Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Airbag ECU Malfunction1 (B1160-B1167)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System(for Gasoline Model) / 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

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

REPLACE AIRBAG ECU ASSEMBLY

GO TO DIAGNOSTIC TROUBLE CODE CHART

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

Front Airbag Sensor (RH) (B1610)

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Ignition Circuit
DESCRIPTION A direct ignition system is used on this vehicle. The direct ignition system is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, one spark plug is connected to the end of the secondary winding. High voltage is generated in ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Airbag ECU Malfunction1 (B1160-B1167)

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

Front Airbag Sensor (RH) (B1610)

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual