1 Use TestBook/T4 to clear any adaptions currently set. 2 With the engine warm (>86 C, select 2nd gear high range. 3 Accelerate the vehicle until the engine speed reaches the limiter. 4 Release the throttle and allow the vehicle to decelerate until the engine idle speed is reached. 5 Check that one of the speed range adaptions has been set (read this from TestBook/T4). 6 Repeat the above procedure until all four adaptions are set When all four adaptions have been set, check that the ECM has not recorded any misfire detection faults. If it has, then clear the memory of the misfire fault codes. It may not be possible to reset adaption number 4 if the ECM has already been programmed with a value. Due to the nature of the procedure and the self learn capacity of the ECM, if adaption number 4 does not reset, it is permissible to leave this adaption and let the ECM learn it during normal vehicle usage.