P1573-BRAKE PEDAL STUCK OFF





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on, In plant mode passed the Applied test.

  • Set Condition:

    PCM recognizes the Brake Pedal could not electronically indicate the released (Off) position with both switches. If P1572 sets, P1573 will also set. One trip fault.


Possible Causes
  
(B16) BRAKE SIGNAL 2 CIRCUIT SHORTED TO BATTERY VOLTAGE
  
(B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUND
  
STOP LAMP SWITCH
  
PCM
  

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).



Diagnostic Test

1.ACTIVE DTC

NOTE: Make sure the Stop Lamp Switch is adjusted properly before continuing.





Is the DTC Active at this time?

Yes
  • Go To 2


No

2.STOP LAMP SWITCH OPERATION






Does the resistance change from below 5.0 ohms to an open circuit when pressing and releasing the brake switch?

Yes
  • Go To 3


No

3.STOP LAMP SWITCH OPERATION




Does the resistance change from below 5.0 ohms to an open circuit when pressing and releasing the Stop Lamp switch?

Yes
  • Go To 4


No

4.(B16) BRAKE SIGNAL 2 CIRCUIT SHORTED TO BATTERY VOLTAGE







Is the voltage above 1.0 volt?

Yes


No
  • Go To 5

5.(B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUND






Is the resistance below 100 ohms?

Yes


No
  • Go To 6

6.PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.




Were there any problems found?

Yes


No