Contents

			Test results
1	COMPONENT CONCERNED	POWERTRAIN CONTROL MODULE AND BRAKE PEDAL SWITCH CONNECTION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Connections on brake pedal switch and Powertrain Control Module	Check for the presence of loose connections on the brake pedal switch and the Powertrain Control Module	Go to Step 2	Presence of loose connections	Restore the correct connections
2	COMPONENT CONCERNED	WIRING CHECK BETWEEN BRAKE PEDAL SWITCH AND POWERTRAIN CONTROL MODULE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Wiring between brake pedal switch and Powertrain Control Module	Check the correct continuity of the wiring between pin 48 of the Powertrain Control Module and the brake pedal switch, with the pedal released	Go to Step 3	Faults in the continuity of the wiring	Restore the correct wiring
3	COMPONENT CONCERNED	WIRING CHECK BETWEEN BRAKE PEDAL SWITCH AND POWERTRAIN CONTROL MODULE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Wiring between brake pedal switch and Powertrain Control Module	Check for the presence of a short circuit to battery on the wiring between pin 48 of the Powertrain Control Module and the brake pedal switch, with the pedal released	Go to Step 4	Presence of a short circuit to battery on the wiring	Restore the correct wiring insulation to battery
4	COMPONENT CONCERNED	WIRING CHECK BETWEEN BRAKE PEDAL SWITCH AND POWERTRAIN CONTROL MODULE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Wiring between brake pedal switch and Powertrain Control Module	Check for the presence of a short circuit to earth on the wiring between pin 48 of the Powertrain Control Module and the brake pedal switch, with the pedal released	Go to Step 5	Presence of a short circuit to earth on the wiring	Restore the correct wiring insulation to earth
5	COMPONENT CONCERNED	BRAKE PEDAL SWITCH POSITION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Brake pedal switch	Check that the brake pedal switch is in the correct position	Go to Step 6	Brake pedal switch is in the wrong position	Restore the brake pedal switch to the correct position
6	COMPONENT CONCERNED	BRAKE PEDAL SWITCH OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Brake pedal switch	Check that the brake pedal is working properly See Test 5550DA BRAKE PEDAL SWITCH OPERATION CHECK	End of diagnosis	Brake pedal switch is not working correctly	Replace the brake pedal switch Op. 5550D10 BRAKE LIGHT SWITCH - R+R