Wireless Door Lock Control System (w/o Smart Key System)

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): B1242: Wireless Door Lock Tuner Circuit Malfunction
B1242 - Wireless Door Lock Tuner Circuit Malfunction

DESCRIPTION

The door control receiver receives signals from the transmitter and sends these signals to the main body ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

(a) Disconnect the E6 main body ECU connector and the O17 door control receiver connector.





(b) 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. CHECK HARNESS AND CONNECTOR (BATTERY, BODY GROUND)

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





Standard:





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

3. REPLACE DOOR CONTROL RECEIVER

(a) Reconnect the E6 main body ECU connector.

(b) Replace the door control receiver with a normal one.

(c) Perform the registration procedures Registration.

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

NEXT -- Continue to next step.

4. CONFIRM DTC

(a) Clear the DTCs Wireless Door Lock Control System (w/o Smart Key System).

(b) Check if the same DTC is detected.

HINT
Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result:





C -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Wireless Door Lock Control System (w/o Smart Key System)

B -- END

A -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)