AB Unable To Detect Brake Press. Diff. Warning Lamp Activation

Unable to Detect Brake Pressure Differential Valve Warning Lamp Switch Activation

PINPOINT TEST AB: UNABLE TO DETECT BRAKE PRESSURE DIFFERENTIAL VALVE WARNING LAMP SWITCH ACTIVATION:

The Control Module has not received the signal that the vehicle's brake pedal was pressed hard after STAR Tester displayed a DTC 12 or 13. There are four possible causes which are listed below.
1. Brake pedal was not pressed hard at the proper time.
2. Brake pressure differential valve warning lamp switch circuit may have an open or short.
3. Brake pressure differential valve warning lamp switch may be inoperative.
4. Control Module may be inoperative.