P0719
DTC P0719 or P0724
Diagnostic Instructions
* Perform theDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0719
- Brake Switch Circuit Low Voltage
DTC P0724
- Brake Switch Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The brake switch indicates brake pedal status to the control solenoid (w/body and TCM) valve assembly. The normally-open brake switch supplies ignition voltage to the TCM. Applying the brake pedal closes the switch, suplying voltage to the TCM. Releasing the brake pedal interrupts voltage to the TCM.
Conditions for Running the DTC
P0719
* No OSS DTCs P0722 or P0723.
* DTC P0719 has not passed this ignition cycle.
P0724
* No OSS DTCs P0722 or P0723.
* DTC P0724 has not passed this ignition cycle.
Conditions for Setting the DTC
P0719
DTC P0719 sets if the TCM detects an open brake switch or circuit and the following conditions occur eight times:
* The vehicle speed is less than 8 km/h (5 mph) for 2 seconds;
* then, the vehicle speed is greater than 32 km/h (20 mph) for 6 seconds;
* then, the vehicle speed is 8-32 km/h (5-20 mph) for 6 seconds.
P0724
DTC P0724 sets if the TCM detects a closed brake switch or circuit, 12 volts, for 15 minutes during vehicle acceleration and the following conditions occur eight times:
* The vehicle speed is less than 8 km/h (5 mph) for 1 second;
* then, the vehicle speed is 8-32 km/h (5-20 mph) for 6 seconds;
* then, the vehicle speed is greater than 32 km/h (20 mph) for 6 seconds.
Action Taken When the DTC Sets
DTCs P0719 and P0724 are Type C DTCs.
Conditions for Clearing the DTC
DTCs P0719 and P0724 are Type C DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Electrical Information Reference
* Circuit Protection - Fuses (Component Tests and General Diagnostics)
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Circuit/System Verification
Start the engine. With the vehicle in Park, observe the Brake Switch parameter on the scan tool. The Brake Switch parameter should display Released with the brake pedal released. Apply the brake pedal and the Brake Switch parameter should display Applied.
Circuit/System Testing
1. Install a scan tool. Turn ON the ignition, leaving the engine OFF. Observe the Brake Switch parameter. The parameter should display Released.
• If the scan tool displays Applied, disconnect the stop lamp switch connector.
2. Observe the Brake Switch parameter on the scan tool with the stop lamp switch connector disconnected. The parameter should display Applied.
• If the scan tool displays Released after the stop lamp switch connector disconnected, test the stop lamp switch.
• If the scan tool displays Applied after the stop lamp switch connector is disconnected, test the stop lamp switch signal circuit for a short to voltage.
3. While observing the brake switch parameter on the scan tool, use a terminal test kit and install a fused jumper wire between the stop lamp voltage circuit and the stop lamp switch signal circuit. The brake switch parameter should change from Released to Applied when the fused jumper wire is installed.
• If the brake switch parameter changes, replace the stop lamp switch.
4. Inspect the stop lamp fuse; refer toCircuit Protection - Fuses (Component Tests and General Diagnostics) . The fuse should not be blown.
• If the fuse is blown, test the voltage circuit and the stop lamp switch signal circuit for a short to ground.
5. Using a DMM, measure the voltage between the voltage circuit and ground at the stop lamp switch connector. The voltage should be near 12 volts.
• If the voltage is not near the specified voltage, test the voltage circuit for an open or high resistance.
6. Using a terminal test kit measure the resistance of the stop lamp switch signal circuit between the TCM and the stop lamp switch. The resistance should be less than 10 ohms.
• If the resistance is greater than 10 ohms, test the stop lamp switch signal circuit for an open or high resistance.
• If all circuits and connections test normal, replace the control solenoid (w/body and TCM) valve assembly.
Component Testing
With the stop lamp switch removed, use a DMM to measure resistance across the pins of the voltage circuit and the stop lamp switch signal circuit. With the stop lamp switch plunger released, the DMM resistance should display infinite resistance. With the stop lamp plunger depressed the stop lamp switch resistance should be less than 10 ohms.
Repair Instructions
Perform theDiagnostic Repair Verification (Verification Tests) after completing the repair.
* Control solenoid (w/body and TCM) valve assembly - refer toControl Module References (Programming and Relearning) for replacement, setup, and programming
* Perform theControl Solenoid Valve and Transmission Control Module Assembly Inspection (Control Solenoid Valve and Transmission Control Module Assembly Inspection) .
* Stop Lamp Switch Replacement (Adjustable Pedal) (Stop Lamp Switch Replacement (Adjustable Pedal))Stop Lamp Switch Replacement (Non-Adjustable Pedal) (Stop Lamp Switch Replacement (Non-Adjustable Pedal))