Toyota Camry (XV70): Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE CHART
(a) When the skid control ECU (brake actuator assembly) detects a solenoid valve malfunction or abnormal signal from a sensor, the brake actuator assembly cuts power and sends a signal indicating a malfunction of the vehicle stability control system to the ECM.
HINT:
Based on signals sent from the skid control ECU (brake actuator assembly), the brake actuator assembly prevents the solenoids from operating, and the ECM no longer accepts fuel-cut request signals from vehicle stability control system.
(b) If a malfunction of ABS, brake assist, TRAC or VSC is detected, operation of the function is prohibited and the related warning lights illuminate.
The EBD function can still operate even if operation of the ABS function is prohibited. However, if the EBD function is also affected, operation of the EBD system will be prohibited and the brake system warning light (red indicator) illuminates.
HINT:
When a component of the vehicle stability control system is in fail-safe mode, operation is prohibited. However, if the system enters fail-safe mode while braking is being controlled, control is gradually suspended to prevent sudden changes in vehicle behavior.
(c) If a malfunction in the vehicle stability control system or electric parking brake system is detected, control by the brake hold function is prohibited to prevent undesired operation and to protect the system.
HINT:
When control by the brake hold system is prohibited, the brake hold switch (electric parking brake switch assembly) is ON and the following conditions are met, the brake hold indicator will blink.
- Vehicle conditions:
- The driver door is closed.
- The driver seat belt is fastened.
(d) If the skid control ECU (brake actuator assembly) detects a malfunction in the SRS system, secondary collision brake control is prohibited to prevent undesired operation and to protect the system.
HINT:
When control is prohibited, a message is displayed on the multi-information display in the combination meter assembly.
ABS, EBD and BA System|
Item | Operation |
|---|---|
|
Malfunction in the ABS. | ABS, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
|
Malfunction in the BA system. | ABS, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
|
Malfunction in the EBD system. | ABS, EBD, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
|
Item | Operation |
|---|---|
|
Malfunction in the engine control system (TRAC and VSC systems). |
Before control: Disables control. During control: Uses only the brakes to perform control. |
|
Malfunction in the brake control system (VSC system). |
Before control: Disables control. During control: Uses only the engine to perform control. |
|
Malfunction in the brake control system (TRAC system). |
Before control: Disables control. During control: Disables control (by gradually ending control). |
|
Item | Operation |
|---|---|
|
Malfunction in the airbag system (secondary collision brake system). |
Before control: Disables control. During control: Uses only the brakes to perform control. |
|
Malfunction in the engine control system (secondary collision brake system). |
Before control: Disables control. During control: Uses only the brakes to perform control. |
READ NEXT:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Vehicle Stability Control System
DTC No. Detection Item
Link C00631C
Yaw Rate Sensor Circuit Voltage Out of Range
C00631F Yaw Ra
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB) DESCRIPTION
Vehicle Control History (RoB) is a function that captures and stores ECU data when triggered by specific vehicle behavior.
It may be possible to det
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT PROPELLER WITH CENTER BEARING SHAFT ASSEMBLY
(a) Using a dial indicator, measure the runout of the rear propeller shaft assembly (for front side).
Maximum Runout: 0.6 mm (0.0236 in.) NOTICE: The dial indicator must be set at a right angle to the center of th
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. OPERATION CHECK (a) Slide the clip and disconnect the union to check valve hose from the vacuum pump assembly.
(b) Connect the hose of the vacuum gauge to the vacuum pump assembly.
*a Vacuum Gauge
*b Plug
