Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 U Doc ID: RM000001DX004EX
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): FAIL-SAFE
CHART; 2016 MY Tacoma [08/2015 - ]
FAIL-SAFE CHART
1. FAIL SAFE OPERATION
If there is a problem with any sensor signals or hydraulic brake booster systems, the skid control ECU
prohibits the power supply to the actuator in the hydraulic brake booster and informs the ECM of VSC
system failure.
The hydraulic brake booster turns off each solenoid and the ECM shuts off the VSC control
(traction control signal) from the skid control ECU accordingly, which turns out to be as if the
ABS, TRAC, A-TRAC and VSC systems were not installed.
The ABS control is prohibited, but EBD control continues as far as possible. If EBD control is
impossible, the BRAKE warning light comes on to warn the driver .
If system components have any malfunctions before starting control, immediately stop the operation.
If system components have any malfunctions during control, gradually stop the control so as not
to trigger a sudden change in vehicle conditions.
If it is impossible to control the systems, the warning light comes on to inform the driver of the
termination of the systems .
VSC control continues as much as possible while the TRAC OFF indicator light is on even when the
engine has failed.
HINT:
If the hydraulic brake booster encounters a malfunction, brake performance is gradually lost and ABS, BA,
TRAC, A-TRAC, VSC, AUTO LSD, hill-start assist control, Crawl Control and multi-terrain select controls are
prohibited.
(a) ABS, EBD and BA system:
HINT:
If the ABS, BA or EBD system malfunctions, the following controls are prohibited as shown in the table
below.
MALFUNCTION
AREA
CONTROL METHOD
ABS system
ABS, BA, TRAC, A-TRAC, VSC, AUTO LSD control, hill-start assist, CRAWL and multi-terrain
select control are prohibited.
BA system
ABS, BA, TRAC, A-TRAC, VSC, AUTO LSD control, hill-start assist, CRAWL and multi-terrain
select control are prohibited.
EBD system
ABS, BA, EBD, TRAC, A-TRAC, VSC, AUTO LSD control, hill-start assist, CRAWL and multi-
terrain select control are prohibited.
(b) TRAC, A-TRAC, VSC, AUTO LSD, hill-start assist control and CRAWL system:
HINT:
I
f TRAC, A-TRAC, VSC, AUTO LSD, hill-start assist control and/or CRAWL malfunction, the following controls
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