VOLVO 850 SERVICE REMINDER LIGHT RESETTING
Switch on the ignition
Insert the test lead of the diagnostic module into socket 7 of module A
Press the test button on the diagnostic unit four times briefly but firmly
If the LED illuminates and stays illuminated, the system is ready for code input
Now You have to enter the code for resetting the servise interval counter, which is 1-5-1
To do this :
Press the test button once and release it; wait for the LED to illuminate again, then
Press the test button five times
When the LED illuminates again, press the test button once
When the LED flashes several times in succession, the code has been successfully entered
The service interval counter should have been reset