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DTC B1570: Manual (SOS) Switch Red Indicator Malfunction [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 B1570, B1571 and B15C5 are output A
      DTC B1570 is output
      (DTC B1571 and B15C5 are not output)      		 B

    B → See step   6 

    A: Go to next step 

  2. INSPECT ROOF CONSOLE BOX ASSEMBLY (RED INDICATOR) 
    1. Disconnect the T11 roof console box assembly connector.
      GTY397992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect 2 dry-cell batteries (1.5 V each) in series.
    3. Connect the positive (+) lead to terminal T11-6 (IND1) and the negative (-) lead to terminal T11-9 (GND3) of the roof console box assembly connector.
    4. Check if the illumination for the manual (SOS) switch red indicator comes on.

      OK

      Red indicator comes on.

      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Roof Console Box Assembly)

    NG → See step   12 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX ASSEMBLY) 
    1. Disconnect the H101 DCM (Telematics Transceiver) connector.
    2. Disconnect the T11 roof console box assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H101-26 (SIG-) - T11-9 (GND3) Always Below 1 Ω
      H101-26 (SIG-) - Body ground Always 10 kΩ or higher
      H101-11 (IND1) - T11-6 (IND1) Always Below 1 Ω
      H101-11 (IND1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

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

    NEXT: Go to next step 

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

    NEXT → See step   13 

  6. INSPECT ROOF CONSOLE BOX ASSEMBLY (MANUAL (SOS) SWITCH RED INDICATOR CONDITION) 
    1. Confirm the red indicator status after the power switch is turned on (IG). Refer to SYSTEM DESCRIPTION [08/2013 - ] .

      Result

      Result Proceed to
      Red indicator remains off. A
      Red indicator remains on. B

    B → See step   10 

    A: Go to next step 

  7. INSPECT ROOF CONSOLE BOX ASSEMBLY (RED INDICATOR INPUT VOLTAGE) 
    1. Remove the roof console box assembly but do not disconnect the connectors. Refer to REMOVAL [08/2013 - ] .
      GTY397406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the positive lead of a voltmeter to terminal T11-6 (IND1), and the negative lead to terminal T11-9 (GND3).
    3. Measure the voltage.

      Standard

      1.0 to 8.5 V for 2 seconds after the power switch is turned on (IG).

      0 V when the power switch is off.

      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Roof Console Box Assembly)

    NG → See step   8 

    OK → See step   12 

  8. INSPECT DCM (TELEMATICS TRANSCEIVER) (RED INDICATOR OUTPUT VOLTAGE) 
    1. Remove the DCM (Telematics Transceiver) but do not disconnect the connectors. Refer to REMOVAL [08/2013 - ] .
      GTY417709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the positive lead of a voltmeter to terminal H101-11 (IND1), and the negative lead to body ground.
    3. Measure the voltage.

      Standard

      1.0 to 8.5 V for 2 seconds after the power switch is turned on (IG).

      0 V when the power switch is off.

      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (DCM (Telematics Transceiver))

    NG → See step   9 

    OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BODY GROUND) 
    1. Remove the DCM (Telematics Transceiver) but do not disconnect the connectors. Refer to REMOVAL [08/2013 - ] .
      GTY417709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H101-11 (IND1) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (DCM (Telematics Transceiver))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

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

    NEXT: Go to next step 

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

    NEXT → See step   13 

  12. REPLACE ROOF CONSOLE BOX ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
  13. PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [08/2013 - ] 
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