Removal
 and  Installation  
                     Catalyst 
Monitor  Sensor LH  (18.30.81)  
                     Catalyst 
Monitor  Sensor RH  (18.30.80)  
                     Heated Oxygen  Sensor  (HO2S)  LH  (18.30.79)  
                    
Heated Oxygen  Sensor  (HO2S)  RH  (18.30.78)  
                    
                    
Camshaft  
Position  
Sen s
or
 
ECM  
Position  
Sensor  
Crankshaft
Removal
Engine  
Coolant Temperature
Sensor 
Operation
Intake  Air  Temperature  (IAT)  Sensor  (18.
30.52)  

        309: Exhaust  Syst
em
 
 
             309‐00:  Exhaust  System 
                 Specification  
                 Description  and  Operation  
                     Exhaust System  
                 Diagnosis  and  Testing  
                     Exhaust System  
                 Removal and  Installation  
                     Catalytic Converter  LH  (17.50.15)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Catalytic Converter  LH  (17.50.15)  ‐ 4.0L  SC  V8 ‐ AJ26,  Vehicles  With:  
            Supercharger  
                     Catalytic Converter  RH  (17.50.16)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Catalyt
ic Converter  RH  (17.50.16)  ‐ 4.0L  SC  V8 ‐ AJ26,  Vehicles  With:  
            Supercharger  
                     Catalytic Converter  Gasket  LH  (17.50.06)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Catalytic Converter  Gasket  LH  (17.50.06)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Catalytic Converter  Gasket  RH  (17.50.07)  ‐ 3.2L  NA V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Catalyt
ic Converter  Gasket  RH  (17.50.07)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Front Muffler  (30.10.18)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Front Muffler  (30.10.18)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Intermediate  Muffler LH  (30.10.15)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Intermediate  Muffler LH  (30.10.15)  ‐ 4.0L  SC  V8 ‐ AJ
26  
                     Intermediate  Muffler RH  (30.10.16)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Intermediate  Muffler RH  (30.10.16)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Muffler and Tailpipe  LH (30.10.22)  
                     Muffler and Tailpipe  RH (30.10.52)  
 
        310:  Fuel  System  
 
             310‐00:  Fuel  System  ‐ General  Information  
                 General Procedures  
                     Fuel System  Pressure  Check  
                     Fuel Tank  Draining  
 
  
Fuel  Sy stem  Pres
sure
 Release  

            310‐01:  Fu el Tank  and  Lines  
                 Removal and  Installation  
                     Fuel Level  Sensor  (88.25.32)  
                     Fuel Pump  (19.45.08)  
                     Fuel Tank  (19.55.01)  
 
             310‐02
:
 Acceleration  Control  
                 General Procedures  
                     Accelerator  Cable  Adjustment  (12.20.05)  
                 Removal and  Installation  
                     Accelerator  Cable  (19.20.06)  
 
             310‐03:  Speed  Control  
                 Diagnosis  and  Testing  
                     Speed Con
trol 
 
    4:  Electrical  
 
        412:  Climate  Control  System  
 
             412‐00:  Climate  Control  System  ‐ General  Information 
                 Specification  
                 Description  and  Operation  
                     Climate Control System  
                 Diagnosis  and  Testing  
                     Climate Control System  
                 General Procedures  
                     Air Conditioning  (A/C)  System  Check ‐  Retail Procedure  
                     Air Conditioning  (A/C)  System  Recovery,  Evacuation  and  Charging  (82.30.30)  
                     Contaminated  Refrigerant  Ha
ndling  
                     Manifold Gauge  Set Connection  
                     Refrigerant  Adding (82.30.02)  
                     Refrigerant  Oil Adding  
                     Refrigerant  System Tests  
 
             412‐01:  Air  Distribution  and  Filtering  
                 Description  and  Operation  

