B1242

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: B1242; Wireless Door Lock Tuner Circuit Malfunction; 2013 MY FR-S [03/2012 -]
B1242 - Wireless Door Lock Tuner Circuit Malfunction

DESCRIPTION

This door control receiver receives signals from the transmitter and sends these signals to the main body ECU (network gateway ECU).





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (NETWORK GATEWAY ECU) - DOOR CONTROL RECEIVER)

(a) Disconnect the D6 main body ECU (network gateway ECU) connector.

(b) Disconnect the H28 door control receiver connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





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

2. INSPECT DOOR CONTROL RECEIVER (POWER SOURCE, GROUND)

(a) Measure the voltage and resistance according to the value(s) in the table below.









Standard Voltage:





Standard Resistance:





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

3. REPLACE DOOR CONTROL RECEIVER

(a) Temporarily replace the door control receiver with a new or normally functioning one Removal.

NEXT -- Continue to next step.

4. REGISTER RECOGNITION CODE

(a) Perform the Registration procedures Registration.

HINT
If a new or normal functioning door control receiver is available, connect it and check if the wireless door lock function is normal or the DTC is output. If the alternative receiver functions normally, replace the original door control receiver.

NEXT -- Continue to next step.

5. CLEAR DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

6. CHECK FOR DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC is not output.

HINT
Reinstall the parts, such as sensors and connectors, and restore the vehicle to its previous conditions before rechecking for DTCs.

NG -- REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Removal

OK -- END (DOOR CONTROL RECEIVER IS DEFECTIVE)