WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
5–2 Copyright © 1998 General Motors Corp.
OIL LEVEL SENSOR
5. Correct fluid level is reported when
O L
is displayed (
O L
indicates the Oil Level Check Mode),
followed by
O K
. The
O K
display indicates the fluid level is within the
O K
zone. The sensor
display and the transmission dipstick may not agree exactly because the oil level sensor
compensates for fluid temperature.
Example:
O L, O K,
O K
— Indicates correct fluid level
6. Low fluid level is reported when
O L
is displayed, followed by
L O
and a number.
L O
indicates a
low fluid level and the number is the number of quarts of fluid the transmission requires.
Example:
O L, L O, 0 2
— Indicates 2 additional quarts of fluid will bring the fluid level within
the middle of the
O K
zone.
7. High fluid level is reported when
O L
is displayed, followed by
H I
.
H I
indicates high fluid level
and the number of quarts the transmission is overfilled.
Example:
O L, H I, 0 1
— Indicates 1 quart of fluid past the full level.
8. An Invalid for Display condition is reported when
O L
is displayed, followed by “– –” and a
number display. The displayed number is a fault code, and indicates improper conditions or a
system malfunction.
Example:
O L,
– – ,
70
— Indicates an Invalid for Display condition and fault code 70.
9. Invalid for Display is activated when conditions do not allow the fluid level to be checked
electronically. Review the following codes and conditions, and correct as necessary. If these
conditions cannot be corrected, contact the nearest distributor or dealer in your area (check the
telephone directory for the Allison Transmission service outlet nearest you).
10. To exit the oil level display mode:
•
Pushbutton shift selector — press the
R
(Reverse),
N
(Neutral), or
D
(Drive) pushbutton.
•
Lever shift selector — press the
DISPLAY MODE
button two times or move the lever.
11. The strip pushbutton selector indicates fluid level as follows:
a. Initiate display of oil level information using separate switch provided by the vehicle
manufacturer.
b. Correct Fluid Level — Indicated by a flashing red LED on the
N
(Neutral) pushbutton. When
this occurs, the fluid is within the “
O K
” zone.
CAUTION:
A low or high fluid level causes overheating and irregular shift patterns. An incorrect
fluid level can damage the transmission.
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