AUTOMATIC HIGH BEAM SYSTEM Power Source Circuit

DESCRIPTION

When the ignition switch is ON, power is supplied to the pre-crash safety city sensor.

WIRING DIAGRAM

A004GFTE08
*1 from IG1 NO. 1 Relay
*2 GAUGE
*3 Pre-crash Safety City Sensor

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • When replacing the pre-crash safety city sensor, replace it with a new one and be sure to initialize the settings. If an ECU which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

  • When the pre-crash safety city sensor is replaced with a new one or it is removed, camera beam axis learning must be performed.

PROCEDURE


  1. CHECK CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK


    1. Check the customer problem analysis and symptom Click here.


    NEXT

  2. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the auxiliary battery voltage.

      Standard voltage
      11 to 14 V

    2. Using the parts location and system diagram, check the system for blown-out fuses, open or short circuits in the wire harness(es) and connectors that are not properly connected by performing a visual check.

      Tech Tips

      If the auxiliary battery voltage is 11 V or less, recharge or replace the auxiliary battery before proceeding to the next step.


    NEXT

  3. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY SENSOR - BATTERY AND BODY GROUND)

    Note

    DTCs may be output when connectors are disconnected during inspection. Therefore, make sure to clear the DTCs using the GTS once the inspection has been completed.


    1. A004F8YE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Sensor)

      Disconnect the pre-crash safety city sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      M6-7 (IG1) - Body ground Ignition switch ON 11 to 14 V
      M6-7 (IG1) - Body ground Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M6-10 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CAN COMMUNICATION SYSTEM


    1. Use the GTS to check if the CAN communication system is functioning normally Click here.

      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    B

    CHECK OUTPUT OF METER/GAUGE SYSTEM DTC U023A Click here

    A

  5. CHECK FOR DTC


    1. Check for DTCs and note any codes that are output Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs Click here.

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

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  6. CHECK DATA LIST/ACTIVE TEST


    1. Check the Data List/Active Test Click here.


    NEXT

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

  7. CHECK OUTPUT OF METER/GAUGE SYSTEM DTC U023A


    1. Clear the DTCs Click here.

    2. Check the DTCs Click here.

      Result
      Result Proceed to
      Past DTC U023A is output A
      Present DTC U023A is output B

    A

    GO TO CAN COMMUNICATION SYSTEM Click here

    B

  8. READ VALUE USING GTS


    1. Using the GTS, read the Data List Click here.

      PCS/LDA/RSA/LVN
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Low Temperature Status Existence of low temperature malfunction / OFF or ON

      OFF: Pre-crash safety city sensor low temperature malfunction does not exist

      ON: Pre-crash safety city sensor low temperature malfunction exists

      		 -
      High Temperature Status Existence of high temperature malfunction / OFF or ON

      OFF: Pre-crash safety sensor high temperature malfunction does not exist

      ON: Pre-crash safety sensor high temperature malfunction exists

      		 -
      Result
      Result Proceed to
      Temperature malfunction exists A
      Temperature malfunction does not exist (w/ Toyota Safety Sense) B
      Temperature malfunction does not exist (w/o Toyota Safety Sense) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  9. RETURN PRE-CRASH SAFETY CITY SENSOR TEMPERATURE TO NORMAL


    1. Return the temperature of the pre-crash safety city sensor to normal.


    NEXT

  10. CHECK FOR DTC


    1. Check for DTCs and note any codes that are output Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs Click here.

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

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  11. CHECK DATA LIST


    1. Check the Data List/Active Test Click here


    NEXT

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE