Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Airbag ECU (Microcomputer) Internal Electronic Failure (B116049,...,P05BB00)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Airbag ECU (Microcomputer) Internal Electronic Failure (B116049,...,P05BB00)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B116049

Airbag ECU (Microcomputer) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B11609E

Airbag ECU (Microcomputer) Stuck On

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116149

Airbag ECU (Main ASIC) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B11619E

Airbag ECU (Main ASIC) Stuck On

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116311

Airbag ECU (IC and Device) Circuit Short to Ground

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116349

Airbag ECU (IC and Device) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B11639E

Airbag ECU (IC and Device) Stuck On

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B11639F

Airbag ECU (IC and Device) Stuck Off

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116449

Airbag ECU (G Sensor 1) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116483

Airbag ECU (G Sensor 1) Value of Signal Protection Calculation Incorrect

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116484

Airbag ECU (G Sensor 1) Signal Below Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116485

Airbag ECU (G Sensor 1) Signal Above Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116549

Airbag ECU (G Sensor 2) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116583

Airbag ECU (G Sensor 2) Value of Signal Protection Calculation Incorrect

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116584

Airbag ECU (G Sensor 2) Signal Below Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116585

Airbag ECU (G Sensor 2) Signal Above Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116649

Airbag ECU (G Sensor 3) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116683

Airbag ECU (G Sensor 3) Value of Signal Protection Calculation Incorrect

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116684

Airbag ECU (G Sensor 3) Signal Below Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116685

Airbag ECU (G Sensor 3) Signal Above Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116749

Airbag ECU (Roll Sensor) Internal Electronic Failure

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116783

Airbag ECU (Roll Sensor) Value of Signal Protection Calculation Incorrect

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116784

Airbag ECU (Roll Sensor) Signal Below Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116785

Airbag ECU (Roll Sensor) Signal Above Allowable Range

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

B116800

Airbag ECU Failure (Write Inhibit of EDR)

Airbag ECU assembly malfunction

Airbag ECU assembly

Comes on

Does not apply to test/check mode

P05BB00

Restraints Deployed

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 B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 and P05BB00 are also output, troubleshoot those DTCs first.

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch to ON, and wait for at least 60 seconds.

(b) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

Only B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 or P05BB00 is output

A

B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 or P05BB00 and other DTCs are output

B

B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 and P05BB00 are not output

C

NOTICE:

If only DTC B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 or P05BB00 is output, do not clear the DTCs, replace the airbag ECU assembly.

HINT:

If any DTCs other than DTC B116049, B11609E, B116149, B11619E, B116349, B11639E, B11639F, B116449, B116483, B116484, B116485, B116549, B116583, B116584, B116585, B116649, B116683, B116684, B116685, B116749, B116783, B116784, B116785, B116800, B116900 or P05BB00 are also output, troubleshoot those DTCs first.

A

REPLACE AIRBAG ECU ASSEMBLY

B

GO TO DIAGNOSTIC TROUBLE CODE CHART
C

USE SIMULATION METHOD TO CHECK

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