Pulled P0719 Fault code today??????
Thread Starter
Racer
Joined: Jun 2007
Posts: 459
Likes: 2
From: Hawaii
Pulled P0719 Fault code today??????
While driving today my SES light came on. When I got home I pulled the code P0719. I cleared the code and will see what happens next time I drive. I can't locate this code in any of my manuals to begin trouble-shooting. Does anyone know what the code P0719 means?
I have a 96 LT1....
I have a 96 LT1....
Racer
Joined: Dec 2006
Posts: 499
Likes: 27
From: shapleigh maine
Circuit Description
The brake switch indicates the status of the brake pedal. The normally-closed brake switch supplies a B+ signal on the circuit 420 to the PCM. Applying the brake pedal opens the signal voltage circuit. The PCM de-energizes the Torque Converter Clutch (TCC) Solenoid Valve when the PCM receives the signal.
DTC P0719 detects an open brake switch during accelerations. DTC P0719 is a type A DTC.
Conditions for Setting the DTC
No Vehicle Speed Sensor (VSS) DTC P0502
The PCM detects an open brake switch/circuit (0 volts) for 15 minutes without going off for 2 seconds, and the following events occur seven consecutive times:
The vehicle speed is less than 8 km/h (5 mph);
Then the vehicle speed is between 8 and 32 km/h (5 and 20 mph) for 4 seconds;
Then the vehicle speed is greater than 32 km/h (20 mph) for 6 seconds.
Action Taken When the DTC Sets
The brake switch remains closed (12 volts) with the brake pedal released.
Inhibit engagement of the TCC Solenoid Valve
Inhibit 4th gear if in hot mode
The freeze shift adapts from being updated.
The PCM illuminates the Malfunction Indicator Lamp (MIL).
Conditions for Clearing the DTC
The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported.
A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported.
The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM.
Diagnostic Aids
Inspect the wiring for any poor electrical connections at the PCM. Inspect the wiring at the TCC brake switch. Look for the following conditions:
A bent terminal
A backed out terminal
A damaged terminal
Poor terminal tension
A chafed wire
A broken wire inside the insulation
When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change.
Ask the customer about the customer's driving habits. Ask if the customer has any unusual driving conditions (e.g. stop-and-go, expressway, etc.).
Check for the most current calibration ID. Check for the latest bulletins.
Inspect the brake switch for proper mounting and adjustment.
Test Description
The numbers below refer to the step numbers on the diagnostic chart.
This Step tests for voltage at the brake switch.
This Step verifies that the brake switch is functioning normally.
This Step verifies that circuit 420 is functioning normally at the PCM.
pm me an email adress and I will send the three charts that go with this as they are gifs and I can't post them here
Bob
The brake switch indicates the status of the brake pedal. The normally-closed brake switch supplies a B+ signal on the circuit 420 to the PCM. Applying the brake pedal opens the signal voltage circuit. The PCM de-energizes the Torque Converter Clutch (TCC) Solenoid Valve when the PCM receives the signal.
DTC P0719 detects an open brake switch during accelerations. DTC P0719 is a type A DTC.
Conditions for Setting the DTC
No Vehicle Speed Sensor (VSS) DTC P0502
The PCM detects an open brake switch/circuit (0 volts) for 15 minutes without going off for 2 seconds, and the following events occur seven consecutive times:
The vehicle speed is less than 8 km/h (5 mph);
Then the vehicle speed is between 8 and 32 km/h (5 and 20 mph) for 4 seconds;
Then the vehicle speed is greater than 32 km/h (20 mph) for 6 seconds.
Action Taken When the DTC Sets
The brake switch remains closed (12 volts) with the brake pedal released.
Inhibit engagement of the TCC Solenoid Valve
Inhibit 4th gear if in hot mode
The freeze shift adapts from being updated.
The PCM illuminates the Malfunction Indicator Lamp (MIL).
Conditions for Clearing the DTC
The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported.
A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported.
The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM.
Diagnostic Aids
Inspect the wiring for any poor electrical connections at the PCM. Inspect the wiring at the TCC brake switch. Look for the following conditions:
A bent terminal
A backed out terminal
A damaged terminal
Poor terminal tension
A chafed wire
A broken wire inside the insulation
When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change.
Ask the customer about the customer's driving habits. Ask if the customer has any unusual driving conditions (e.g. stop-and-go, expressway, etc.).
Check for the most current calibration ID. Check for the latest bulletins.
Inspect the brake switch for proper mounting and adjustment.
Test Description
The numbers below refer to the step numbers on the diagnostic chart.
This Step tests for voltage at the brake switch.
This Step verifies that the brake switch is functioning normally.
This Step verifies that circuit 420 is functioning normally at the PCM.
pm me an email adress and I will send the three charts that go with this as they are gifs and I can't post them here
Bob
