Discovery II (LT) V8-4.6L (2003)
Cruise Control Servo Cable: Recalls
Campaign - Cruise Control Surge Correction
No:
H108
Ref:
19/01/02/NAS
*Issue:
2
Date:
02/07/03*
SERVICE ACTION
Cruise Control Surge Correction
AFFECTED VEHICLE RANGE:
Discovery Series II (LT)
3A767790 to 3A780592 (Option 1)
*
3A780593 to 3A805756 (Option 2)*
Updated information is shown by asterisks.
NOTE:
This Service action applies to vehicles in Retailer inventory. Some vehicles may have been inspected at port of entry. The port-adjusted
vehicles should have a label installed and will have the campaign closed on the AS400.
Customer vehicles should be repaired upon owner complaint following the procedures and Warranty information contained in TIB
19/01/02/NAS.
SITUATION:
CRUISE CONTROL SURGE
Early 2003 Model Year production of 4.6 liter equipped Discovery Series II vehicles have a cruise control software configuration which can result in
objectionable "surge" of up to 2-3 mph around the "target" speed. Additionally, an incorrectly adjusted cruise control cable or minor vacuum leaks can
contribute to the sensation of "surge" even if target speed is maintained.
RESOLUTION:
VERIFY CABLE SETTING AND INSTALL NEW CRUISE CONTROL CONFIGURATION
Prior to sale verify that the cruise control cable is set correctly and investigate the current state of the cruise control tune. If necessary, update the cruise
tune following the instructions in this Service Action. Installation of the updated cruise control configuration using TestBook/T4 will likely resolve the
surge situation in combination with a properly set cable. If the problem persists once the new tune is installed investigate and correct any vacuum system
leaks.
PARTS INFORMATION:
Not applicable
WARRANTY CLAIMS:
H108 Option 1
Time 0.40 hrs.
Check cable, evaluate cruise control configuration and update if required
H108 Option 2
Time 0.10 hrs.
Check cable and adjust cable if required
Normal warranty policy and procedures apply. Material allowance is included in labor operation.
REPAIR PROCEDURE
ADJUST THROTTLE CABLE (OPTIONS 1 AND 2)
NOTE:
The Workshop Manual provides a range for cruise throttle adjustment. The middle of that range is the optimum setting and should always be set
for the best possible operation of the Cruise Control system.