FAIL-SAFE CHART
FAIL-SAFE OPERATION
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, VSC and brake hold 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 system warning light will come on to warn the driver.
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If it is impossible for control to continue, the warning light comes on to inform the driver of system control termination.
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HINT:
When control is prohibited, the brake hold operated indicator light blinks, and the code for the system where the malfunction occurred during diagnostic mode is displayed by the brake hold standby indicator light.
HINT:
When control is prohibited, a message is displayed on the multi-information display in the combination meter assembly.
Malfunction Area | Control Method |
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ABS system | ABS, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
BA system | ABS, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
EBD system | ABS, EBD, BA, TRAC and VSC control prohibited. Brake hold control prohibited. |
Malfunction Area | Control Method |
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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). |
Malfunction Area | Control Method |
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Airbag system (Secondary collision brake system) | Before control: Disables control. During control: Uses only the brakes to perform control. |
Engine control system (Secondary collision brake system) | Before control: Disables control. During control: Uses only the brakes to perform control. |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Headup Display System: Lost Communication with ECM / PCM "A" (U0100,U0142,U0163,U023A)
DESCRIPTION The headup display (meter mirror sub-assembly) communicates with the ECM, main body ECU (multiplex network body ECU), radio receiver assembly and forward recognition camera via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note U01 ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Front Camera System: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Before performing troubleshooting for the front camera system, perform troubleshooting for the pre-collision system.
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If a pre-collision system related warning message is displayed on the multi-information display, refer to How to Proceed with Troublesh ...