Engine Immobiliser W/O Smart Key

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. This DTC is output when the applicable RDA signal cannot be received within 1 second of PRG signal being output from the main body ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





(a) Disconnect the E17 ECU connector.

(b) Disconnect the L18 receiver connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

2. CHECK WIRE HARNESS (DOOR CONTROL RECEIVER - BATTERY AND BODY GROUND)





(a) Disconnect the L18 receiver connector.

(b) Measure the resistance and voltage of the wire harness side connector.

Standard resistance:





Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND 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.

(b) Perform the REGISTRATION procedures Registration.

NEXT -- Continue to next step.

4. CHECK FOR DTC

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

(b) Recheck for DTC.

OK:

DTC B1242 is not output.

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

OK -- END (DOOR CONTROL RECEIVER IS DEFECTIVE)