SW1 L4-1.9L SOHC VIN 8 (1996)
Engine Control Module: All Technical Service Bulletins
MIL ON - DTCs P0301 & P0304/P0302 & P0303 No Misfire
BULLETIN NO.: 96-T-60
ISSUE DATE: October, 1996
GROUP/SEQ. NO.: Engine-14
CORPORATION NO.: 686007
SUBJECT:
MIL (SERVICE ENGINE SOON Telltale Lamp) On with DTC P0300 and Possible Pairs of DTCs P0301 and P0304, and/or P0302 and P0303 in PCM
memory (Relearn Crankshaft Adaptives)
MODELS AFFECTED:
1996 Saturns
CONDITION:
Malfunction indicator lamp (MIL) (SERVICE ENGINE SOON telltale lamp) On with no driveability complaints. Diagnostic trouble code (DTC) P0300
in PCM memory, possibly with pairs of the following DTCs: P0301 and P0304, and/or P0302 and P0303.
CAUSE:
Possible inaccurately learned crankshaft characteristics.
CORRECTION:
Using a Scan tool or the Saturn service stall system (SSS), inspect for DTCs. If any DTCs, other than the misfire DTCs are present, or if any misfires can
be felt in the engine, refer to diagnostic procedures in the "1996 Powertrain Controls Service Manual."
Using the Scan tool or SSS, display the misfire table. If equal number of misfires are registered by cylinder pairs 1 and 4, and/or 2 and 3, then the
crankshaft profile may have been inaccurately learned.
^
Follow the procedure in this bulletin to relearn crankshaft adaptives.
^
If misfires are not registered equally in cylinder pairs, refer to the diagnostic procedures in the "1996 Powertrain Controls Service Manual."
PROCEDURE
Reset and Relearn Crankshaft Adaptives using the Following Procedure (Using the Service Stall System):
^
Key On, Engine Off
^
Identify the Vehicle
^
Select Dynamic Display (# 3) from the Main Menu
^
Select View Serial Data (# 1)
^
Select PCM/EC (# 1)
^
Record and clear all diagnostic trouble codes (DTCs)
1.
Select General Information (# 1)
2.
Press F8 to select Trouble Codes
3.
Capture all information on non-misfire DTCs. (Refer to "1996 Powertrain Controls Service Manual.")
4.
Press F5 to Clear Codes (bottom of screen)
5.
Press ESC (escape) (return to previous menu)
^
Select Vehicle ID Table (# 2)
^
Press F7 to select Reset Adaptives (bottom of screen)
