OK -- Continue to next step.
3. REPLACE DOOR CONTROL RECEIVER
(a) Temporarily replace the door control receiver with a new one See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Keyless Entry/Keyless Entry Module/Service and Repair/Removal.
NEXT -- Continue to next step.
4. CHECK FOR DTC
(a) Clear the DTC See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs.
OK:
DTC B1242 is not output.
NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- END (DOOR CONTROL RECEIVER WAS DEFECTIVE)
From 08/2009
DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: B1242: Wireless Door Lock Tuner Circuit Malfunction
B1242 - Wireless Door Lock Tuner Circuit Malfunction
DESCRIPTION
The door control receiver is used to receive electrical waves relating to the entry functions of the smart access system with push-button start. The
certification ECU (smart key ECU assembly) decodes the requested smart access system with push-button start operation by identifying a key code
based on the electric waves received via the door control receiver. The door control receiver receives a signal from the door control transmitter and
sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). The certification
ECU (smart key ECU assembly) then sends a command, according to the requested operation, to each ECU (ex. if door lock operation is requested,
the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU (multiplex network body ECU).
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* When replacing or inspecting the door control receiver and wire harness, do not change the position or length of the wire
harness. If the wire harness is too close to the door control receiver, entry and wireless function performance may be affected.
* Before performing the inspection, check that there are no problems related to the CAN communication system and LIN
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