                Removal and  Installation  
                     Door (76. 28.04)  
                     Front Doo
r 
Opening  Weatherstrip  (76.40.01)  
                     Fuel Filler  Door  (76.10.25)  
                     Hood (76.16.01)  
                     Hood Hinge  (76.16.12)  
                     Hood Striker  (76.16.24)  
                     Hood Strut  (76.16.15)  
                     Luggage Compartment  Lid Hinge  (76.19.28)  
                     Luggage Compartment  Lid Opening  Weatherstrip  (76.19.06)  
                     Luggage Compartment  Lid Striker  (76.19.12)  
                     Luggage Compartment  Lid Strut  (76.19.27)  
                     Rear Door  Opening  Weathe
rstrip (76.40.02)  
 
             501‐05:  Interior  Trim  and  Ornamentation  
                 Description  and  Operation  
                     Interior Trim  
                 Removal and  Installation  
                     A‐Pillar  Trim Panel  (76.13.31)  
                     B‐Pillar  Trim Panel  (76.13.28)  
                     Cowl Side  Trim  Panel  (76.13.30)  
                     C‐Pillar  Trim  Panel  (76.13.73)  
                     Door Window  Control Switch  Finish Pane
l (76.47.33)  
                     Engine Cover  (76.11.35)  
                     Floor Covering  (76.49.08)  
                     Folding Tray  (76.47.31)  
                     Folding Tray  Finish  Panel  (76.47.32)  
                     Front Door  Armrest  (76.34.22)  
                     Front Door  Trim Panel  Finish Panel  (76.47.11)  
                     Front Door  Stowage  Compartment  (76.34.27) 
                     Front Door  Trim Panel  (76.34.01)  
                     Headliner (76.64.01)  
                     Luggage Compartment  Front Trim Panel  (76.19.31)  
                     Luggage Compart
ment Lid Trim  Panel  (76.19.05)  
                     Luggage Compartment  Rear Trim  Panel  (76.19.44)  
                     Luggage Compartment  Side Trim  Panel  (76.19.22)  
                     Overhead Console  Finish  Panel  (76.47.41)  

Torque Specifications
Torque sp
ecifications are shown in maintenance procedure illustra
tions and also in the torque specifications chart located at
the front of the relevant section.
Disconnecting/Connecting the Battery
Ow ing t
o the electronic components used on the vehicle, it is important that the battery is disconnected when specified in a
maintenance procedure.
When the battery is connected, the specified procedure must be followed, to ensure the correct operation of all vehicle
systems; refer to Section 414-01.
Use of Control Modules
Control modu les may
only be used on the ve
hicle to which they were originally fitted. Do not attempt to use or test a control
module on any other vehicle.
Function
al Test
On
completion of a maintenance procedure, a thorough test should be carried out, to ensu
re that the relevant vehicle
systems are working correctly.
Protecting the Vehicle
Al ways
fit covers to protect
the fenders before commencing work in the engi ne compartment. Cover the seats and carpets,
wear clean overalls and wash hands or wear gloves before working inside the vehicle. Avoid spilling hydraulic fluid,
antifreeze or battery acid on the paintwork. In the event of spillage, wash off with water imme diately. Use polythene sheets
in the trunk to protect carpets. Always use the recommended service tool, or a satisfactory equivalent, where specified.
Protect temporarily exposed screw thread s by replacing nuts or fitting caps.
Preparation
Before disassembly, clean the surrounding ar ea
as thoroughly as possible. When co
mponents have been removed, blank off
any exposed openings using grease-proof paper and masking tape. Immediately seal fuel, oil and hydraulic lines when
separated, using plastic caps or plugs, to prevent loss of fluid and the entry of dirt. Close the open ends of oilways, exposed
by component removal, with tapered hardw ood plugs or readily visible plastic plugs. Immediately a component is removed,
place it in a suitable container; use a se parate container for each component and its associated pa rts. Before dismantling a
component, clean it thoroughly with a recommended cleaning agent; check that the agent will not damage any of the
materials within the component. Clean the bench and obtain ma rking materials, labels, containers and locking wire before
dismantling a component.
Dismantling
O b
serve scrupulous cleanliness when dismantling components,
particularly when parts of the brake, fuel or hydraulic
systems are being worked on. A particle of dirt or a fragment of cloth could caus e a dangerous malfunction if trapped in
these systems. Clean all tapped holes, crev ices, oilways and fluid passages with compressed air. Do not permit compressed
air to enter an open wound. Always use ey e protection when using compressed air.
Ensure that any O-rings used for sealing are correctly refitted or renewed if disturbed. Mark mating parts to ensure that
they are replaced as dismantled. Whenever possible use markin g materials which avoid the possibilities of causing distortion
or the initiation of cracks, which could occur if a center pu nch or scriber were used. Wire together mating parts where
necessary to prevent accidental interchange (e.g roller bearing components). Tie labels on to all parts to be renewed and to
parts requiring further inspection before being passed fo r reassembly. Place labelled parts and other parts for rebuild in
separate containers. Do not disc ard a part which is due for renewal until it ha s been compared with the new part, to ensure
that the correct part has been obtained.

