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REGISTRATION WHEN REPLACING OSS-ECU AND ELECTRIC STEERING LOCK
 
 
caution
  • When KOS-ECU is replaced, all the registrations that need to be performed at KOS-ECU replacement must be completed before the registration of OSS-ECU and electric steering lock.
  • Be sure to check that DTC B1157 OSS EEPROM error and DTC B1155 ESL EEPROM error are not set. If DTC B1157 "OSS EEPROM error" and DTC B1155 "ESL EEPROM error" are set, the chassis number cannot be stored in memory even when it is written. Therefore, when these diagnostic trouble codes are set, be sure to carry out the troubleshooting first to repair the trouble, and then write the chassis number to OSS-ECU or electric steering lock.
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991958 Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicle Communication Interface (V.C.I.)
    • MB991827 M.U.T.-III USB Cable
    • MB991910 M.U.T.-III Main Harness A
When OSS-ECU or electric steering lock is replaced, the VIN needs to be registered to the replaced ECU.
 
 
 
 
VIN REGISTRATION PROCEDURE
noteRegardless of which of OSS-ECU or electric steering lock is replaced, the registration can be performed by executing the same menu selection. (Even when both OSS-ECU and electric steering lock were replaced as a set, they can be registered by performing the registration process only once.)
1. Replace the OSS-ECU or electric steering lock.
2.
caution
To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III) to the data link connector.
noteDisconnect and reconnect the negative battery terminal, and then proceed to the following operations within approximately 30 seconds.
3. From the system selection screen of scan tool (M.U.T.-III), select "OSS".
4. From the OSS function menu screen, select "Coding".
5.
From the coding menu screen, select "Chassis No./VIN Writing."
6.
Following the instruction on the screen, press the OK button to execute the VIN writing. (M.U.T.-III screen above indicates when OSS-ECU is replaced.)
7.
On the writing result confirmation screen, check that the VIN is written, and finish the registration.
8. Operate the engine switch to turn OFF the power supply.
noteAfter the scan tool (M.U.T.-III) has executed the VIN writing, it will turn the engine switch on forcibly. Therefore, after completion, turn the engine switch off.
9. Set the driver's door from open to close or from close to open.
10. Carrying the keyless operation key, perform the engine switch operation to turn the power from OFF to ON twice.
11. Check that the OSS-ECU DTC (B1160 or U1166) is not set, and finish the registration.