Service Action 317 - DME Reprogramming: Thermostat Monitoring Diagnostics (12 52 01)

SERVICE ACTION 317 - DME REPROGRAMMING: THERMOSTAT MONITORING DIAGNOSTICS

CAMPAIGN SERVICE BULLETIN

SUBJECT

E53 X5 3.0 DME Reprogramming: Thermostat Monitoring Diagnostics

SITUATION

The thermostat monitoring calibration, in the DME, may allow FC168, "thermostat mechanically stuck open" to store, if the heater blower is set to "high" (maximum heat or defrost demand) during the engine warm up phase. Although FC168 is set, the thermostat may not have a mechanical failure.

The "check engine" lamp may illuminate if FC168 is stored. Driveability of the vehicle is unaffected.

CAUSE

DME calibration

CORRECTION

Reprogram the DME with CD27.1 or higher.

AFFECTED VEHICLES

This Service Action involves E53 X5 3.0 vehicles with the M54B30 engines, which were produced from 4/2000 to 7/2001.

In order to determine if a specific vehicle is affected by this service action, it will be necessary to utilize the "Service Menu" of the DCS (Dealer Communication System). Based on the response of the system, either proceed with the corrective action or take no further action.

The Chassis Number Ranges listed below are only for informational purposes and are not to be considered as the only deciding factor.

Model	Chassis Number Range
X5 3.0i	LH78033 - LH79487
X5 3.0iA	LH78025 - LH78032
X5 3.0iA	LM61025 - LM90999
X5 3.0iA	LP20000 - LP21398

PROCEDURE

1. Check the DME fault memory ( even if the "check engine" lamp is not illuminated) to determine if FC168 is stored.
2. If FC168 is not stored, reprogram the DME with CD27.1 or higher to complete this repair.
3. If FC168 is stored in the DME, printout the fault environmental conditions.
4. Compare the following values from the FC 168 environmental conditions (arrows Fig 1 ):

"at coolant temp" Range	"at coolant temp outlet" Range	Repair
80°C. - 90°C.	20°C - 55°C	Reprogram the DME with CD 27.1 or higher
Less than 80°C.	Within approx. 20°C. less than "at coolant temp" value	Replace the engine thermostat and reprogram the DME with CD 27.1 or higher.

SERVICE ACTION LABEL INSTRUCTIONS

This Service Action has been assigned code number 317. After the vehicle has been checked, and corrected if necessary, obtain a label (SD 92-170) and:

1. emboss your BMW dealer warranty number in the middle of the label (1);
2. punch out code number 317 printed on the label and,
3. affix the label to the B pillar as shown in Fig 2 .

If the vehicle already has a label from a previous Service Action/Recall Campaign, affix the new label next to the old one. Do not affix one label on top of another one because a number from an underlying label could appear in the punched-out hole of the new label.

WARRANTY INFORMATION

Covered under the terms of the BMW New Vehicle Limited Warranty without regard to vehicle age or mileage. Reimbursement for this Service Action will be through campaign entry.

IMPORTANT:  Submit a separate warranty claim for thermostat replacement.