DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and sends it to the outside electrical key oscillator (for rear side). To
detect the key near the driver door, the outside electrical key oscillator (for rear side) creates a detection area towards the area approximately 1.0 m
(3.28 ft.) from the back door.
DTC B27A8 is detected by the certification ECU (smart key ECU assembly) when an open circuit occurs between the certification ECU (smart key
ECU assembly) and outside electrical key oscillator (for rear side) terminals (between CLG8 and CLG5, or CG8B and CLGB).
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 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 outside electrical key
oscillator (for rear side).
OK:
Connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - OUTSIDE ELECTRICAL KEY OSCILLATOR)
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Disconnect the outside electrical key oscillator (for rear side) connector.
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