All 1996-1998 Saturn vehicles
Federal emission regulations require that a vehicle be able to display certain data when interrogated using an off-board tool. One group of data that must be displayed is Mode 6 Data. Within Mode 6 Data is a description of the EGR flow test results:
Test ID | $07 | Request EGR flow test results |
Comp ID | $0D | Request for deceleration test only |
Test Value | (0D) | Scaling of the test value is a 2's complement signed number: QEMDSTHR E=(N) counts (2 byte) |
Test Limit | (0D) | Scaling of the test value is a 2's complement signed number: QEMDSEWN E=(N) counts (2 byte) |
On all 1996-1998 Saturn vehicles, the EGR flow test results are incorrectly displayed in the reverse order. Instead of the test results being displayed Test Value first and Test Limit second, the Test Limit is displayed first and Test Value is displayed second. This must be taken into consideration when displaying Mode 6 Data or when developing communication tools that use Mode 6 Data communication.
The preceding information only affect off-board diagnostic communication tools
that use a Mode 6 Data request. The Saturn off-board diagnostic communication tools
(Tech 2, PDT, and SSS) do not use Mode 6 Data to interrogate any vehicle data.Important
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GM bulletins are intended for use by professional technicians,
NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to
provide information that could assist in the proper service of a
vehicle. Properly trained technicians have the equipment,
tools, safety instructions, and know-how to do a job properly and
safely. If a condition is described, DO NOT assume that the
bulletin applies to your vehicle, or that your vehicle will have
that condition. See your GM dealer for information on whether
your vehicle may benefit from the information. |
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