Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000017AL006X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: B1242; Wireless Door Lock Tuner Circuit Malfunction; 2007 MY LX470 [08/2006 -        ]

DTC

B1242

Wireless Door Lock Tuner Circuit Malfunction

SYSTEM DESCRIPTION

  • This DTC is output when a GND short of the RDA terminal is detected.

DTC No.

DTC Detection Condition

Trouble Area

B1242

GND short of RDA terminal
  • Wire harness
  • Door control receiver
  • Body ECU (Main)

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK WIRE HARNESS

(a) Disconnect the receiver connector.

(b) Disconnect the ECU connector.

(c) Check the continuity between the wire harness and body ground.

OK:

No Continuity

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

2.

CHECK BODY ECU

(a) Connect the ECU connector.

(b) Check the DTC.

OK:

B1242 is not output.

NG

REPLACE BODY ECU

OK

REPLACE DOOR CONTROL RECEIVER