Before inspecting a component for wear or per
forming a dimensional check,
ensure that it is absolutely clean; a slight smear
of grease can conceal an incipient failure. When a component is to be checked dimensionally against figures quoted for it,
use the correct equipment (surface plates, micrometers, dial gauges etc.) in serviceable condition. The use of makeshift
equipment can be dangerous. Reject a component if its dimensio ns are outside the limits quoted, or if damage is apparent.
A part may be refitted if its critical di mension is exactly to the limit size and it is otherwise satisfactory. Use Plastigauge 12
Type PG-1 for checking bearing surface clearance, e.g. big end bearing shell to crank jour nal. Instructions for the use of
Plastigauge and a scale giving bearing clearances in steps of 0.0025 mm (0.0001 in) are supplied with the package.
Safety
Precautions
• WAR
NINGS:
WORKING ON THE FUEL SYSTEM RESULTS IN FUEL AND FUEL VAPOUR BEING PRESENT IN THE ATMOSPHERE. FUEL
VAPOUR IS EXTREMELY FLAMMABLE, HENCE GREAT CARE MUST BE TAKEN WHILST WORKING ON THE FUEL SYSTEM.
ADHERE STRICTLY TO THE FOLLOWING PRECAUTIONS:
DO
NOT SMOKE IN THE WORK AREA.
DISP

LAY 'NO SMOKING' SIGNS AROUND THE AREA.
DISCONNECT TH

E BATTERY BEFORE WORKING ON THE FUEL SYSTEM.
DO NOT CONNEC

T/DISCONNECT ELECTRICAL CIRCUITS
, USE ELECTRICAL EQUIPMENT OR OTHER TOOLS OR
ENGAGE IN WORKING PRACTICES WHICH IN ANY WAY MAY RESULT IN THE PRODUCTION OF SPARKS.
ENS
URE THAT A CO2 FIRE EXTINGUISHER IS CLOSE AT HAND.
ENS

URE THAT DRY SAND IS AVAILABLE TO SOAK UP ANY FUEL SPILLAGE.
EMP

TY FUEL USING SUITABLE FIRE PROOF EQUIPMENT IN
TO AN AUTHORIZED EXPLOSION PROOF CONTAINER.
DO NOT EMP
TY FUEL WHILE WORKING IN A WORKSHOP OR A PIT.
ENS

