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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P2771) >> DTC P0719 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Hummer H2. 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.

  1. 3:  This step isolates the brake switch as a source for setting the DTC.
DTC P0719

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
    3. IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Failure Records. Using the Clear Info function erases the Failure Records from the PCM.
  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Select Brake Switch on the scan tool.
    6. CAUTION: Refer to SIR Caution .
  6. Disconnect the brake switch connector from the brake switch.
  7. Connect a test lamp from the ignition 3 voltage circuit of the brake switch connector to ground.
Does the test lamp illuminate?		 - Go to Step 3  Go to Step 4 
3  Connect a fused jumper wire between the ignition voltage circuit and the brake switch/cruise control release signal circuit of the brake switch connector.
Did the Brake Switch status parameter on the scan tool change from Open to Closed?		 - Go to Step 7  Go to Step 9 
4 Inspect the BRAKE fuse for an open. Refer to Circuit Protection - Fuses .
Is the fuse open?		 - Go to Step 5  Go to Step 8 
5 Test the ignition voltage circuit of the brake switch for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 6 
6
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.
Test the signal circuit of the brake switch for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs .Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
7 Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement .
Did you complete the replacement?		 - Go to Step 11  -
8 Test the ignition voltage circuit of the brake switch for an open. Refer to Testing for Continuity and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 11  -
9
IMPORTANT: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics for complete circuit distribution.
Test the signal circuit of the brake switch for an open. Refer to Testing for Continuity and Wiring Repairs .Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
10 Replace the PCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 11  -
11 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Turn ON the ignition, with the engine OFF.
  4. Apply and release the brake pedal.
  5. Verify that the scan tool Brake Switch status indicates Closed, 12 volts, for 2 seconds.
  6. Select Specific DTC.
  7. Enter DTC P0719.

Has the test run and passed?		 - Go to Step 12  Go to Step 2 
12 With the 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 System OK
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