Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Air Bag Circuit (C147D)

DESCRIPTION

The skid control ECU (brake actuator assembly) receives the secondary collision brake control request signal from the airbag sensor assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C147D	Air Bag Circuit	An abnormal secondary collision brake control request signal is received 3 times or more when communication with the airbag sensor assembly is possible.	Airbag sensor assembly Skid control ECU (brake actuator assembly)

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

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PROCEDURE

1.	CHECK DTC (AIRBAG SYSTEM)

(a) Check if airbag system DTCs are output.

Body Electrical > SRS Airbag > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

REPLACE BRAKE ACTUATOR ASSEMBLY

GO TO DIAGNOSTIC TROUBLE CODE CHART (AIRBAG SYSTEM)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Electronically Controlled Brake System(for Gasoline Model): Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the skid control ECU (brake actuator assembly). The skid control ECU (bra ...

Toyota Avalon (XX50) 2019-2022 Owners Manual