NAVIGATION SYSTEM (for Navigation Receiver Type) Reverse Signal Circuit

DESCRIPTION

The navigation ECU sub-assembly receives a reverse signal from the power management control ECU via the No. 1 integration relay.

WIRING DIAGRAM

A01JCQIE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)


    1. Disconnect the navigation ECU sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L130-2 (REV) - Body ground

      Power switch on (READY)

      Reverse (R) selected

      		 11 to 15.5 V
      L130-2 (REV) - Body ground

      Power switch on (READY)

      Except reverse (R) selected

      		 Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - NO. 1 INTEGRATION RELAY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - NO. 1 INTEGRATION RELAY)


    1. Disconnect the navigation ECU sub-assembly connector.

    2. Disconnect the No. 1 integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L130-2 (REV) - 1G-4 (NAV) Always Below 1 Ω
      L130-2 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the No. 1 integration relay connector.

    2. Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-13 (BKUP) - A21-15 (BL) Always Below 1 Ω
      1G-13 (BKUP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE NO. 1 INTEGRATION RELAY


    1. Replace the No. 1 integration relay with a new one or known good one Click here.

    2. Check that the malfunction disappears.

      OK
      Malfunction disappears.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)