Heating/A/C - Heater Doesn't Blow Hot Enough
87 12 02February 13, 2012
2028678
Vehicle Information
Condition
Update Programming Climate Control Software Update
Technical Background
Tip:
This technical bulletin only supports vehicles with "KH6" P.R. code.
Customer may complain that heater is not blowing hot enough, even with heater control set to MAX heat position, especially after vehicle sits overnight, or for long periods of time. Customer may also state that heat will temporarily return once they manipulate the heater control knob.
Production Solution
Introduction of new software beginning January 23, 2012.
Service
Update Programming Procedure:
Tip:
To Update-Programming using SVM, review and follow instructions in Technical Bulletin Instance 2014603 "Software Version Management".
The SVM Process must be completed in its entirety so the database receives the update confirmation response. A warranty claim may not be reimbursed if there is no confirmation response to support the claim.
Note:
^ Attach VAS device to vehicle and switch the ignition key ON.
^ Enter Vehicle Self Diagnosis.
^ Select 08 - Air conditioner/heater electronics"
^ Select 003 - Identification".
^ Select 003.01 - Identification Master".
^ Select Software version".
^ Check software version
If software version is 0404" or higher, work complete.
If software version is specifically ~~0303 or 0304 enter Guided Fault Finding to update software through (SVM), and input SVM Unit code 36C8 when prompted.
^ Prior to software update, unlock all doors.
The SVM flash procedure can be found in GFF under Functions / Component Selection, Software Version Management, Adapting Software.
Warranty
Required Parts and Tools
No Special Parts required.
Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal. Always check with your Parts Dept. and Repair Manuals for the latest information.