URE THAT WORKING AREA IS WELL VENTILATED.
ENS

URE THAT ANY WORK ON THE FUEL SYSTEM IS ON
LY CARRIED OUT BY EXPERIENCED AND WELL QUALIFIED
MAINTENANCE PERSONNEL.
ENS
URE THAT FUME EXTRACTION EQUIPMENT IS USED WHERE APPROPRIATE.
FUME EXTRACTION EQUIPMENT MUST BE IN OPERATION WHEN SOLVENTS ARE USED E.G. TRICHLOROETHANE,
WHITE SPIRIT, SBP3, METHYLENE CHLORIDE, PERCHLORETHY LENE. DO NOT SMOKE IN THE VICINITY OF VOLATILE
DEGREASING AGENTS.
General workshop practices:
Disc
onnect the grounded termin
al of the vehicle battery.
D
o not apply heat in an attempt to free seized nuts or fitt
ings; as well as causing damage to protective coatings,
there is a risk of damage from stray heat to electronic equipment and brake lines.
Keep oils and solven
ts away from naked flames and other sour
ces of ignition.
Adhere str
ictly to handling and safety inst
ructions given on containers and labels.
E
nsure that a suitab
le form of fire extinguisher is conveniently located.
Wh
en using electrical tools and equipment, inspect the power
lead for damage and check that it is properly earthed.
D
o not leave tools, equipment, spilt oil etc. around the work area.
Working beneath a vehicle:
Wh
enever possible, use a ramp or
pit in preference to jacking.
Posit
ion chocks at the wheels as we
ll as applying the parking brake.
N
ever rely on a jack alone to support a
vehicle; use axle stands, or blocks care fully placed at the jacking points, to
provide a rigid location.
Ch
eck that any lifting equipment used has adeq
uate capacity and is fully serviceable.
Working on air conditioning systems:
D
o not disconnect any pipes of the refrigeration system
unless you are trained and instructed to do so; a refrigerant
is used which can cause blindness if allowed to come into contact with the eyes.
Health Protection

P

rolonged and repeated contact with mineral oil will result in the removal of natural oils from the skin, leading to dryness,


In
spection

General Information - Terminology Glossary

Description an
d Operation

This glossary of terms is intended to cover emissions-related (to SAE J 1930) term inology, and other abbreviations that may
be used in this manual.
The required term may be looked-up in th e left-hand column, and subsequent columns give the standard acronym, unit or
abbreviation, and definition.
Te rm
(s)
Acr
ony
m /
Unit /
Abbreviation
De fi
nition
A
Accel
e
rator Pedal
AP
Af
ter Botto
m Dead
Center
ABDCEvent occurri ng after
BDC
Af
ter Top Dead CenterATDCEvent occurri ng after
TDC
Ai
rbag /
Supplementary
Restraint System
Airbag, SRSAi rbag restraint system for
dr
iver and front seat passenger
Air Cleane rACL
Air ConditioningA/C
Air Conditioning Con t
rol
Module
A/CCMModule c
ontrolling air conditioning, heating and ventilation
Air Conditioning SignalACSA
i
r conditioning compressor clutch operation is signalled to the ECM which
induces idle speed corrections to co mpensate for engine load changes
Alternating cu
rrent
ac
Ai
r Fuel R
atio
AFRN
omi
nally 14.7 parts air to one part fuel
Ampe
reASI unit of current
Ampere hourAhA current of one ampere
fl
owing for one hour
Anti-Lock Braking SystemABSS
y
stem which prevents wheel lock-up
under braking by sensing lack of
rotation of a wheel(s) and divertin g fluid pressure away from it (them)
ABS Control Mo
dule
ABS CM
ABS /
T
raction Control
Control Module
ABS / T
C CM
Atmosph
e
re
atmU
n
it of pressure (1.01325 bar)
Au
to
matic Stability
Control
ASCA form of vehicle
control
in which the ECM reduces en gine torque to control
wheel-spin
B
Baro me
tric Absolute
Pressure Sensor
BAR OSensor measuring the pressure of surr ou
nding air at any given temperature
and altitude
Bat t
ery positive voltage
B+The posi
ti
ve voltage from a battery or
any circuit connected directly to it
Before Bottom Dead
CenterBBDCEvent occurri ng before BD
C
Before Top Dead

Center
BTD
CEvent (usual ly
ignition) occurring before TDC
Blowe
rBLRDe
vice which supplies a current of air at
moderate pressure, e.g. heater or
A/C blower
Body Processor M
odule
BPMControl modu
le
for body electrical systems, e.g. interior lamps, windshield
wash / wipe control
Bott om D
ead Center
BD
CLowest poin t of piston
travel in a reciprocating engine
Brake hors
epowe
r
bhpEffecti
ve horsepower devel
oped by an
engine or motor, as measured by a
brake applied to its output shaft
Brake Mean Effective
Pres sureBME PThat p
art of the effective
pressure developed in a cyli nder that would result in
a cylinder output equal to the bhp of the engine
Brake On/ O
ff
BOOIn
dic
ates the position of the brake pedal
Br
it
ish Standard
BSStan
dar
d specification issued by the British Standards Institution
Br
it
ish Standard
Automotive
BSAu
BusTopology of a commu n
ication network
Bypass
AirBPAMechanica l
control of throttle bypass air
C
Camshaft Posit
i
on Sensor
CMPSIndi
cat
es camshaft position
Canadian Motor
V
ehicle
CMVSS

Safety Standard
Canister PurgeCANPControls pu
rging of the EVAP canister
Carbon dioxideCO2Colorless gas with

a density of a
pproximately 1.5 ti mes that of air
Carbon mon
oxide
COPoi
sonous gas produced as the re
sult of incomplete combustion
Case G
round
CSE GNDControl modu
le casing ground
Catal

ytic converter
In
-line exhaust system device used to reduce the level of engine exhaust
emissions
Ce
lsius
CSI ter
m for the Centigrade scale, with
freezing point at zero and boiling point
at 100°
Central
Processor Unit
CPUTh
e section of a computer that contai
ns the arithmetic, logic and control
circuits. It performs arithm etic operations, controls instruction processing, and
provides timing signals and other housekeeping operations
Cl
osed Loop
CL
Cl

osed Loop System
CLSControl
system with one
or more feedback loops
Col
umn/Mirror Control
Module
C/MC
M
Control ModuleCMA

self-contained group of electrical/electronic components, designed as a
single replaceable un it, and controlling one or more processes
Controll
er Area Network
CANA
communication system which allows control modules to be linked together
in a network.
Crankshaft Posi
tion
Sensor
CKPSGenerates crankshaft positi on informa
tion in conjunct
ion with the CKPTR (also
generates speed information in certain applications)
Crankshaft Posi
tion
Timing Ring
CKPT
R
Toothe
d ring which
triggers the CKPS
Crankcase Ventila
tion
System
CVSys
tem which scavenges camshaft cover and crankcase emissions and feeds
them into the inlet manifold
Cubic ce nt
imeter
cm
3
Curb weightWe

ight of vehicle with fuel, lubrican
ts and coolant, but excluding driver,
passengers or payload
D
Dat
a Link Connector
DLCConne
ctor providing access and/or control of the vehicle information,
operating conditions, and diagnostic information
De
gree
deg, °Angle or tempe
rature
D

epartment of
Transportation (US)
DO
T
D

epartment of Transport
(UK)
DTp
De
utsche In
stitut für
Normung
DINGerman stand
ards regulation body
Di

agnostic Module
DMSuppl
emental Restraint System (non-c
ontrolling) module for diagnostics
overview
Di
agnostic Test Mode
DTMA le
vel of capability in an OBD system.
May include different functional states
to observe signals, a base level to re ad DTCs, a monitor level which includes
information on signal levels, bi-directional control with on /off board aids, and
the ability to interface with remote diagnosis
Diagnostic Trouble CodeDTCAn al
pha/numeric identifier for a fault
condition identified by the On-Board
Diagnostic (OBD) system
D
ial test indicator
DTIA mechan
ical measuring
instrument, with a rotary indicating pointer
connected to a linear operating probe
D
ifferential pressure
Pressure di
fference betwee
n two regions e.g. between intake manifold and
atmospheric pressures
D
ifferential Pressure
Feedback EGR
DP
FE
An
EGR system that monito
rs differential EGR pressure across a remote orifice
to control EGR flow
D
irect current
dcCurrent which f
lows in on
e direction only, though it may have appreciable
pulsations in its magnitude
Du
al linear switch
DLSJ
-gate switch connected to the TCM on SC vehicles
E
EGR

Temperature EGRT
Sensor
EGRTSens
ing EGR function based on temperature change
EGR Vacu

um Regulator
EVRControls EGR
flow by changi
ng vacuum to the EGR valve
EGR Valve
Position
EVPAn EGR
system that direct
ly monitors EGR valve position to control EGR flow
Electrically E
rasable
Programmable Read-Only
Memory
EEP
ROM