Last Modified: 11-13-2015 6.6 D Doc ID: RM000005V9S000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): DIAGNOSIS
SYSTEM; 2016 MY Tacoma [08/2015 - ]
When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting
procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle's skid
control ECU (brake actuator assembly).
The skid control ECU (brake actuator assembly) records DTCs when the ECU detects a malfunction in the ECU
itself or in its circuits.
To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables you to clear the
DTCs, activate the various actuators, and check the Freeze Frame Data and Data List.
(a) Check the battery voltage.
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding to the next step.
(b) Check the DLC3 .
(a) If the skid control ECU (brake actuator assembly) detects a malfunction, the ABS warning, brake warning
and/or slip indicator lights will come on in order to warn the driver.
(b) The DTCs are simultaneously stored in memory. The DTCs can be read by connecting SST between
terminals TC and CG of the DLC3 and observing the blinking pattern of the ABS warning and slip indicator
lights, or by connecting the Techstream .
(c) This system has a Test Mode (signal check) function .
3. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK
(a) When the ignition switch is turned to ON, check that the ABS warning, brake warning, and slip indicator
lights come on for approximately 3 seconds.
When the brake fluid level is low, the brake warning light comes on.
If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits
TROUBLE AREA SEE PROCEDURE
ABS warning light circuit (Remains on)
ABS warning light circuit (Does not come on)
Brake warning light circuit (Remains on)
Brake warning light circuit (Does not come on)
Slip indicator light circuit (Remains on)