WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
267
2007 W Series Chassis
WSM082106
DTC P0827
Step
Action
Value
Yes
No
9
Replace the AT driver shift request switch. Refer to Shift Lever Replacement .
Did you complete the replacement?
—
Go to Step 11
—
10
IMPORTANT:
In most cases, the TCM is not at fault. Investigate thoroughly
In most cases, the TCM is not at fault. Investigate thoroughly
before replacing the TCM.
before replacing the TCM.
Replace the TCM. Refer to Control Module References for replacement, setup,
and programming.
Did you complete the replacement?
—
Go to Step 11
—
11
Perform the following procedure in order to verify the repair:
1. Clear the DTC.
2. Operate the vehicle while using the driver shift request switch.
3. Select Specific DTC.
4. Enter DTC P0827.
Has the test run and passed?
—
Go to Step 12
Go to Step 2
12
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
