TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/o Multi-display) Clearance Sonar Main Switch Circuit

DESCRIPTION

When the back sonar or clearance sonar switch assembly is turned on, the on signal is input into the ECU.

WIRING DIAGRAM

B001CN0E05
*a from Ignition Switch
*b ECU-IG NO. 2
*c Back Sonar or Clearance Sonar Switch Assembly
*d Clearance Warning ECU

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY


    1. A01XJQOE01

      Remove the back sonar or clearance sonar switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3 (ECU) - 6 (IG) Pressed (on) Below 1 Ω
      3 (ECU) - 6 (IG) Not pressed (off) 10 kΩ or higher

    NG

    REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH - BATTERY AND BODY GROUND)


    1. A01XE0UE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Back Sonar or Clearance Sonar Switch)

      Disconnect the G13 back sonar or clearance sonar switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G13-6 (IG) - Body ground Ignition switch ON 11 to 14 V
      G13-6 (IG) - 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
      G13-7 (IND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH - CLEARANCE WARNING ECU)


    1. Disconnect the G13 back sonar or clearance sonar switch assembly connector.

    2. Disconnect the I1 clearance warning ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G13-3 (ECU) - I1-8 (CSSW) Always Below 1 Ω
      G13-3 (ECU) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR