Allison B 400 - Electronic Fluid Level Check (Pro-Link 9000)

WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
5–4 Copyright © 1998 General Motors Corp.
OIL LEVEL SENSOR
5–2. ELECTRONIC FLUID LEVEL CHECK (PRO-LINK
®
9000)
The Pro-Link
®
9000 can also be used to electronically check the transmission fluid level. Further detail is also
provided in Appendix N of this manual.
A. Fluid Level Check Procedure
1. Connect the DDR to the DDR connector.
2. Scroll (down) the Diagnostic Data List to “OIL LVL” display.
3. Read the fluid level, repeat the check to confirm the first reading.
NOTE: The ECU may delay the fluid level check until the following conditions are met:
•
The fluid temperature is above 60°C (140°F) or below 104°C (220°F).
•
The transmission is in neutral.
•
The vehicle has been stationary for approximately two minutes to allow the fluid to settle.
•
The engine is at idle (below 1000 rpm — not “fast” idle).
The reason for a delayed fluid level check is indicated on the DDR by one of the following diagnostic messages as
shown in Table 5–2:
Table 5–2.
CAUTION:
A low or high fluid level causes overheating and irregular shift patterns and, if not
corrected, can damage the transmission.
DDR MESSAGE
O L — SETTLING TIME (8 down to 1)
O L — ENGINE SPEED LO
O L — ENGINE SPEED HI
O L — SELECT N (NEUTRAL)
O L — SUMP TEMP LO
O L — SUMP TEMP HI
O L — OUTPUT SPEED HI
O L — CHECK CODES