Isuzu 4ja1, Workshop Manual

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6E-258 Engine Control System (4JH1)
1. Connect the scan tool to the vehicle DLC, with the
engine and the scan tool OFF.
2. Turn ON the scan tool.
3.
Select Diagnostic > appropriate vehicle
identification > Powertrain > 4JH1-TC >
Programming > Program VIN.
4. Input correct VIN reading from stamped VIN or
affixed VIN plate on the vehicle.
Select Lock ECU and lock the programmed VIN.
Service Programming System (SPS)
Description
The service programming system (SPS) allows a
technician to program a control module through the data
link connector (DLC). The information transfer circuit that
is used at the DLC is the same serial data circuit used be
the scan tool for retrieving diagnostic trouble codes
(DTCs), displaying data, clearing DTCs etc. This
procedure offers the ability to install software/calibrations
matched to a particular vehicle.
Most control modules have two types of memory. The
software/calibrations reside in the flash memory. The two
types of memory are listed below:
•
Electrically Erasable Programmable Read Only
Memory (EEPROM).
This type of memory allows selected portions of
memory to be programmed while other portions
remain unchanged.
Certain learned values reside in the EEPROM, such
as:
- The vehicle identification number (VIN)
- The software/calibrations identification numbers
- The control module security information
•
Flash Read Only Memory-Flash Memory
Flash memory has increased memory storage
capacity. During programming, all information within
this type of memory is erased, and then replaced
with entirely new information.
Service Programming Methods
The two methods of programming an engine control
module (ECM) are listed below:
•
Remote Programming
•
Pass Thru Programming
For information on programming an ECM using one of
the methods listed above, refer to Service Programming
System (SPS) (Remote Procedure) or Service
Programming System (SPS) (Pass-Thru Procedure).
Before Programming a Control Module
Important:
DO NOT program an existing ECM with the identical
software/calibration package. This procedure is not a
short cut to correct the driveability condition. This is an
ineffective repair. An ECM should only be programmed
when the following occurs:
•
When a service procedure instructs you to replace
the ECM. When the ECM from another vehicle is
installed, VIN must be changed. And change
vehicle information as necessary such as type of
transmission.
•
An updated software/calibrations is released.
Ensure that the following conditions are met before
programming an ECM:
•
The scan tool PCMCIA card is programmed with
the latest software.
•
The TIS 2000 is installed with the latest software.
•
The hardware key is plugged into the computer
port.
•
Vehicle system voltage:
- There are no charging system concerns. All
charging system concerns must be repaired
before programming the ECM.
- The battery voltage is greater than 12 volts but
less than 16 volts. The battery must be fully
charged before programming the ECM.
- A battery charger is NOT connected to the
vehicles battery. Incorrect system voltage or
voltage fluctuations from a battery charger may
cause programming failure or ECM damage.
- Turn OFF or disable any system that may put a
load on the vehicles battery. Turn OFF or
disable systems such as:
◊
Heating, ventilation, and air conditioning
(HVAC) systems
◊
Headlights
◊
Room lights
◊
Accessory equipment
•
The ignition switch is in the proper position. The
scan tool prompts you to turn ON the ignition, with
the engine OFF. DO NOT change the position of
the ignition switch during the programming
procedure unless instructed to do so.
•
All tool connections are secure:
- The RS-232 cable
- The connection at the DLC
- The voltage supply circuits