| Subject: | Cruise Control Operation -- Increasing Set Speed |
| Models: | 2004-2005 Passenger Cars and Light Duty Trucks |
This bulletin is being issued to provide dealers with additional information
on the increasing set speed function during cruise control operation. The vehicle's
Owner's Manual states that the accelerator pedal may be used to increase speed and
then establish a new set speed by engaging the set button again. This is true, but
the increased speed must be greater than the minimum speed calibrated in the PCM.
Minimum speed calibrations vary for each model, depending on which module manufacturer
the vehicle is equipped with.
If a customer comes in with a comment that the set button is intermittently
inoperative when using it to establish a new set speed, this may be due to the speed
increase not being enough. To verify system operation, compare the increased set speed
function to another like vehicle. If the operation is similar, then no further work
should be performed. If the vehicle does have a condition, then follow diagnostics
in Service Information for cruise control set speed operation. The tap up feature
for cruise control still will increase vehicle set speed.
