B1242

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 are used to receive electric 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 electric waves received via the door control receiver.

* The door control receiver receives a signal from the wireless door control transmitter and sends signals to the main body ECU RH (cowl side junction block RH) 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 (e.g. If door lock operation is requested, the ECU sends a door lock command to the main body ECU RH (cowl side junction block RH)).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)

(a) Disconnect the P33 certification ECU (smart key ECU assembly) connector and P31 door control receiver connector.





(b) 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.

2. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Reconnect the P33 certification ECU (smart key ECU assembly) connector and P31 door control receiver connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- REPLACE DOOR CONTROL RECEIVER Removal