WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
323
2007 W Series Chassis
WSM082106
– A damaged terminal
– Poor terminal tension
– A chafed wire
– A broken wire inside the insulation
• When diagnosing for an intermittent short or open,
massage the wiring harness while watching the test
equipment for a change.
• You may have to drive the vehicle in order to experience
a condition.
• Vehicle accessories imposing a large load on the battery
circuit could also cause this DTC to set.
• Loose or corroded battery cables could allow this DTC to
set.
• An internal TCM failure, due to a burn up circuit trace,
could allow this DTC to set.
• Vehicle charging system failure may cause this DTC to
set under certain circumstances.
• A defective vehicle battery may induce this DTC.
• Running the engine with a battery charger attached may
cause this DTC to set.
Test Description
The number below refers to the step number on the
diagnostic table.
3. This step tests for proper TCM battery direct voltage.
