PINPOINT TEST B : P0504, P0572, P0573 OR P1703
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
B1 CHECK THE OPERATION OF THE STOPLAMPS
Ignition ON. Operate the stoplamps.
Do the stoplamps and high mounted stoplamp operate correctly?
Yes | GO to B2 |
|---|---|
No | REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing). |
B2 CHECK THE STOPLAMP SWITCH (BOO1) AND CRUISE CONTROL DEACTIVATOR SWITCH (BOO2) PARAMETER IDENTIFICATIONS (PIDS)
Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs). Using the table, monitor the Parameter Identifications (PIDs) BOO1 (stoplamp switch) and BOO2 (cruise control deactivator switch) while applying and releasing the brake pedal.
Brake Pedal Position | BOO1 PID | BOO2 PID |
|---|---|---|
Released | Off | Off |
Applied lightly | On | Off |
Applied firmly | On | On |
Do the PID values agree with the brake pedal position?
Yes | GO to B8 |
|---|---|
No | For an incorrect BOO1 PID value, GO to B3 For an incorrect BOO2 PID value, GO to B4 |
B3 CHECK THE STOPLAMP SWITCH CIRCUIT
Ignition OFF. Disconnect: PCM C1551B (2.3L), C1381B (3.7L) or C175B (5.0L). Ignition ON. While applying and releasing the brake pedal, measure:
Click to display connectors
2.3L
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C1551B-66 | Ground |
Click to display connectors
3.7L
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.