Test Function No. 19 - Lock/Unlock

• The unlock code is known as a checksum of the VIN. The VIN can be obtained from Test Function No. 1. The last five numbers of the VIN are added together and the resulting figure equals the checksum. For example, if the VIN is XA137295 the checksum will equal 26, which in turn equals the unlock code. Enter the unlock as follows:
  • When test function No. 19 is entered, 'LOCK : ON' is displayed
  • Press the trip reset button once, 'LOCK : 00' is displayed
  • Press the trip reset button until the unlock checksum is reached, i.e. 26
  • Press the check control button once, all test functions will be unlocked.

Relock the test functions as follows:

• Go to test function No. 19 and press the trip reset button, 'LOCK : OFF' is displayed
• Press the trip reset button a second time, 'LOCK : ON' is displayed
• Press the check control button or switch the ignition off to relock the test functions.