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. DIAGNOSIS (a) If the skid control ECU (master cylinder solenoid) detects a malfunction, the ABS and/or BRAKE warning lights and the slip indicator lights come on in accordance with the trouble area to warn the driver. HINT: The DTCs are simultaneously stored in th ...

Theft Deterrent System Presence Detection (B279C,B279C95)
DESCRIPTION If an ECM that is incompatible with the engine immobiliser system is installed, the ECM stores this DTC. DTC No. DTC Detection Condition Trouble Area DTC Output Confirmation Operation B279C*1 An ECM that is incom ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT CAMSHAFT TIMING GEAR BOLT (a) Remove the camshaft timing oil control solenoid assembly (See page ). (b) Check that the plunger strokes when the plunger in the center of the camshaft timing gear bolt is pressed. Standard stroke: 4 ...

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