DTC P0719 3.8L
Circuit Description
The torque converter clutch (TCC) brake switch indicates brake pedal status to the transmission control module (TCM). The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the TCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the TCM. When the TCM receives 0 volts at the TCC brake switch input, the TCM turns OFF the torque converter clutch pulse width modulation (TCC PWM) solenoid valve.
If the TCM detects an open brake switch, indicating pedal applied during a number of accelerations, then DTC P0719 sets. DTC P0719 is a type C DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0719 Brake Switch Circuit Low Voltage
Conditions for Running the DTC
| • | DTC P0719 has not passed this ignition cycle. |
| • | No VSS DTC P0722 or P0723. |
Conditions for Setting the DTC
The TCC brake switch indicates continuously OPEN (0 volts) for more than 15 minutes and the following conditions occur 8 times consecutively.
- The vehicle speed is less than 13 km/h (8 mph).
- The vehicle speed is between 13-52 km/h (8-32 mph) for 3 seconds.
- The vehicle speed remains above 52 km/h (32 mph) for 6 seconds.
Action Taken When the DTC Sets
| • | The TCM does not illuminate the malfunction indicator lamp (MIL). |
| • | The TCM disregards the TCC brake switch for TCC scheduling when all of the following conditions are met: |
| - | The TP angle is greater than 6 percent. |
| - | The vehicle speed is greater than 59 km/h (37 mph). |
| - | The TP angle was previously greater than 12 percent while the vehicle speed was greater than 67 km/h (42 mph). |
| - | The TCC brake switch has not indicated OFF for more than 2 seconds this trip. |
| • | The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records. |
| • | The TCM stores DTC P0719 in PCM history. |
Conditions for Clearing the DTC
| • | A scan tool can clear the DTC. |
| • | The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring. |
| • | The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes. |
Test Description
The number below refers to the step number on the diagnostic table.
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 DTC Information function will erase the stored Failure Records from the TCM. Does the scan tool display Closed? | -- | Go to Intermittent Conditions in Engine Controls - 3.8L | Go to Step 3 |
3 |
Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems for complete circuit distribution.
Refer to Circuit Protection - Fuses in Wiring Systems. Was the fuse open? | -- | Go to Step 4 | Go to Step 5 |
4 |
Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems for complete circuit distribution.
Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | -- |
Caution: Refer to SIR Caution in the Preface section. Does the scan tool display Closed? | -- | Go to Step 8 | Go to Step 6 | |
6 | Test the ignition 1 voltage circuit of the TCC brake switch for an open between the fuse block and the brake switch. Refer to Testing for Continuity and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
7 | Test the signal circuit of the TCC brake switch for an open between the TCM and the brake switch. Refer to Testing for Continuity and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 |
8 | Replace the brake pedal position sensor. Refer to Brake Pedal Position Sensor Replacement in Lighting Systems. Did you complete the repair? | -- | Go to Step 10 | -- |
9 | Replace the TCM. Refer to Control Module References in Computer/Integrating Systems for replacement, set-up and programming. Did you complete the repair? | -- | Go to Step 10 | -- |
10 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | Go to Step 11 | Go to Step 2 |
11 | 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 |
