HOW TO PERFORM VARIANT CODING


AIM


The "variant coding" means using the M.U.T.-III to write vehicle information such as engine type, transmission type or the brake type into an ECU. The information to be written in the ECU is called as "variant code". The variant code will be sent to other via CAN communication. It is also used to determine control contents of the ECUs.
In some ECUs, temporary or irrelevant variant code may has been written as a default setting. In this case, unless the variant code is corrected according to the vehicle, an inappropriate diagnosis code may be stored, or the ECU cannot function correctly.
If the ECU below is replaced with new one, use the M.U.T.-III to carry out the variant coding as follows.
Component to be replaced
Engine-ECU <M/T>
Engine automated manual transmission electronic control unit (Engine-A-M/T-ECU) <Automated manual transmission>
ABS/Active stability control system-ECU <Vehicles with Active stability control system>
Combination meter
ETACS-ECU

PROCEDURE


1.
caution Before connecting or disconnecting the M.U.T.-III, turn the ignition switch to the "LOCK" (OFF) position.
Connect the M.U.T.-III to the diagnosis connector.
note For details on how to use the M.U.T.-III, refer to the "M.U.T.-III operation manual."
2.Select "Coding" from the menu screen.
3.Select "On Vehicle Coding" from the menu screen.
4.Enter the chassis number. <Except combination meter>
note When ABS-ECU and electric power steering-ECU are replaced with a new one, select "On Vehicle Chassis Number or VIN Writing" from the menu screen, and enter the chassis number.
5.Select the variant coding item and variant coding content as follows, and carry out the variant coding.
System
 Variant coding item
 Variant coding content
 Applicable model
Engine-ECU <Petrol engine-M/T> or engine-A-M/T-ECU <Petrol engine-Automated manual transmission>
 Climate Control
 Not equipped
 Vehicles without semi automatic air conditioner
Equipped
 Vehicles with semi automatic air conditioner
Creeping activated
 Not available
 -
Available
 All models
Brake System Type
 A.S.C.
 Vehicles with Active stability control system
ABS Only
 Vehicles without Active stability control system
Shift Mode after Ignition ON
 Last Mode
 -
Default Manual
 Except vehicles with 135950 engine
Default Automatic
 Vehicles with 135950 engine
Undefined
 -
Engine-ECU <Diesel engine-M/T> or engine-A-M/T-ECU <Diesel engine-Automated manual transmission>
 Vehicle Variant
 Smart for four
 -
Colt (2 door)
 -
Colt (4 door)
 All models
Engine Power Variant
 50kW
 -
70kW
 All models
Transmission Variant
 M/T
 Vehicles with M/T
Automated-M/T
 Vehicles with automated manual transmission
Garage Shift Mode
 Without Brake
 Vehicles with automated manual transmission
With Brake
 -
2nd gear launching
 Not possible
 -
Possible
 All models
ECU Coding
 Not coded
 -
Unit coded
 All models
Steering column gear shift
 not available
 All models
available
 -
Vehicle speed limiter
 not available
 All models
available
 -
Cruise control
 not available
 All models
available
 -
Climate control
 not available
 Vehicles without semi automatic air conditioner
available
 Vehicles with semi automatic air conditioner
Automatic mode default
 last mode
 -
manual
 Vehicles with automated manual transmission
automatic
 -
Automatic mode permitted
 not allowed
 -
allowed
 Vehicles with automated manual transmission
Brake System Type
 ABS only
 Vehicles without Active stability control system
A.S.C.
 Vehicles with Active stability control system
Engine-ECU <Diesel engine-M/T> or engine-A-M/T-ECU <Diesel engine-Automated manual transmission>
 vehicle code
 0
 All models
1
 -
2
 -
3
 -
4
 -
5
 -
6
 -
7
 -
ABS/Active stability control system-ECU <Vehicles with Active stability control system>
 Brake Type
 Undefined
 -
Drum Brake
 Vehicles with rear drum brakes
Disc Brake
 Vehicles with rear disc brakes
Steering Gear Type
 Normal Type
 Except vehicles with turbocharger
Quick Type
 Vehicles with turbocharger
Initial Value
 2005 model year
Combination meter
 Transmission Type
 M/T
 Vehicles with M/T
Automated-M/T
 Vehicles with automated manual transmission
Brake System Type
 ABS only
 Vehicles without Active stability control system
A.S.C.
 Vehicles with Active stability control system
ETACS-ECU
 Daytime running lamp
 Not active
 Vehicles without daytime running lamp
Active
 Vehicles with daytime running lamp
Dead lock
 Not active
 Vehicles without deadlock system
Active
 Vehicles with deadlock system
Rain Light Sensor
 Not equipped
 Vehicles without rain light sensor
Equipped
 Vehicles with rain light sensor
ETACS Plausibility
 Uncoded
 -
M/T
 Vehicles with M/T
Automated-M/T
 Vehicles with automated manual transmission
Undefined
 -
Headlamp type
 H7 lamp
 Four-lamp headlamp
H4 lamp
 Dual-lamp headlamp
6.After the variant coding has completed, use the M.U.T.-III to check the diagnosis codes for all systems. Confirm that no diagnosis codes are set.
note When the variant coding is carried out, the ABS/Active stability control system-ECU will memorize the diagnosis code. After the variant coding has been finished, turn the ignition switch to the "LOCK" (OFF) position and erase the diagnosis code.
7.If any of the diagnosis codes are set, the variant coding may have been completed incorrectly. Erase the diagnosis code(s). Then repeat the variant coding.