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
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). - 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
).
|
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 |
|
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:
Dtc Check / Clear
DTC CHECK / CLEAR
NOTICE:
When the diagnosis system is changed from normal mode to check mode or vice versa,
all DTCs and freeze frame data recorded in normal mode are cleared. Before changing
modes, always check and make a note of DTCs and freeze frame data.
HINT:
DTCs which are sto ...
Lubrication System
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT ENGINE OIL LEVEL
(a) Warm up the engine, and then stop the engine and wait for 5 minutes.
(b) Check that the engine oil level is between the low level and full level marks
on the dipstick.
If low, check for leakage and add en ...
Cruise Main Indicator Light Circuit
DESCRIPTION
When the dynamic radar cruise control system is turned on using the cruise control
main switch (ON-OFF button), the cruise control indicator (vehicle-to-vehicle distance
control mode) illuminates. The ECM uses this and other indicators to indicate the
control condition (presence o ...
