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Home >> Toyota >> 2019 >> Mirai >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Wireless Door Lock Control System - Diagnostic Codes & Symptom Tests >> Wireless Door Lock Control System >> DTC B1242: Wireless Door Lock Tuner Circuit Malfunction [06/2015 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • When replacing or inspecting the electrical key and TPMS receiver assembly and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the electrical key and TPMS receiver assembly, entry and wireless function performance may be affected.
  • This DTC is not stored within 10 seconds of the power switch being turned from on (IG) to off.
  • The wireless door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the wireless door lock control system after confirming that the communication system is functioning properly.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - ]

  • When replacing the electrical key and TPMS receiver assembly, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the Techstream and write them down before removal.

    Refer to REGISTRATION [06/2015 - ]

  • It is necessary to perform initialization (. Refer to INITIALIZATION [06/2015 - ] ) after registration (. Refer to REGISTRATION [06/2015 - ] ) of the transmitter IDs into the smart door control receiver assembly if the electrical key and TPMS receiver assembly has been replaced.
  • If the certification ECU (smart key ECU assembly) is replaced, refer to the Smart Key System (for Entry Function).

    Refer to PRECAUTION [06/2015 - ]