Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step isolates the brake switch as a source for setting the DTC.
DTC P0719 (4.2L)
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Engine Controls? | - | Go to Step 2 | Go to Diagnostic System Check - Engine Controls in Engine Controls-4.2L |
| 2 |
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.
CAUTION:
Refer to SIR Caution
in Cautions and Notices.
|
- | Go to Step 3 | Go to Step 4 |
| 3 | Connect a fused jumper wire between terminal C and terminal D of the brake switch connector. Did the TCC Brake Switch status on the scan tool change from Open to Closed? |
- | Go to Step 7 | Go to Step 9 |
| 4 | Inspect the ABS fuse for an open. Refer to Circuit Protection - Fuses in Wiring Systems. Is the fuse open? |
- | Go to Step 5 | Go to Step 8 |
| 5 |
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 ignition voltage circuit of the brake switch for a short to ground.Refer to Testing for Short to Ground
and Wiring Repairs
in Wiring Systems.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
in Wiring Systems.Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 10 |
| 7 | Replace the brake switch. Refer to Stop Lamp Switch Replacement in Lighting Systems. Did you complete the replacement? |
- | Go to Step 11 | - |
| 8 |
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 ignition voltage circuit of the brake switch for an open.Refer to Testing for Continuity
and Wiring Repairs
in Wiring Systems.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
in Wiring Systems for complete circuit distribution. Test the signal circuit of the brake switch for an open.Refer to Testing for Continuity
and Wiring Repairs
in Wiring Systems.Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 10 |
| 10 | Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement in Engine Controls - 4.2L. Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 | Perform the following procedure in order to verify the repair:
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 in Engine Controls - 4.2L | System OK |