B1117 - FAULT CODE - OBD2

B1117 FORD, LINCOLN, MERCURY: AUDIO STEERING WHEEL BUTTON STUCK

The steering wheel switch options depend on whether or not the vehicle is fitted with the SYNC System. When it is not included, all steering wheel control switches are connected to the ACM (Audio Control Module) and these controls include VOL +, VOL-, SEEK +, SEEK-, and MEDIA, where SEEK + and SEEK- are shown as arrows.

In vehicles with the SYNC System, the steering wheel controls are: VOL +, VOL-, SEEK +, SEEK-, MEDIA, VOICE, PHONE, and OK, and in these cases SEEK + and SEEK- are indicated through arrows, VOICE is also shown as an icon of someone talking and the PHONE button is depicted by a phone icon that has arrows pointing up and down. The VOICE, PHONE, and OK switches are connected to the APIM (Accessory Protocol Interface Module) and the remaining switches to the Audio Control Module

For all switches, a reference voltage is sent from the corresponding module and when a switch is pushed the voltage is routed from a specific resistance value for each function, the module provides ground for the reference voltage, which is used to determine which control input function is selected.

B1117 OBDII fault code is set when a malfunction is detected in the audio steering wheel button due to it being stuck.

• Check Enigine light comes on.

The reasons why the B1117 OBD2 diagnostic code is stored are:

• Audio steering wheel switch wires may be in poor condition.
• Electrical connections related to the audio steering wheel switch circuit may be faulty.
• The audio steering wheel switch may be defective.