Airflow Sensor - Design Modification
Boxster1a/00 2445
Binder 2, "Fuel, Exhaust, and Engine Electronics". This bulletin replaces bulletin Group 2, 1/00, dated 4-18-00
4-06-01
Air Flow Sensor - Additional Information
Vehicle Type:
Boxster 2.7 / Boxster S
Model Year:
MY 2000 (Y)
Concern:
New airflow sensor ( HMF ) that is less sensitive to dirt particles.
Information:
A new HMF is being introduced as of January 31, 2000. The new HMF, which is less sensitive to dirt particles, is being installed in production starting with the VIN's shown.
A barcode sticker will be attached to the air cleaner housing to make it easier to distinguish whether a new or an old HFM is installed in the engine. When replacing an old sensor, the DME will have to be reprogrammed. This is accomplished by using the PST2 with version 9.0 installed. Version 9.0 has a tentative release date of May 1, 2000. Please note that until software version 9.0 is released, continue to use the old style HMF sensor for repairs.
The barcode sticker reads as shown.
Note:
The numbers printed on the bar sticker are not the actual part numbers of the sensors.
The sensors are visually distinguished in two ways:
1. There are coded pegs by the electrical plug connection (see figure 1). One peg (A) indicates the old style and two pegs (N) indicates the new style.
2. The air sampling port is manufactured differently (see figure 2). A straight bottom (A) indicates the old style and curved bottom (N) indicates the new style.
If a new style HFM is found to be defective, please observe the following instructions:
1. Create an OBDII working log (report).
2. Replace the air cleaner. Place the old air cleaner in the new air cleaner's box.
3. Make a copy the repair order.
4. Send the replaced new style HMF sensor, air cleaner, completed OBDII report, and the copy of the repair order to:
Important!
Warranty Test Center
C/O Technical Service
1777 Phoenix Parkway Suite 202
Atlanta, Ga. 30349
Parts information
Work Procedure:
When replacing an old style HMF sensor on vehicles with a new style HMF sensor, the DME must be reprogrammed. Remember: do not install a new style HMF sensor until you receive the 9.0 software for the PST2.
Programming the DME control unit with PST2 after installing a new style HFM:
1.1 Connect the PST2 and switch on ignition.
1.2 Select vehicle type and start search with the >> key.
1.3 Select DME in the control modules menu and press the >> key.
1.4 Select control unit programming and press the >> key.
1.5 Select program map and press the >> key.
1.6 Input the VIN number, press the >> key and confirm with the F7 key.
1.7 Input the old programming number and press the >> key. This is the number obtained from IPAS. Now confirm the number with the F7 key.
1.8 Select the proper data record corresponding with New HMF. Example: "Boxster S OBD II (LEV, manual transmission), New HMF". Press the >> key to start programming.
Note:
LEV stands for Low Emission Vehicle.
1.9 When programming is complete, a message will be displayed "After control unit programming, the "CAN time-out" fault must be erased on every control unit connected with the CAN". Press the >> key to continue.
1.10 Select the DME and clear fault memory. It the vehicle has a tiptronic, the fault memory also needs to be cleared.
1.11 Return to the start menu and switch off PST2.
Working Time
Literature:
Boxster Technical Manual Group 2:
24 70 - Programming the DME control unit.
24 45 19 - Removing and installing mass airflow sensor.
DISCLAIMER