LW2 V6-3.0L VIN R (2000)
Control Module: All Technical Service Bulletins
Engine/Transmission Controls - MIL ON/DTC P1811 Set
BULLETIN NO.: 02-T-84
ISSUE DATE: November, 2002
CATEGORY TYPE: Transaxle-18
CATEGORY: Automatic
CORPORATION NO.: 02-07-30-049
SUBJECT:
Service Wrench Lamp Illuminated with DTC P1811 "Maximum Adapt and Long Shifts" (Inspect Transaxle and Install New TCM Calibration
24222073)
MODELS AFFECTED:
2000 Saturn L-Series vehicles equipped with V6 (L81) engine and automatic transaxle (MN5)
CONDITION:
Service Wrench lamp illuminated with DTC P1811 "Maximum Adapt and Long Shifts." Vehicle will also have full line pressure shifts when DTC P1811
is set.
CAUSE:
DTC P1811 will set if any adapt cell is at maximum and any shift time reaches .65 seconds. In the original 2000 model year TCM calibration, cruise
shifts were commanded to have a shift time of zero (0) seconds so the adaptives would max out for shifts made in cruise. If any other shift cell shows a
long shift time, the DTC will set.
CORRECTION:
Check the pressure control solenoid function with the line pressure test below. If the pressure control (PC) solenoid passes, install TCM calibration
24222073. Otherwise, replace PC solenoid and install TCM calibration.
SERVICE PROCEDURE
1.
Test drive vehicle with Tech 2. Evaluate shift times (1-2, 2-3 and 34 upshifts). Are any times greater than 0.65 seconds?
^
If none of the shift times exceed 0.65 seconds, reflash TCM with calibration 24222073. Repair is complete at this time.
^
If one or more shift times exceed 0.65 seconds, perform the line pressure test below.
Line Pressure Test
CAUTION:
KEEP BRAKES APPLIED AT ALL TIMES IN ORDER TO PREVENT UNEXPECTED VEHICLE MOTION.
NOTICE:
Total test running time should not be longer than two minutes. Otherwise, transmission damage could occur.
