Wireless Door Lock Control System

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 receivers signals from the transmitter and sends these signals to the multiplex network body ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (BETWEEN MULTIPLEX NETWORK BODY ECU - DOOR CONTROL RECEIVER)

(a) Disconnect the multiplex network body ECU (D8) connector and the door control receiver connector.

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

Resistance:

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

2. INSPECT DOOR CONTROL RECEIVER (+B TERMINAL)

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

Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT)
OK -- Continue to next step.

3. INSPECT DOOR CONTROL RECEIVER (GND TERMINAL)

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

Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

4. REPLACE DOOR CONTROL RECEIVER

(a) Reconnect the multiplex network body ECU (D8) connector.

(b) Replace the door control receiver.

(c) Perform the registration procedures Registration.

HINT
If a new or 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.

5. RECONFIRM DTC OUTPUT

(a) Clear the DTC Wireless Door Lock Control 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

B -- END

A -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY