Summary of functions The trailer brakes can be controlled by the Trailer brake controller via the 7-pin connector. By selecting the type of brakes that are being used on the trailer (electric or electric-over-hydraulic) and setting the gain for the controller, the manual TRAILER BRAKE OUTPUT slider is used to slow just the trailer. The vehicle brake pedal will also slow down as well as stop the trailer when applied, also via the same connector. Gain values, manual brake outputs, trailer brake types, and the trailer connection status are displayed in the multi-information display.
Changing settings of the trailer brake type The trailer brake type can be selected on the multi-information display as following: 1. Press "" or "" of meter control switches and select . 2. Press "" or "" of meter control switches and select "Vehicle Settings", and press . 3. Press "" or "" of meter control switches and select "TBC Trailer Type", and press to select the correct type of trailer brakes that are equipped on the trailer. Changing trailer brake type will cause the current gain setting to reset to zero. Make sure to set the gain as described in the following section. Setting the Gain Gain setting on trailer brake controller should be set for a specific towing condition. Gain setting should be adjusted each time the vehicle load, trailer load, road conditions, or weather changes. Setting the gain value to 0 will disable the trailer brake controller output. 1. Make sure the trailer brakes are in good working condition and functioning normally. See trailer dealer if necessary. 2. Hook up the trailer and make proper electrical connections. 3. Select the correct type of trailer brakes that are equipped on the trailer by using the multi-information display. 4. Drive vehicle with trailer attached on a level road surface similar to towing condition and in traffic-free environment. Driving speed should be approximately 20 - 25 mph [35 - 40 km/h]. 5. Using the GAIN (+/-) selection buttons, set a starting gain of 5.0. 6. While driving 20 - 25 mph [35 - 40 km/h], fully apply the manual TRAILER BRAKE OUTPUT slider. 7. Adjust the gain setting, using the GAIN (+/-) selection buttons, to either increase or decrease to just below the point of trailer wheel lock-up. 8. For confirmation, repeat steps 6 and 7 until desired gain setting is reached (just below point of trailer wheel lock-up). ■When using the trailer brake control system Please turn off the intuitive parking assist while towing a trailer. If left on, sonar sensors will detect the trailer being towed. ■When setting the gain Wheel lock-up occurs when the trailer wheel squeals or tire smoke occurs. Trailer wheels may not lock-up while driving heavily loaded trailer. During this case, adjust the Trailer gain to the highest allowable setting for the towing condition. ■When disconnecting and reconnecting battery terminals The gain setting data will be reset.
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Toyota Tundra Service Manual > Cruise Control System: Parts Location
PARTS LOCATION ILLUSTRATION *1 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) *2 PARK/NEUTRAL POSITION SWITCH ASSEMBLY *3 THROTTLE BODY WITH MOTOR ASSEMBLY *4 ECM *5 FRONT SPEED SENSOR RH *6 FRONT SPEED SENSOR LH *7 REAR SPEED SENSOR RH *8 REAR SPEED SENSOR LH *9 ENGINE ROOM RELAY BLOCK ASSEMBLY, JUNCTI ...