Open load or short circuit to ground in Tag Axle Brake Pressure Sensor.
â–¶ How to fix
• Check wiring (to pressure sensor). • Check connectors (to pressure sensor). • Check pressure sensor. • Measure the sensor voltage between signal and ground.
What you'll see
No driver-visible symptom recorded.
System reaction
Pressure gauge shows unreliable air tank pressure (as long as the fault is present).
Diagnostic depth
Detection
• Impermissible signal from the pressure sensor. • The sensor voltage level is too low. • The Pressure sensor is short circuit to ground.
Possible cause
• Defect wiring - open circuit on pin B26 (signal) or pin B15 (sensor supply) - short circuit to pin B23 (ground) • Defect connectors • Defect sensor