Toyota Avalon Service & Repair Manual: Airbag ECU Malfunction1 (B1160-B1167)

DESCRIPTION

The airbag ECU assembly consists of the acceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc.

If the airbag ECU assembly receives signals from the acceleration sensor and pressure sensor, it determines whether the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the airbag ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B1160

Airbag ECU Malfunction1

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1161

Airbag ECU Malfunction2

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1162

Airbag ECU Malfunction3

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1163

Airbag ECU Malfunction4

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1164

Airbag ECU Malfunction5

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1165

Airbag ECU Malfunction6

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1166

Airbag ECU Malfunction7

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B1167

Airbag ECU Malfunction8

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

CAUTION / NOTICE / HINT

HINT:

If any DTCs other than B1160, B1161, B1162, B1163, B1164, B1165, B1166 and B1167 are also output, troubleshoot those DTCs first.

PROCEDURE

1.

CHECK DTC

(a) Turn the engine switch on (IG), and wait for at least 60 seconds.

(b) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

NOTICE:

If only DTC B1160, B1161, B1162, B1163, B1164, B1165, B1166 or B1167 is output, do not clear the DTC, replace the airbag ECU assembly.

Result

Proceed to

Only DTC B1160, B1161, B1162, B1163, B1164, B1165, B1166 or B1167 is output

A

DTC B1160, B1161, B1162, B1163, B1164, B1165, B1166 or B1167 and other DTCs are output

B

A

REPLACE AIRBAG ECU ASSEMBLY

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

    Lost Communication with Front Door Pressure Sensor LH (B167B,B167C)

    Front Airbag Sensor (RH) (B1610)

    See More:

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