Actron Super AutoScanner CP9145, User Manual

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• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Getting Started
1
OBD II stands for On-Board Diagnostics version II. OBD II is a system that the
Society of Automotive Engineers (SAE) developed to standardize automotive
electronic diagnosis. Technicians now can use the same tool to test any OBD II
compliant vehicles without special adapters. The established SAE guidelines are:
• a universal diagnostic test connector, called the data link connector (DLC),
with dedicated pin assignments.
• a standardized location for the DLC, visible under the dash on the driver’s
side.
• a standardized list of diagnostic trouble codes (DTCs) used by all
manufacturers.
• a standardized list of parameter identification (PID) data used by all
manufacturers.
• the ability of the vehicle system to record a freeze frame of the operating
conditions when a fault occurs.
• expanded diagnostic capabilities that records a code whenever a condition
occurs that effects vehicle emissions.
• the ability to clear stored codes from vehicle memory with the scan tool.
In addition, SAE has published hundreds of pages of text defining a standard
communications protocol that establishes the hardware, software, and circuit
parameters of OBD II systems. Unfortunately, vehicle manufacturers have
different interpretations of this standard communications protocol. As a result, the
generic OBD II communications scheme used will vary, depending on the vehicle.
Ford On-Board Diagnostics
System Long Name Years Description
MCU Microprocessor Control Unit 1980 –1991
Used in police vehicles, containing carbureted
engines. Uses the MCU DLC.
EEC-IV
Electronic Engine Control,
Fourth generation
1984 –1995
Most Ford vehicles equipped with North American
engines. Uses the EEC-IV DLC.
MECS
Mazda Electronic Control
System
1988 –1995
Vehicles equipped with Mazda-sourced engines.
Uses MECS 6-pin and 17-pin DLCs.
EEC-V
Electronic Engine Control,
Fifth generation
1994* – present
Complies with OBD II regulations and uses the
OBD II J1962 DLC.
PTEC
Powertrain Electronic Con-
troller
2000 – present
Complies with OBD II regulations and uses the
OBD II J1962 DLC.
* EEC-V OBD II system used in 1994-1995 vehicles equipped with a 3.8L or 4.6L engine.
Chrysler On-Board Diagnostics
System Long Name Years Description
SMEC
Single Module
Engine Controller
1989–1990
Used a 6-pin Serial Communication Interface (SCI) DLC
and has bidirectional capability.
SBEC
Single Board Engine
Controller
1989*–1995
Used two types of DLCs: a 6-pin SCI and a 6-pin LH series.
The first to allow a tool to reset the EMR light on trucks.
OBD II
PCM
OBD II Powertrain
Control Module
1995**– present
Complies with OBD II regulations and uses the OBD II
J1962 DLC.
JTEC
Jeep/Truck Engine
Controller
1996– present
Complies with OBD II regulations and uses the OBD II
J1962 DLC.
The JTEC system is used on light-duty trucks and Jeeps
* In 1989, the SBEC system was installed in selected vehicles with 3.0L V6 engines.
** Some vehicles in 1995 were equipped with the OBD II PCM.