Test Description
WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the step number on the diagnostic table.
- 2:
Listen for a soft rattling sound when the solenoid energizes. Use a stethoscope if necessary.
DTC P2763
| Step |
Action |
Value(s) |
Yes |
No |
| 1 |
Did you perform the Diagnostic System Check - Vehicle? |
- |
Go to Step 2 |
Go to Diagnostic System Check - Vehicle
in Vehicle DTC Information |
| 2 |
- Install a scan tool.
- Turn ON the ignition with the engine OFF.
IMPORTANT:
- Before clearing the DTC, use the scan tool in order to record the ECM Freeze Frame and the TCM Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the ECM and the TCM.
- Using the Clear Info function erases stored DTCs in both the ECM and TCM.
- Record the DTC Freeze Frame and Failure Records.
- Clear the DTC.
- Use the scan tool in order to command the TCC PWM solenoid ON.
Does the solenoid operate? |
- |
Go to Step 8 |
Go to Step 3 |
| 3 |
- Turn OFF the ignition.
- Disconnect the AT 20-way inline harness connector.
- Install the J 45681
jumper harness to the TCM side of the 20-way connector. See Special Tools
.
- Turn ON the ignition with the engine OFF.
- With the test lamp connected to ground, probe the solenoid supply voltage circuit of the J 45681
. See Special Tools
.
Does the test lamp illuminate? |
- |
Go to Step 4 |
Go to Step 6 |
| 4 |
- Turn OFF the ignition.
- Install the J 45681
to the transmission side of the 20-way connector. See Special Tools
.
- Using the DMM, measure the resistance between the solenoid supply voltage circuit and the TCC PWM solenoid valve control circuit of the J 45681
. See Special Tools
. Refer to Component Resistance
.
Is the resistance within the specified range? |
10.0-13.6 ohm |
Go to Step 5 |
Go to Step 7 |
| 5 |
- Disconnect the TCM.
- Test the TCC PWM solenoid valve control circuit and the solenoid supply voltage for an open or a short to voltage. Refer to Testing for a Short to Voltage
in Wiring Systems.
Did you find and correct the condition? |
- |
Go to Step 11 |
Go to Step 8 |
| 6 |
- Turn OFF the ignition.
- Disconnect the TCM.
- Test the solenoid supply voltage circuit and the solenoid valve control circuit from the TCM to the TCC PWM solenoid valve for an open circuit. Refer to Testing for Continuity
in Wiring Systems.
Did you find a condition? |
- |
Go to Step 11 |
Go to Step 8 |
| 7 |
- Remove the transmission oil pan.
- Test the solenoid supply voltage circuit from the 20-way connector to the TCC PWM solenoid valve connector for an open or short to voltage. Refer to Testing for a Short to Voltage
in Wiring Systems.
Did you find a condition? |
- |
Go to Step 9 |
Go to Step 10 |
| 8 |
Replace the TCM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming.
Is the action complete? |
- |
Go to Step 11 |
- |
| 9 |
Replace the AT internal transmission wiring harness. Refer to Transmission Internal Electrical Harness Replacement
.
Is the action complete? |
- |
Go to Step 11 |
- |
| 10 |
Replace the TCC PWM solenoid valve. Refer to Torque Converter Clutch (TCC) Solenoid Replacement
.
Is the action complete? |
- |
Go to Step 11 |
- |
| 11 |
Perform the following procedure in order to verify the repair:
- Select DTC.
- Select Clear Info.
- Start the engine.
- Drive the vehicle with the TCC Duty Cycle above 40 percent for 5 seconds.
- Select Specific DTC.
- Enter DTC P2763.
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
in Vehicle DTC Information |
System OK |