Toyota Venza: Fail-safe Chart
FAIL-SAFE CHART
1. FAIL-SAFE OPERATION
- 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 VSC system malfunction.
The brake actuator assembly turns off each solenoid and the ECM shuts off VSC control (traction control signal) from the skid control ECU accordingly, which turns out to be as if the ABS, TRAC and VSC systems were not installed.
The ABS control will be prohibited, but EBD control will continue as much as possible. If EBD control is impossible, the brake warning light will come on to warn the driver (See page
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).
- If system components have any malfunction before starting control, immediately
stop the operation. If system components have any malfunction 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 termination of the systems (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 |
HINT:
A malfunction in either the ABS or BA system will result in an identical operation, with ABS, BA, TRAC and VSC system control prohibited.
TRAC and VSC System|
Malfunction Area |
Control Method |
|---|---|
|
Engine control system (TRAC and VSC systems) |
Before control: Disables control During control: Uses only the brakes to effect control |
|
Brake control system (VSC system) |
Before control: Disables control During control: Uses only the engine to effect control |
|
Brake control system (TRAC system) |
Before control: Disables control During control: Disables control (by gradually ending control) |
HINT:
As for the TRAC and VSC systems, different systems prohibit different controls depending on a malfunctioning part.
Freeze Frame Data
FREEZE FRAME DATA
1. FREEZE FRAME DATA
(a) Whenever an ABS DTC is detected, the skid control ECU stores the current
vehicle (sensor) state as Freeze Frame Data.
(b) The skid control ECU stores th ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any p ...
Other materials about Toyota Venza:
Definition Of Terms
DEFINITION OF TERMS
Term
Definition
Monitor Description
Description of what the ECM monitors and how it detects malfunctions
(monitoring purpose and details).
Related DTCs
Group ...
Relay
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT STARTER RELAY
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
...
Screen Flicker or Color Distortion
PROCEDURE
1.
CHECK DISPLAY SETTING
(a) Reset display settings (contrast, brightness) and check that the screen appears
normal.
OK:
The display returns to normal.
OK
END
NG
...
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