P1573-BRAKE PEDAL STUCK OFFFor 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 GROUNDSTOP LAMP SWITCHPCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).Diagnostic Test1.ACTIVE DTCMake sure the Stop Lamp Switch is adjusted properly before continuing.Ignition on, engine not running.With a scan tool, select View DTCs.Is the DTC Active at this time?YesGo To 2NoRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)2.STOP LAMP SWITCH OPERATIONTurn the ignition off.Disconnect the Stop Lamp Switch harness connectors.Measure the resistance between the (Z914) Ground circuit terminal and the (B15) Brake Signal 1 circuit terminal in the Stop Lamp Switch.Apply and release the Stop Lamp Switch while monitoring the ohmmeter.Does the resistance change from below 5.0 ohms to an open circuit when pressing and releasing the brake switch?YesGo To 3NoReplace the Stop Lamp Switch.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)3.STOP LAMP SWITCH OPERATIONMeasure the resistance between the (F941) Fused Ignition Switch circuit terminal and the (B16) Brake Signal 2 circuit terminal in the Stop Lamp Switch.Apply and release the Stop Lamp Switch while monitoring the ohmmeter.Does the resistance change from below 5.0 ohms to an open circuit when pressing and releasing the Stop Lamp switch?YesGo To 4NoReplace the Stop Lamp Switch.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4.(B16) BRAKE SIGNAL 2 CIRCUIT SHORTED TO BATTERY VOLTAGEDisconnect the C3 PCM harness connector.Ignition on, engine not running.Measure the voltage on the (B16) Brake Signal 2 circuit in the Stop Lamp Switch harness connector.Is the voltage above 1.0 volt?YesRepair the short to battery voltage in the (B16) Brake Signal 2 circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 55.(B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUNDTurn the ignition off.Measure the resistance between ground and the (B15) Brake Signal 1 circuit in the Stop Lamp Switch harness connector.Is the resistance below 100 ohms?YesRepair the short to ground in the (B15) Brake Signal 1 circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 66.PCMBefore continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.Were there any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Powertrain Control Module per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)