TBM Message Center Messages

The TBM continually monitors the trailer brake system operation and trailer connectivity. The TBM sends system operation information such as gain setting and relative braking power to other modules over the HS-CAN2. If a system fault or a trailer connectivity issue is detected, the TBM sends a message to the GWM along the HS-CAN2. The GWM sends this message to the IPC along the HS-CAN3. When the IPC receives a trailer brake message from the GWM, one or more of the following messages is displayed in the message center:

• TRAILER BRAKE GAIN = XX.X NO TRAILER  - Shows the current gain setting for the current ignition cycle and when adjusting the gain. This message also displays if the manual slider switch or gain buttons are used without a trailer connected.
• TRAILER BRAKE MODULE FAULT  - Displays in response to Diagnostic Trouble Codes (DTCs) reported by the TBM, accompanied by a single audible chime. When this message appears, the system may still function, but performance may be degraded.
• TRAILER CONNECTED  - Displays when the TBM detects a correct trailer wiring connection (a trailer with electric trailer brakes) during the current ignition cycle.
• TRAILER DISCONNECTED  - Displays when the TBM detects a trailer connection and then a disconnection, either intentional or unintentional, during the current ignition cycle, the display is accompanied by a single audible chime. This message also displays if a vehicle or trailer-wiring fault occurs causing the trailer to appear disconnected, or if the manual slider switch is activated without a trailer connected.
• TRAILER WIRING FAULT  - Displays when there is a short circuit on the TBM PWM output signal circuit. If the message is displayed and accompanied by a single audible chime, without a trailer connected, the concern is in the vehicle wiring. If the message only displays with a trailer connected, the concern is in the trailer wiring.