TELEMATICS SYSTEM, Diagnostic DTC:B1571

DTC Code DTC Name
B1571 Green LED Error

DESCRIPTION

This DTC is stored when the telematics transceiver detects an open or short in the manual (SOS) switch indicator (green) circuit of the manual (SOS) switch.

The manual (SOS) switch indicator (green) illuminates after the ignition switch is turned to ON.

If the telematics system is not active, the manual (SOS) switch indicator (green) will turn off.

If the telematics system is active, the manual (SOS) switch indicator (green) will blink while communicating with the call center.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1571 Green LED Error Current for the manual (SOS) switch indicator (green) exceeds malfunction threshold for 10 seconds when the ignition switch is ON.

  • Telematics transceiver

  • Map light assembly

  • Mayday switch assembly (manual (SOS) switch)

  • Wire harness or connector

WIRING DIAGRAM

A001TZSE02
*a GREEN
*b Mayday Switch Assembly (Manual (SOS) Switch)
*c Telematics Transceiver
*d Map Light Assembly

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Registration for Telematics System.

Click here

PROCEDURE


  1. CHECK DTC


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and wait for 10 seconds.

    4. Turn the GTS on.

    5. Check for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Telematics > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. INSPECT MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH INPUT VOLTAGE)


    1. A001XQZC02
      *a

      Component with harness connected

      (Map Light Assembly (Manual (SOS) Switch))

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      R4-5 (IND2) - R4-1 (GND3) 2 seconds after ignition switch turned to ON → Ignition switch off

      2 to 5 V

      → Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY) Click here

    OK

  3. INSPECT MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH) (GREEN INDICATOR)


    1. Remove the mayday switch assembly (manual (SOS) switch).

      Click here

    2. Inspect the mayday switch assembly (manual (SOS) switch).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAP LIGHT ASSEMBLY Click here

    NG

    REPLACE MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH) Click here

  4. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)


    1. Disconnect the F51 telematics transceiver connector.

    2. Disconnect the R4 map light assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F51-12 (IND2) - R4-5 (IND2) Always Below 1 Ω
      F51-12 (IND2) or R4-5 (IND2) - Body ground Always 10 kΩ or higher
      F51-26 (SIG-) - R4-1 (GND3) Always Below 1 Ω
      F51-26 (SIG-) or R4-1 (GND3) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here