WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
422
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
DTC P2730
Step
Action
Value
Yes
No
Schematic Reference: Automatic Transmission Controls Schematics
1
Did you perform the Diagnostic System Check - Vehicle?
—
Go to Step 2
Go to Diagnostic
System Check -
Vehicle
2
1. Install the scan tool.
2. Turn ON the ignition, with the engine OFF.
IMPORTANT:
Before clearing the DTC, use the scan tool in order to
Before clearing the DTC, use the scan tool in order to
record the Freeze Frame and Failure Records for reference.
record the Freeze Frame and Failure Records for reference.
The Clear Info function will erase the data.
The Clear Info function will erase the data.
3. Record the DTC Freeze Frame and Failure Records.
4. Clear the DTC.
5. Using the scan tool, measure ignition voltage.
Is voltage within the specified value?
9-18 V
Go to Step 3
Go to DTC P0562
for low voltage or
DTC P0563 for
high voltage
3
1. Turn the ignition OFF.
2. Disconnect the 80-way connector at the TCM.
3. Install the J 39700 breakout box, the J-47275 breakout box adapter
and the J 47275-1 magnetic overlay.
4. Turn ON the ignition, with the engine OFF.
5. Using the DMM, measure voltage between connector terminal 55
and ground.
6. Using the scan tool, command PCS1 ON.
Is the voltage within the specified value when the PCS1 is commanded ON?
Less than battery
voltage
Go to Testing
for Intermittent
Conditions and
Poor Connections
Go to Step 4
4
1. Turn the ignition OFF.
2. Disconnect the TCM from the J 39700 . Additional DTCs may set.
3. Turn ON the ignition, with the engine OFF.
4. Using the DMM, measure voltage at terminal 55 and ground.
Is the voltage greater than the specified value?
0 V
Go to Step 5
Go to Testing
for Intermittent
Conditions and
Poor Connections
