Toyota Tundra (2015 year). Manual — part 2363

OK

OK

(a) Remove the unlock warning switch

.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance:

TESTER CONNECTION SWITCH CONDITION SPECIFIED CONDITION

1 - 2

Switch is pushed

Below 1 Ω

Switch is not pushed

10 kΩ or higher

NG

REPLACE UNLOCK WARNING SWITCH

5.

CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - BODY GROUND)

(a) Disconnect the J18 switch connector.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

J18-2 - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2780; P...

6.

CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - TRANSPONDER
KEY ECU)

(a) Disconnect the J18 switch connector.

(b) Disconnect the J26 ECU connector.

(c) Measure the resistance according to the value(s) in the table

below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED

CONDITION

J26-3 (KSW) - J18-1

Always

Below 1 Ω

J26-3 (KSW) or J18-1 - Body

ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE TRANSPONDER KEY ECU

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2780; P...

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000001TCN03PX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; Antenna Coil Open / Short; 2015 MY

Tundra [08/2014 - ]

DTC

B2784

Antenna Coil Open / Short

DESCRIPTION

The antenna coil receives key code signals from the transponder chip in the key grip. The coil is built into the

transponder key amplifier, which amplifies the key code signals and outputs the signals to the transponder key

ECU.

This DTC is output when there is an open or short malfunction in the antenna coil.

DTC CODE

DTC DETECTION CONDITION

TROUBLE AREA

B2784

Antenna coil is open/shorted

Harness or connector

Transponder key ECU

Transponder key amplifier

WIRING DIAGRAM

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; A...

NEXT

INSPECTION PROCEDURE

HINT:

When the transponder key ECU is replaced, reregister the ECU - ECM communication ID

.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTC

.

2.

CHECK FOR DTC

(a) Check for DTC

.

OK:

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784; A...