Toyota Avalon Service & Repair Manual: Air Bag Circuit (C147D)

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) receives the secondary collision brake control request signal from the airbag ECU assembly.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C147D

Air Bag Circuit

451

An abnormal secondary collision brake control request signal is received 2 times or more when communication with the airbag ECU assembly is possible.

  • Airbag ECU assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Does not come on

Secondary collision brake DTC

HINT:

The DTC is cleared when the conditions return to normal.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

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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

A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

B

INSPECT AIRBAG SYSTEM

    Open Circuit in ABS Solenoid Relay Circuit (C146E,C146F)

    Master Reservoir Level Malfunction (C1202)

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