Input voltage to current measurement sensor (trailer ABS) is too low.
â–¶ How to fix
• Check the trailer ABS fuse • Check connectors and wiring for defects • Measure the voltage between pin C36 and ground (with ignition on). Should equal battery voltage.
What you'll see
No driver-visible symptom recorded.
System reaction
• The COO will not be able to detect a trailer ABS. • The trailer ABS might not function.
Diagnostic depth
Detection
Faulty trailer ABS supply. The supply voltage, on the input side of the current sensor, is below the operational limit for current measurement.
Possible cause
• The fuse to trailer ABS supply (current sensor) has blown • Open circuit in wiring • Faulty connectors