P0573-BRAKE SWITCH 1 STUCK OFF
P0573-BRAKE SWITCH 1 STUCK OFF
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Brake Pedal sensor information is a bussed message to the Powertrain Control Module (PCM) from the ABS module.
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When Monitored:
Ignition on and battery voltage above 10.4 Volts.
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Set Condition:
The brake switch status is equal to on and the no brake switch status is equal to off for a calibrated amount of time.
Possible Causes |
|---|
| CAN BUS FAILURE |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| NOTE: | Diagnose any Communication DTCs before continuing. |
| 1. | Ignition on |
| 2. | With the scan tool, select View DTCs. |
| NOTE: | It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. |
Is the DTC Active or Pending at this time?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. BRAKE SWITCH SENSOR CIRCUIT DTCS SET IN THE ABS MODULE
Are any Brake Pedal Sensor Circuit DTCs set in the ABS module?
Yes
- Diagnose the appropriate Brake Switch DTC in the ABS module. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing).
No
- Go To 3
3. POWERTRAIN CONTROL MODULE (PCM)
| 1. | Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Antilock Brake Module (ABS) and the Powertrain Control Module (PCM). |
| 2. | Look for any chafed, pierced, pinched or partially broken wires. |
| 3. | Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. |
| 4. | Perform any Technical Service Bulletins that may apply. |
Were there any problems found?
Yes
- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Replace and program the Powertrain Control Module in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Powertrain Control - Removal) .
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).