Engine Immobiliser System (w/o Smart Key System)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): B2784: Antenna Coil Open / Short

DTC B2784 - Antenna Coil Open / Short

DESCRIPTION

The transponder key coil is built into the transponder key amplifier and receives a key code signal from the transponder chip in the key. This signal is amplified by the amplifier, then it is output to the transponder key ECU assembly.





WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: If the transponder key ECU assembly is replaced, register the key and ECU communication ID Engine Immobiliser System (W/O Smart Key System).

PROCEDURE

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

Immobiliser (Transponder Key ECU Assembly)





OK:
On the Techstream screen, the item displays Normal according to the chart above.

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 transponder key ECU assembly connector.




(b) Disconnect the transponder key amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT TRANSPONDER KEY AMPLIFIER (POWER SOURCE AND GROUND)
(a) Reconnect the transponder key ECU assembly connector.




(b) Reconnect the transponder key amplifier connector.
(c) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:





Standard Resistance:





Text in Illustration





NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY
OK -- REPLACE TRANSPONDER KEY AMPLIFIER