Jeep Wrangler TJ. Manual — part 73
body, or when repairing any component between the
shift lever and the Transmission.
Some questions to ask yourself when performing
the road test are as follows:
•
Is the complaint or concern what you think the
problem is, based on the drivers description of the
problem?
•
Is the Transmission operating normally, or is
there a real problem?
•
When does the problem occur?
•
Is the problem only in one gear range?
•
What temperature does the problem occur?
•
Does the vehicle have to sit over night for the
problem to occur?
•
Does the transmission go into Limp-in mode?
4.3.4
ELECTRONIC PINION FACTOR
WARNINGS (IF APPLICABLE)
The pinion factor must be set when replacing the
PCM. Note: The pinion factor is a fixed number and
cannot be changed or updated in some vehicle
applications. If the pinion factor is not set or incor-
rectly set, any speed related functions will not
operate correctly i.e. speedometer, speed control,
rolling door locks, other control modules will be
affected that depend on speed information.
4.3.5
SERVICE BULLETINS AND RECALLS
Always perform all Safety Recalls and Service
Bulletins that are applicable to the problem. Under
the provisions of the warranty.
5.0
REQUIRED TOOLS AND
EQUIPMENT
DRBIII
t (diagnostic read-out box) scan tool -
must use the latest release level.
Diagnostic Pinout Box #8815
Evaporative Emissions Leak Detector #8404
Terminal Removal tool #3638
Fuel filler adapter #8382
Fuel pressure adapter (C-6631) or #6539
Fuel pressure kit (C-4799-B) or #5069
Fuel pressure kit #8978
Fuel release hose (C-4799-1)
Jumper wires
Ohmmeter
Oscilloscope
Pressure gauge 0-2068 kPa (0-300 PSI)
Transmission simulator #8833
Electronic Transmission Adapter Kit (Miller #
8333-1A)
Vacuum gauge
Voltmeter
12 volt test light minimum 25 ohms resistance
with probe #6801
CAUTION: A 12 volt test light should not be
used for the following circuits, damage to the
powertrain controller will occur.
•
5-volt Supply
•
J1850 PCI Bus
•
CCD Bus
•
PCI Bus
•
CKP Sensor Signal
•
CMP Sensor Signal
•
Vehicle Speed Sensor Signal
•
O2 Sensor Signal
6.0
ACRONYMS
A/C
Air Conditioning
ABS
Anti-lock Brake System
ASD Re-
lay
Auto Shutdown Relay
APPS
Accelerator Pedal Position Sensor
Baro
Barometric Pressure
BCM
Body Control Module
BTS
Battery Temperature Sensor
CAA
Clean Air Act
CAB
Controller Antilock Brakes
CARB
California Air Resources Board
CCD
BUS
Chrysler Collision Detection Bus
CKP
Sensor
Crankshaft Position Sensor
CKT
Circuit
CMP
Sensor
Camshaft Position Sensor
CM840
Cummins Engine controller
CO
Carbon Monoxide
CVI
Clutch Volume Index
DCP So-
lenoid
Duty-Cycle Purge Solenoid
DLC
Data Link Connector
DRBIII
t
Diagnostic Readout Box - 3rd Gen-
eration
17
GENERAL INFORMATION
DTC
Diagnostic Trouble Code
DVOM
Digital Volt Ohm Meter
EATX
Electronic Automatic Transmission
Controller
EC
European Community
ECT
Sensor
Engine Coolant Temperature Sensor
EE-
PROM
Electrically Erasable Programmable
Read Only Memory
EGR
Valve
Exhaust Gas Recirculation Valve
EMCC
Electronically Modulated Converter
Clutch
EMI
Electro-Magnetic Interference
EOBD
European OBD (based upon Euro
Stage III)
EPA
Environmental Protection Agency
EPP
Engine Position Pulse
ETC
Electronic Throttle Control
EU
European Union
EVAP
Evaporative Emission System
EVR
Electronic Voltage Regulator
EWMA
Exponentially Weighted Moving Av-
erage
FEMCC
Fully Electronically Modulated Con-
verter Clutch
FTP
Federal Test Procedure
FSS
Fan Speed signal
HC
Hydrocarbons
HO2S
Heated Oxygen Sensor
Genera-
tor
Previously called
9alternator9
IAC Mo-
tor
Idle Air Control Motor
IAT Sen-
sor
Intake Air Temperature Sensor
IOD
Ignition off draw
IRT
Intelligent Recovery Timer
ISS
Input Speed Sensor
I/M
Inspection and Maintenance Testing
JTEC
Jeep/Truck Engine Controller
LDP
Leak Detection Pump
LED
Light Emitting Diode
LPS
Line Pressure Sensor
LR
Low/reverse Clutch
LSIACV
Linear Solenoid Idle Air Control
Valve
MAF
Mass Air flow
MAP
Sensor
Manifold Absolute Pressure Sensor
MDS
2
t
Mopar Diagnostic System 2nd Gen-
eration
MIL
Malfunction Indicator Lamp
MS
Multi Select
MTV
Manifold Tuning Valve
NGC
Next Generation Controller
NTC
Negative Temperature Coefficient
NVLD
Natural Vacuum Leak Detection
O
2
Sen-
sor
Oxygen Sensor
O2S
Oxygen Sensor
OBD I
On Board Diagnostics 1st Genera-
tion
OBD II
On-Board Diagnostics 2nd Genera-
tion
OD
Overdrive Clutch
ORVR
On-Board Refueling Vapor Recovery
OSS
Output Speed Sensor
PCI BUS
Programmable Communications In-
terface BUS (J1850)
PCM
Powertrain Control Module
PCS
Pressure Control Solenoid
PCV
Positive Crankcase Ventilation
PDC
Power Distribution Center
PEMCC
Partial Electronically Modulated
Converter Clutch
PEP
Peripheral Expansion Port
P/N
Park/Neutral
PPS
Proportional Purge Solenoid
PS
Power Steering
18
GENERAL INFORMATION
PSP
Power Steering Pressure (Switch)
PTC
Positive Temperature Coefficient
PWM
Pulse-Width Modulation
RAM
Random Access Memory
REV
Reverse Clutch
RFI
Radio Frequency Interference
RKE
Remote Keyless Entry
RPM
Revolutions Per Minute
SAE
Society of Automotive Engineers
SBEC
Single Board Engine Controller
SCW
Similar Conditions Window
SKIM
Sentry Key Immobilizer Module
SRV
Short Runner Valve
SSV
Solenoid Switch Valve
SW
Switch
TCC
Torque Converter Clutch
TCCM
Transfer Case Control Module
TDC
Top Dead Center
TP
Throttle Position Sensor
TRD
Torque Reduction
TRS
Transmission Range Sensor
TTS
Transmission Temperature Sensor
UD
Underdrive Clutch
VSS
Vehicle Speed Signal
WOT
Wide Open Throttle
2/4
2nd and 4th gear Clutch or Pres-
sure Switch
2C
2nd Clutch
4C
4th Clutch
6.1
DEFINITIONS
OBDII/EURO III Trip - A vehicle start and drive
cycle such that all once per trip diagnostic monitors
have run.
Key Start - A vehicle start and run cycle of at least
20 seconds.
Warm-up Cycle - A vehicle start and run cycle
such that the engine coolant must rise to at least
71 C (160° F) and must rise by at least 22 C (40° F)
from initial start up. To count as a warm-up cycle,
no DTC’s may occur during the cycle.
19
GENERAL INFORMATION
NOTES
20
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