WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
141
2007 W Series Chassis
WSM082106
DTC P0701
Step
Action
Yes
No
4
Add fluid to the proper level.
Is the fluid at the appropriate level?
Go to Step 5
—
5
Measure line pressure. Refer to Line Pressure Check Procedure .
Is the pressure within the specified value?
Go to Step 7
Go to Step 2
6
No main pressure at idle may be an indication of the following conditions:
• Stuck or sticking lube regulator valve
• Stuck or sticking main regulator valve
• Loose or damaged suction fi lter
• Defective suction fi lter seal
Did you find the reason for a no line pressure condition and was it repaired?
Go to Step 7
Go to Symptoms -
Automatic Transmission
7
Perform the following procedure in order to verify the repair:
1. Clear the DTC.
2. Start the engine.
3. Select Specific DTC.
4. Enter DTC P0701.
Has the test run and passed?
Go to Step 8
Go to Step 2
8
With the scan tool, observe the stored information, capture info, and DTC Info.
Does the scan tool display any DTCs that you have not diagnosed?
Go to Diagnostic
Trouble Code (DTC)
List - Vehicle
System OK
