DME Control Unit: Fault Code P1486 (GROUP 2, NO. 5/08)

Publication date: 2008-02-18
Reference number: GROUP 2, NO. 5/08

DME CONTROL UNIT: FAULT CODE P1486

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 2, NO. 5/08, Date of Issue: February 18, 2008

PORSCHE:	2007 Boxster (987)/Boxster S (987); Cayman/Cayman S (987)
GROUP:	2
PART IDENTIFIER:	2048

NOTE: The present document was valid at the time of print. A later version may be available online.

TOOLS

TOOLS INFORMATION

Designation	Type	Number	Description
PIWIS Tester	Special tool	9718

COUNTRY/MARKET

USA (C02)

Canada (C36)

CONCERNS

Check Engine light comes on,
Tank leakage diagnostic module (referred to below as DMTL unit).

INFORMATION

Fault code P1486 in DME control unit fault memory.

Depending on the condition of the vehicle as well as environmental conditions, the Check Engine light can come on and fault code P1486 may be entered in the DME control unit fault memory on model year 2007 vehicles manufactured before April 17, 2007.

Replacement of the DMTL unit is prescribed during diagnosis as the remedial action for fault code P1486.

WORK PROCEDURE

The following applies in this case:

Using the PIWIS Tester 9718 , check under => 'Control units' => 'DME' => 'Identification' to find the number of the data record in the DME control unit.
Compare this data record number with the data record numbers listed in Step 1.1.

If the last two digits of the data record number are lower than one of the numbers listed: => Step 2.

If the last two digits of the data record number are the same or higher than one of the numbers listed: => Step 3.
1. 1.1 DME data record numbers:
  Boxster
  
  987.618.644.02
  
  987.618.645.02
  
  987.618.664.02
  
  Cayman
  
  987.618.634.07
  
  987.618.635.07
The DME data record number you find is lower than the numbers specified in Step 1.1:
1. 2.1 Erase the fault memory, do not replace the DMTL unit.
2. 2.2 Program the DME control unit using the PIWIS Tester 9718 by selecting => 'DME' => 'Control unit programming' => 'Program control unit'. (The data record that applies as of 17 April 2007 is loaded).
  NOTE: PIWIS Tester software version V20.000 or higher is required for programming.
3. 2.3 Check whether the DMTL unit is defective.
  To do this, select the function => 'Tank leak test' under => 'DME' => 'Short test' and run this test twice in quick succession. Then read out the fault memory.
  
  If fault code P1486 is not stored: End of remedial action.
  
  If fault code P1486 is displayed: => Step 3
Replace the DMTL unit.
To do this, remove and install the carbon canister and replace the DMTL unit at the same time. See => - 20251900 Removing and installing carbon canister

End of remedial action.

PARTS INFO

997.605.125.01 - DMTL diagnostic module

PIWIS TESTER

The procedure described above for dealing with fault code P1486 is also integrated in => 'Guided Fault Finding' as of the next PIWIS Tester software version V21.000.

Software version V21.000 is available online from 2 April 2008 onwards, and as a DVD from around the middle of April.

REFERENCES

- 20251900 Removing and installing carbon canister

987110, 987120, 987310, 987320

Model year 2007

C02, C36