B2784

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784: Antenna Coil Open / Short

DTC B2784 - Antenna Coil Open / Short

DESCRIPTION

The transponder key coil receives key code signals from the key's transponder chip. The coil is built into the transponder key amplifier, which amplifies the key code signals and outputs the signals to the transponder key ECU.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Immobiliser / Data List.
(e) According to the display on tester, read the "Data List".

Immobiliser:





OK:
"NORMAL" (antenna coil is normal) appears on the screen.
NG -- CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)
OK -- REPLACE TRANSPONDER KEY ECU ASSEMBLY
2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)




(a) Disconnect the D23 transponder key ECU connector.
(b) Disconnect the D24 transponder key amplifier connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:





(d) Reconnect the D23 transponder key ECU connector.
(e) Reconnect the D24 transponder key amplifier connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE TRANSPONDER KEY AMPLIFIER