Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Fail-safe Chart

FAIL-SAFE CHART

  • If there is a problem with sensor signals or actuator systems, the skid control ECU prohibits power supply to the brake actuator assembly and informs the ECM of a VSC system malfunction.

    The brake actuator assembly turns off the solenoids and the ECM stops its VSC control according to signals from the skid control ECU. The vehicle will operate in a manner similar to a vehicle that is not equipped with ABS, TRAC and VSC systems.

    ABS control will be prohibited, but EBD control will continue to the extent that EBD control is possible. If EBD control is impossible, the brake warning light will come on to warn the driver (See page ).

  • If a VSC system component malfunctions before VSC control begins, VSC control will be prohibited.

    If a system component malfunctions during VSC control, the system will gradually stop performing control so as not to trigger a sudden change in vehicle operation.

    If it is impossible for control to continue, the warning light comes on to inform the driver of system control termination (See page ).

ABS, EBD and BA Systems

Malfunction Area

Control Method

ABS system

ABS, BA, TRAC and VSC control prohibited

BA system

ABS, BA, TRAC and VSC control prohibited

EBD system

ABS, EBD, BA, TRAC and VSC control prohibited

TRAC and VSC Systems

Malfunction Area

Control Method

Engine control system

(TRAC system)

Before control: Disables control

During control: Uses only the brakes to perform control

Brake control system

(VSC system)

Before control: Disables control

During control: Uses only the engine to perform control

Brake control system

(TRAC system)

Before control: Disables control

During control: Disables control (by gradually ending control)

Dtc Check / Clear
DTC CHECK / CLEAR 1. DTC CHECK/CLEAR (When Using Techstream) (a) Check the DTC. (1) Turn the ignition switch off. (2) Connect the Techstream to the DLC3. (3) Turn the ignition switch to ON. (4) ...

Freeze Frame Data
FREEZE FRAME DATA 1. FREEZE FRAME DATA (a) Using the Techstream, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output. 2. CHECK FREEZE FRAME DATA WHEN BRAKE ...

Other materials:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair it. 2. CHECK DLC3 (a) Check ...

Central Gateway ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Central Gateway ECU Communication Stop Mode Communication system DTCs (DTCs that start with U) that correspond to "Central Gateway ECU Communication Stop Mode" in "DTC Com ...

Taillight Relay Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body EC ...

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