Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJLN
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): B2784; Antenna Coil Open / Short; 2016 MY Sienna [12/2015 - 08/2016]

DTC

B2784

Antenna Coil Open / Short

DESCRIPTION

This DTC is stored when there is an open or short in the transponder key coil (built into the engine switch).

DTC No.

DTC Detection Condition

Trouble Area

B2784

Transponder key coil is open or shorted.

  • Certification ECU
  • Engine switch

CAUTION / NOTICE / HINT

NOTICE:

If the certification ECU is replaced, register the key (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION ).

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): DTC CHECK / CLEAR ).

(b) Recheck for DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): DTC CHECK / CLEAR ).

OK:

DTC B2784 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

REPLACE ENGINE SWITCH

(a) Replace the engine switch (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE STARTING: ENGINE SWITCH: REMOVAL ).

NEXT

3.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): DTC CHECK / CLEAR ).

(b) Recheck for DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): DTC CHECK / CLEAR ).

OK:

DTC B2784 is not output.

OK

END (ENGINE SWITCH WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU