B1201 FORD - Steering Wheel Audio Switch Pack 2
- Faulty Steering Wheel Audio Switch Pack 2
- Steering Wheel Audio Switch Pack 2 harness is open or shorted
- Steering Wheel Audio Switch Pack 2 circuit poor electrical connection
- Faulty Audio Control Module (ACM) or Accessory Protocol Interface Module (APIM)
Tech notesB1201:1C - Steering Wheel Audio Switch Pack 2 Circuit Voltage Out of Range
B1201:63 - Steering Wheel Audio Switch Pack 2 Circuit/Component Protection Time-Out
- Engine Light ON (or Service Engine Soon Warning Light)
B1201 Ford DescriptionVoltage is sent from the Audio Control Module (ACM) or Accessory Protocol Interface Module (APIM) to the steering wheel controls, and the same module grounds the return circuit. The VOL-, VOL+, SEEK- and SEEK+ switches share signal and return circuits, while the VOICE, MEDIA, PHONE and OK switches share separate signal and return circuits. For all configurations, when a switch is pressed, the voltage is routed through a specific resistor value for each function. The ACM (or APIM) then uses the reference voltage to determine which control input function has been selected. The OBDII code is set by the navigation ACM when the reference voltage to the steering wheel controls is out-of-range. This can be caused by a number of different failures on the steering wheel controls circuit except for a stuck switch or a short to ground in the signal return circuit.
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