Lexus ES: Fail-safe Chart

Lexus ES (XZ10) Service Manual / Brake / Parking Brake / Electric Parking Brake System (for Hv Model) / Fail-safe Chart

FAIL-SAFE CHART

DTC	Trouble Area	Brake System Warning Light (Yellow)	Parking Brake Indicator Light (Red)	Fail-safe Deactivation Condition
C1245	Deceleration sensor data malfunction	Illuminates	Normal	20 seconds after power switch turned off
C13A0	Open in power supply relay circuit	Illuminates	Normal*	20 seconds after power switch turned off
C13A1	Short in power supply relay circuit	Illuminates	Normal	20 seconds after power switch turned off
C13A2	Power switch malfunction	Illuminates	Normal	20 seconds after power switch turned off
C13A5	Parking brake motor (Parking brake actuator assembly) current monitor malfunction	Illuminates	Normal*	20 seconds after power switch turned off
C13A6	Parking brake motor (Parking brake actuator assembly) open or short malfunction	Illuminates	Normal*	20 seconds after power switch turned off
C13A7	Parking brake actuator assembly malfunction (jamming, spinning, repeated slipping)	Illuminates	Normal*	Parking brake actuator assembly normal
C13A9	Brake Control System Malfunction	Illuminates	Normal	Electronically controlled brake system returns to normal (All of the following conditions are met) A vehicle speed signal is correctly received from 1 or more wheels. No signals indicating an electronically controlled brake system malfunction are received. When the parking brake ECU (brake actuator assembly) is not outputting a parking brake operation request signal, there is no parking brake operation signal from the skid control ECU (brake booster with master cylinder assembly).
C13AA	Electric parking brake high temperature	Does not illuminate	Blinks	Wait 1 minute
C13AE	System information not received malfunction	Illuminates	Normal	System information received
C13B0	ECU malfunction	Illuminates	Normal*	Parking brake ECU (brake actuator assembly) normal
C13B4	Electric parking brake switch open or short circuit malfunction	Illuminates	Blinks	After returning to normal condition, turn power switch again
U0073	CAN communication system malfunction	Illuminates	Normal	Power switch off
U0100	SFI system communication malfunction	Illuminates	Normal	Communication normal, power switch off
U0124	Deceleration sensor communication malfunction	Illuminates	Normal	Communication normal, power switch off
U0129	Brake system communication malfunction	Illuminates	Normal	Communication normal, power switch off
U0293	Hybrid vehicle control ECU communication malfunction	Illuminates	Normal	Communication normal, power switch off

*: The parking brake indicator light blinks (red) if the electric parking brake switch assembly is pulled or pushed.

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Components

COMPONENTS ILLUSTRATION *1 AIR CLEANER CAP WITH AIR CLEANER HOSE *2 COOL AIR INTAKE DUCT SEAL *3 INLET AIR CLEANER ASSEMBLY *4 NO. 1 ENGINE COVER SUB-ASSEMBLY *5 THROTTLE BODY GASKET *6 THROTTLE BODY WITH MOTOR ASSEMBLY *7 NO. 2 VENTILATION HOSE *8 NO. 6 WATER

Check Bus 2 Lines for Short Circuit

DESCRIPTION There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is below 54 Ω. Symptom Trouble Area Resistance between terminals 18 (CA4H) and 17 (

Lexus ES: Fail-safe Chart

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Components

Check Bus 2 Lines for Short Circuit