2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) B CODE Page 260

NG -- REPLACE SMART KEY ECU ASSEMBLY See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Alarm

Module/Service and Repair/Removal

OK -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY See: Accessories and Optional Equipment/Navigation

System/Service and Repair/Navigation Receiver (for HDD)/Removal

Up to 08/2009

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function): B27A1:

Open in Driver Side Electrical Antenna Circuit

B27A1 - Open in Driver Side Electrical Antenna Circuit

DESCRIPTION

The certification ECU (smart key ECU assembly) generates a request signal and sends it to the electrical key oscillator built into the front door

outside handle assembly (for driver side) at 0.25-second intervals. To detect a key near the driver door, the front door outside handle assembly (for

driver side) creates a detection area with a radius of approximately 1.0 m (3.28 ft.) from the driver door at 0.25-second intervals.

DTC B27A1 is detected by the certification ECU (smart key ECU assembly) if an open circuit is detected between the certification ECU (smart key

ECU assembly) and front door outside handle assembly (for driver side) terminals (between CLG1 and ANT1, or CG1B and ANT2).

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

The smart access system with push-button start (for entry function) uses a multiplex communication system (LIN communication

system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting

See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Initial Inspection and Diagnostic

Overview/Smart Access System With Push-Button Start (for Entry Function)/How To Proceed With Troubleshooting.

Troubleshoot the smart access system with push-button start (for entry function) after confirming that the communication system

is functioning properly.

PROCEDURE

1. CHECK CONNECTOR (CONNECTOR CONNECTION CONDITION)

(a) Turn the engine switch off.

(b) Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and the front door outside handle

assembly (for driver side).

OK:

Connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY

OK -- Continue to next step.