AutoCodes
 
OBDII Code List
 
B1242 LEXUS

B1242 LEXUS - Wireless Door Lock Tuner Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
Comments  |  Add Comment

B1242 LEXUS Possible Causes

  • Faulty Door Control Receiver
  • Door Control Receiver harness is open or shorted
  • Door Control Receiver circuit poor electrical connection
  • Faulty Multiplex Network Body ECU

First diagnose B1242 LEXUS code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the B1242 LEXUS code

    Labor: 1.0

    The cost of diagnosing the B1242 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

B1242 LEXUS Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1242 Lexus Description

The door control receiver is used to receive electrical waves relating to the entry functions of the smart access system with push-button start (for Entry Function). The certification ECU (smart key ECU assembly) decodes the requested smart access system with push-button start (for Entry Function) operation by identifying a key code based on the electric waves received via the door control receiver. The door control receiver receives a signal from the door control transmitter and sends signals to the main body ECU (cowl side junction block LH) through the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) then sends a command, according to the requested operation, to each ECU (ex. if door lock operation is requested, the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU).
OBDII Code B1242 Lexus - Wireless Door Lock Tuner Circuit Malfunction - AutoCodes.com

B1242 LEXUS More Information

Need more information on how to fix the B1242 LEXUS code?
Get Access to Factory Service Manuals

Need more help?

Get the B1242 Lexus code diagnosed by a professional: Find a repair shop in your area

Related Information

B1242 LEXUS Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the B1242 Lexus code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