Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Knock Sensor: Technical Service Bulletins
Engine Controls - Revised Knock Sensor Data Table
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 71-65-52
Date: July, 1997
SERVICE MANUAL UPDATE
Subject:
Section 6E - Revised Knock Sensor Noise Channel Scan Tool Information
Models:
1997 Buick Skylark
1997 Chevrolet Cavalier, Malibu
1997 Oldsmobile Achieva
1997 Pontiac Grand Am, Sunfire
1997 Chevrolet and GMC S/T Models
with 2.2L and 2.4L Engine (VINs 4, T - RPOs LN2, LD9)
This bulletin is being issued to revise the Engine Data 1 Scan Tool Data table for the following Service Manuals:
^
1997 GMP/97-J-2, pages 11 and 417
^
1997 GMP/97-N-2, page 9
^
1997 GMP/97-L/N-2, page 9
^
1997 GMP/97-S/T-2, page 416
In the Engine 1 Scan Tool Data table, the KS Noise Channel parameter will display a number from 0-255. This parameter is a rolling counter. When
engine knock is present, the KS Noise Channel parameter should increment to 255, reset to 0 and start incrementing again. If no engine knock is present,
the KS Noise Channel parameter does not increment.
In the Engine 1 Scan Tool Definitions, the range of the KS Noise channel should indicate the 0-255 rolling counter.
Please mark up your Service Manual with these revisions.
