– The oil temperature must be between 15°C
(60°F) and 93°C (200°F).
NOTE: The above conditions must be
maintained during the procedure to keep the
procedure from being aborted.
The Quick Learn procedure is performed with
the DRBIIIt by selecting “Transmission” system
then “Miscellaneous” functions, then “Quick
Learn”. Follow the procedure instructions dis-
played on the DRBIIIt.
3.3.10 CLUTCH VOLUMES
Theory of Operation: The volumes of the trans-
mission fluid needed to apply the friction elements
are continuously monitored and learned for adap-
tive controls. As the clutch friction material wears,
the volume of fluid needed to apply the clutch
increases. The following are typical clutch vol-
umes, the clutches may be damaged if the volumes
are greater or less than the specified below:
The LR clutch volume is updated when doing a 2-1
or 3-1 coast down shift. The transmission temper-
ature must be between 21-49°C (70-120°F). The
clutch volume should be between 35 and 83.
The 2/4 clutch volume is updated when doing a 1-2
shift. The transmission temperature must be above
43°C (110°F). The clutch volume should be between
20 and 77.
The OD clutch volume is updated when doing a 2-3
shift. The transmission temperature must be above
43°C (110°F). The clutch volume should be between
40 and 150.
The UD clutch volume is updated when doing a 4-3
or 4-2 shift. The transmission temperature mustbe
above 43°C (110°F). The clutch volume should be
between 24 and 70.
Transmission effects: These codes usually set
with other DTC’s, which indicates an internal
transmission problem.
Possible causes:
> Clutch pack clearance out of spec
> Snap ring out of position or broken
> Broken return spring
> Hydraulic leak into clutch circuit with near-zero
volume
3.3.11 ELECTRONIC PINION FACTOR (IF
APPLICABLE)
Using the following steps, the pinion factor can
be checked and/or reset using the DRBIIIt:
1. Select Transmission system, then Miscella-
neous functions, then Pinion Factor. The
DRBIIIt will display the current tire size.
2. If the tire size is incorrect, press the Enter key
and then select the correct size.
3. Press the Page Back key to exit the reset proce-
dure.
Notes About Electronic Pinion Factor Features
The nature of the electronic pinion factor requires
that certain features must be taken into consider-
ation.
> If no pinion factor is stored in an installed
PCM, the vehicle speedometer will not oper-
ate, engine speed will be limited to 2300
RPM, and catalyst damage may occur.
> Selecting a wrong tire size will cause the
speedometer to be inaccurate and will also
cause any speed related features to operate
improperly.
NOTE: After replacing the PCM, you must
reprogram pinion factor
3.4 USING THE DRBIIIT
Refer to the DRBIIIt user’s guide for instruc-
tions and assistance with reading trouble codes,
erasing trouble codes, and other DRBIIIt func-
tions.
3.5 DRBIIIT ERROR MESSAGES
Under normal operation, the DRBIIIt will dis-
play one of only two error messages:
– User−Requested WARM Boot
– User−Requested COLD Boot
19
GENERAL INFORMATION
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