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For 1990-2009 cars only
Makes 🢒 Holden 🢒 2005 🢒 Commodore Berlina 🢒 DTC 🢒 DTC P0719

DTC P0719 V6

DTC Description

This diagnostic procedure supports DTC P0719 Brake Switch Circuit High Voltage.

Circuit Description

The transmission control module (TCM) has a direct input from the stop lamp switch assembly. When the brake pedal is pressed, 12 V is supplied to the TCM through connector A112-X1 pin 42.

When the TCM detects a voltage on the stop lamp switch signal circuit during acceleration, then DTC P0719 sets. DTC P0719 is a type C DTC.

Refer to Automatic Transmission Controls Schematics , Automatic Transmission Inline 20-Way Connector End View, Automatic Transmission Internal Connector End Views , Automatic Transmission Control Module Connector End Views , and Automatic Transmission Related Connector End Views to aid in diagnosis.

Conditions for Running the DTC
    • No DTCs P0722, P0723 or P0724.
    • The vehicle speed is 8-40 km/h for 6 seconds, then greater than 40 km/h for 7 seconds.

Conditions for Setting the DTC

The TCM detects voltage on the stop lamp switch signal circuit during acceleration.

Action Taken When the DTC Sets
    • The TCM does not request the engine control module (ECM) to illuminate the check powertrain icon.
    • The TCM records the operating conditions when the conditions for setting the DTC are met. The TCM records this information as a Failure Record.
    • The TCM stores DTC P0719 in TCM history.

Conditions for Clearing 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.
    • Tech 2 can clear the DTC.

Diagnostic Aids
    • Verify the brake pedal position sensor is adjusted properly, refer to Stop Lamp Switch Testing.
    • Test drive the vehicle if a switch or circuit condition cannot be located. An intermittent condition may be duplicated during a test drive.
    • Application of the brake pedal while accelerating may cause this DTC to set.

Test Description

The following numbers refer to the step numbers in the diagnostic table:

2 Checks the stop lamp switch is serviceable.

4 Checks if there is a stop lamp switch signal to the TCM.

Step

Action

Yes

No

1

Has the Diagnostic System Check been performed?

Go to Step 2

Refer to Diagnostic System Check - Automatic Transmission

2
  1. Connect Tech 2 to the DLC.
  2. On Tech 2 select: Engine/V6 Engine/Data Display/Cruise/Traction Data.
  3. Turn on the ignition, with the engine off.
  4. Ensure the brake pedal is in the rest position.

Does the Stop Lamp Pedal Switch parameter indicate Inactive?

Check for an intermittent fault in the circuit, refer to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Test the stop lamp switch assembly, refer to Stop Lamp Switch Testing.

Is the stop lamp switch assembly serviceable?

Go to Step 4

Replace the stop lamp switch assembly. Refer to Stop Lamp Switch Replacement

4
  1. Disconnect connector A112-X1 from the TCM.
  2. Using a mulitmeter set to measure voltage, probe between harness connector A112-X1 pin 42 and a known ground.
  3. Ensure the brake pedal is in the rest position.

Does the multimeter display battery voltage?

Repair or replace circuit 20

Go to Step 6

Go to Step 5

5

Replace the TCM, refer to Transmission Control Module Replacement

Did you complete the replacement?

Go to Step 6

--

6

Perform the following procedure in order to verify the repair:

  1. On Tech 2 select: Diagnostic Trouble Codes/Clear Engine and Transmission DTCs.
  2. Follow the instructions on Tech 2 and clear any DTCs.
  3. Operate the vehicle under the following conditions:
    4. • Turn on the ignition, with the engine off for at least 2 seconds.
    • Start the vehicle and idle for 5 seconds.
    • Drive in D4 from 0-60 km/h 8 times in 1 ignition cycle.
  4. On Tech 2 select: Diagnostic Trouble Codes/Read DTC Information.

Has DTC P0719 set?

Go to Step 2

Go to Step 7

7

On Tech 2 select: Diagnostic Trouble Codes/Read DTC Information.

Does Tech 2 display any DTCs you have not diagnosed?

Refer to Diagnostic Trouble Code (DTC) List/Type

System OK

When all diagnosis and repairs are completed, check the system for correct operation.