Heater - Poor Performance/Slow Engine Warm Up: Overview

NO: 24-14-98

GROUP: Cooling

DATE: Oct. 30, 1998

SUBJECT:
Poor Heater Performance
At Idle Or Slow
Engine Warm Up

MODELS:

1998 (LH) Concorde/Intrepid

NOTE:
THE REPROGRAMMING PROCEDURE FOR THE PCM APPLIES TO VEHICLES BUILT PRIOR TO MAY 12, 1998 (MDH 0512XX).

SYMPTOM/CONDITION:

Some owners may describe poor heater performance during stop and go (city) driving or slow engine warm up in cool weather. Heater performance during highway driving will be described as adequate. Low coolant level or excess air in the cooling system can cause these performance problems.

DIAGNOSIS:





Inspect the heater hoses as shown in figure 1. If the hose looks like pictures "A" or "B" on the illustration, perform the Repair Procedure. If a tee exists in the horizontal section of the hose and is separate from the quick connect or TSB 18-09-98 Rev. B was performed, further diagnosis and testing will be required.





PARTS REQUIRED:

NOTE:
THE MDS AND DRB III(R) ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1170 OR HIGHER MUST BE INSTALLED.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 24-46-10-96 Heater Hose, Modify 0.5 Hrs.

08-19-40-97 Reprogram PCM 0.5 Hrs.

FAILURE CODE: XX - Service Adjustment
FM - Flash Module