Campaign - False MIL ON/ECM Update
No: H281Ref:
Issue: 1
Date: 10/11/02
SERVICE ACTION
Improved Thermostat Monitoring
AFFECTED VEHICLE RANGE:
Freelander (LN) 2A333058 - 2A382074
SITUATION:
FUNCTIONING THERMOSTAT MAY BE INCORRECTLY MONITORED
Under certain driving conditions the diagnostic software can misinterpret radiator outlet temperature and top hose temperature comparisons. A fault can be recorded if the temperature differential is greater than what the software anticipates. Two consecutive "trips" with this false fault detection will illuminate a MIL warning light, although no actual fault exists.
RESOLUTION:
INSTALL ENHANCED THERMOSTAT MONITORING TUNE
At PDI or at the next service opportunity the enhanced thermostat monitoring tune contained on TestBook/T4 disc DRGTC06Y or later should be loaded into the ECM to ensure that the possibility of the inappropriate MIL illumination is removed.
PARTS INFORMATION:
LRN0002LABEL Campaign Label Qty 1 (NOTE: Sold in quantity pack of 100)
WARRANTY CLAIMS:
H281 Time 0.40 hrs.
Download new tune for thermostat monitoring system
FAULT CODE: Up
Normal warranty policy and procedures apply.
Material allowance is included in labor operation.
REPAIR PROCEDURE
INSTALL UPDATED ECM TUNE
1. Connect TestBook/T4 to the vehicle and load configuration disc DRGTC06Y or later.
2. Follow the on screen instructions and select:
^ "Diagnostic System".
^ "Vehicle Configuration".
^ "EMS ECU checks".
3. Update the ECM software.
4. Return to the Diagnostic System screen and disconnect TestBook/T4 from the vehicle.
INSTALL CAMPAIGN LABEL
NOTE:
Campaign labels may have multiple Campaign numbers written on them if multiple campaigns are performed at the same time.
1. When all specified repairs have been accomplished, prepare the campaign label (LRN0002LABEL) as follows:
a) Place the label on a hard surface.
b) Use a ballpoint pen to neatly write/scribe in the bare aluminum areas of the label the following information:
^ Service Action code "H281"
^ Your retailer code
^ The date of repair
2. Clean all grease and dirt from the radiator support member.
3. Peel the completed campaign label from the backing paper and position it on the cleaned area.
4. Roll the label with the special roller tool to ensure proper adhesion.