B11BA MERCURY - Steering Wheel Audio Switch Pack
B11BA MERCURY Possible Causes
- Faulty Steering Wheel Audio Switch Pack
- Steering Wheel Audio Switch Pack harness is open or shorted
- Steering Wheel Audio Switch Pack circuit poor electrical connection
- Faulty Audio Control Module (ACM) or Accessory Protocol Interface Module (APIM)
B11BA MERCURY Tech Notes
B11BA:1C - Steering Wheel Audio Switch Pack Circuit Voltage Out of Range
B11BA:63 - Steering Wheel Audio Switch Pack Circuit/Component Protection Time-Out
Cost of diagnosing the B11BA MERCURY code
The cost of diagnosing the B11BA MERCURY code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B11BA MERCURY Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B11BA MERCURY Meaning
Voltage 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 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.