WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
427
2007 W Series Chassis
WSM082106
DTC P2761
Step
Action
Value
Yes
No
5
1. Remove the transmission oil pan. Refer to Oil Pan Replacement.
2. Remove the AT internal wiring harness at the TCC PCS connector.
3. Using the DMM, measure the resistance of the TCC PCS.
Is the solenoid resistance within the specified value?
5.05 ohms at 20°C
(68°F)
Go to Step 7
Go to Step 8
6
Test the TCC PCS circuit between the TCM and the AT inline 20-way con-
nector for an open condition. Refer to Testing for Continuity .
Did you find and correct the condition?
—
Go to Step 10
Go to Step 9
7
Replace the AT internal wiring harness. Refer to Wiring Harness
Replacement .
Did you complete the replacement?
—
Go to Step 10
—
8
Replace the TCC PCS. Refer to Control Valve Solenoid Replacement .
Did you complete the replacement?
—
Go to Step 10
—
9
IMPORTANT:
In most cases, the TCM is not at fault. Investigate thorough-
In most cases, the TCM is not at fault. Investigate thorough-
ly before replacing the TCM.
ly 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 10
—
10
Perform the following procedure in order to verify the repair:
1. Clear the DTC.
2. Drive the vehicle under normal operating conditions.
3. Select Specific DTC.
4. Enter DTC P2761.
Has the test run and passed?
—
Go to Step 11
Go to Step 2
