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DTC B15CC: Backup Battery Failure [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC 
    1. Turn the power switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG) and wait for 10 seconds.
    4. Turn the Techstream on.
    5. Perform "Health Check" and check for current DTCs. Refer to HEALTH CHECK [08/2013 - ] .

      Result

      Result Proceed to
      DTC B15CC is output. A
      DTC B15CC is not output. B

    B → See step   8 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BUB) 
    1. Disconnect the H101 DCM (Telematics Transceiver) connector.
    2. Disconnect the H103 BUB (Back-Up Battery) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H101-30 (BBI+) - H103-1 (BBO+) Always Below 1 Ω
      H101-13 (BBI-) - H103-5 (BBO-) Always Below 1 Ω
      H101-20 (CTR1) - H103-3 (BTR1) Always Below 1 Ω
      H101-21 (CTR2) - H103-4 (BTR2) Always Below 1 Ω
      H101-30 (BBI+) - Body ground Always 10 kΩ or higher
      H101-13 (BBI-) - Body ground Always 10 kΩ or higher
      H101-20 (CTR1) - Body ground Always 10 kΩ or higher
      H101-21 (CTR2) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. REPLACE BUB (BACK-UP BATTERY) 
    1. Replace the BUB (Back-Up Battery) with a normal one and check if the same problem occurs again. Refer to REMOVAL [08/2013 - ] .
      NOTE:

      The BUB (Back-Up Battery) must not be replaced while an ACN call is in progress. Refer to ACN CALL END [08/2013 - ] .

    NEXT: Go to next step 

  4. CLEAR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [08/2013 - ] .

    NEXT: Go to next step 

  5. RECHECK DTC 
    1. Recheck for DTCs and check if the same trouble occurs again. Refer to HEALTH CHECK [08/2013 - ] .

      OK

      No DTC is output.

    NG → See step   6 

    OK → END 

  6. REPLACE DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL [08/2013 - ] .
      NOTE:
      • The power switch must be off.
      • Do not replace the DCM (telematics transceiver) with one from another vehicle.

    NEXT: Go to next step 

  7. PERFORM PRL UPDATE 
    1. Perform "PRL UPDATE". Refer to PRL UPDATE [08/2013 - ] .

    NEXT → See step   9 

  8. CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
  9. PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [08/2013 - ]