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 engine room junction block assembly.

WIRING DIAGRAM

A011W3DE04

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
      I67-2 (REV) - Body ground

      Power switch on (IG)

      Shift lever in R

      		 11 to 14 V
      I67-2 (REV) - Body ground

      Power switch on (IG)

      Shift lever in any position except R

      		 Below 1 V
    NG

    CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the navigation ECU sub-assembly connector.

    2. Disconnect the engine room junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I67-2 (REV) - 1M-1 (BKLP) Always Below 1 Ω
      I67-2 (REV) - Body ground Always 10 kΩ or higher
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    1. Disconnect the engine room junction block assembly 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
      1F-9 (BLPS) - A38-15 (BL) Always Below 1 Ω
      1F-9 (BLPS) - Body ground Always 10 kΩ or higher
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY

    1. Replace the engine room junction block assembly 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 (ENGINE ROOM JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE)