The GMC Code P1574 is an error code used by the vehicle’s Electronic Brake Control Module (EBCM) or Powertrain Control Module (PCM) to indicate a malfunction in the stoplamp switch circuit. This code is an indication that the stoplamp switch signal has failed to reach the EBCM or the EBCM’s ability to send the stop lamp switch signal to the PCM has failed. Diagnosis of the stoplamp switch signal and the EBCM can be found in the ABS/TCS Diagnostic Trouble Codes (DTCs) P0502, P0503, P0719, P0724, P1575, and P1602. This issue can cause traction control and antilock brake systems to become inactive and non-drive wheel speed to go above 20 mph and then not go back below 20 mph. Understanding the GMC Code P1574 and its causes and solutions is essential for resolving the issue quickly and efficiently.
Causes and Solutions of GMC Code P1574
| Causes | Solutions |
|---|---|
| Stoplamp switch signal failed to reach the EBCM | Check the wiring and connections |
| EBCM’s ability to send the stop lamp switch signal to the PCM has failed | Replace the EBCM |
| ABS/TCS DTC’s not set | Perform diagnosis of the stoplamp switch signal and the EBCM |
| Traction control and antilock brake systems become inactive | Check the wiring and connections |
GMC Code P1574 is an error code that can be found in the Electronic Brake Control Module (EBCM) or Powertrain Control Module (PCM) and is associated with a malfunction in the stoplamp switch circuit. This code can lead to a variety of issues, such as the ABS/TCS DTC’s not being set, traction control and antilock brake systems becoming inactive, and non-drive wheel speed going above 20 mph and not going back below 20 mph. In order to resolve this code and the issues associated with it, it is important to understand the causes and solutions of GMC Code P1574. Knowing the causes and solutions of the GMC Code P1574 can help you to quickly and efficiently diagnose and resolve the issue.
Stoplamp Switch Signal Failed to Reach the EBCM
The first cause of the GMC Code P1574 is that the stoplamp switch signal has failed to reach the EBCM. This can be due to a variety of issues, such as a faulty wiring connection or a broken wire. In order to diagnose this issue, it is important to check the wiring and connections to ensure that they are secure and in good condition. If any problems are found, they should be fixed or replaced in order to resolve the issue.
EBCM’s Ability to Send the Stop Lamp Switch Signal to the PCM Has Failed
The second cause of the GMC Code P1574 is that the EBCM’s ability to send the stop lamp switch signal to the PCM has failed. This can be due to a variety of issues, such as a faulty EBCM or a damaged wiring connection. In order to diagnose this issue, it is important to perform a diagnosis of the EBCM. If any problems are found, the EBCM should be replaced in order to resolve the issue.
ABS/TCS DTC’s Not Set
The third cause of the GMC Code P1574 is that the ABS/TCS DTC’s are not set. This can be due to a variety of issues, such as a faulty wiring connection or a broken wire. In order to diagnose this issue, it is important to check the wiring and connections to ensure that they are secure and in good condition. Additionally, it is important to perform a diagnosis of the stoplamp switch signal and the EBCM in order to properly diagnose the issue.
Traction Control and Antilock Brake Systems Become Inactive
The fourth cause of the GMC Code P1574 is that the traction control and antilock brake systems become inactive. This can be due to a variety of issues, such as a faulty wiring connection or a broken wire. In order to diagnose this issue, it is important to check the wiring and connections to ensure that they are secure and in good condition. If any problems are found, they should be fixed or replaced in order to resolve the issue.
Conclusion
GMC Code P1574 is an error code that can lead to a variety of issues, such as the ABS/TCS DTC’s not being set, traction control and antilock brake systems becoming inactive, and non-drive wheel speed going above 20 mph and not going back below 20 mph. Understanding the causes and solutions of the GMC Code P1574 is essential for resolving the issue quickly and efficiently. Knowing the causes and solutions of GMC Code P1574 can help you to quickly and efficiently diagnose and resolve the issue.
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