DYNAMIC RADAR CRUISE CONTROL SYSTEM ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the driving support ECU assembly.

WIRING DIAGRAM

B00594YE05
w/ Stop and Start System
*1 from Engine Stop and Start ECU
*2 Driving Support ECU Assembly
B0058RXE09
w/o Stop and Start System
*1 IG1 NO.2 Relay
*2 ECU-IG NO.2
*3 Driving Support ECU Assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BATTERY AND BODY GROUND)


    1. B0057APC53
      *a

      Rear view of wire harness connector

      (to Driving Support ECU Assembly)

      Disconnect the driving support ECU assembly connector.

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

      Standard Voltage
      w/o Stop and Start System
      Tester Connection Switch Condition Specified Condition
      I19-30 (B) - Body ground Engine switch on (IG) 11 to 14 V
      I19-30 (B) - Body ground Engine switch off Below 1 V
      w/ Stop and Start System
      Tester Connection Switch Condition Specified Condition
      I19-30 (B) - Body ground Engine switch on (IG) 10.5 to 16 V
      I19-30 (B) - Body ground Engine switch off Below 1 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      I19-25 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR