Test Description
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. 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.
- 3: If the scan tool indicates Closed in Step 2, and Open when the TCC brake switch is disconnected, the switch is stuck closed.
DTC P0724 (3.8L)
| 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 |
IMPORTANT:
Before clearing the DTCs, use the scan tool in order to record the Failure Records for reference. Using the Clear Info function will erase the stored Failure Records from the TCM.
|
- | Go to Intermittent Conditions in Engine Controls - 3.8L | Go to Step 3 |
| 3 |
CAUTION:
Refer to SIR Caution
in Cautions and Notices.
|
- | Go to Step 5 | Go to Step 4 |
| 4 | Test the signal circuit of the TCC brake switch for a short to voltage between the TCM and the TCC brake switch. Refer to Testing for a Short to Voltage and Wiring Repairs in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 7 | Go to Step 6 |
| 5 | Replace the brake pedal position sensor. Refer to Brake Pedal Position Sensor Replacement in Lighting Systems. Did you complete the replacement? |
- | Go to Step 7 | - |
| 6 | Replace the TCM. Refer to Control Module References in Computer/Integrating Systems for replacement, set-up or programming. Did you complete the replacement? |
- | Go to Step 7 | - |
| 7 | Perform the following procedure in order to verify the repair:
Has the test run and passed? |
- | Go to Step 8 | Go to Step 2 |
| 8 | With a 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 |