CHARGING SYSTEM, Diagnostic DTC:P161A

DTC Code DTC Name
P161A LIN Communication Error with Alternator

DESCRIPTION

The generator with regulator assembly communicates with the power management control ECU*1 or engine stop and start ECU*2 through the LIN communication system.


DTC No. DTC Detection Condition Trouble Area
P161A

Generator with regulator assembly, power management control ECU*1 or engine stop and start ECU*2 communication stop for 5 seconds or more with the ignition switch ON

(1-trip detection logic)

  • LIN communication system

  • Generator with regulator assembly

  • Power management control ECU*1

  • Engine stop and start ECU*2

WIRING DIAGRAM

A005HG6E03

CAUTION / NOTICE / HINT

Note


  • After repair or replacement, check to disappear DTC. It takes 20 minutes maximum to display DTC after turning the ignition switch to ON. So, confirm not to display DTC more than 20 minutes.

  • When rotational vibration of engine relating to electrical load is abnormally big, there is possibility of LIN communication error. Confirm whether DTC P161A is output for 20 minutes.

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (GENERATOR WITH REGULATOR ASSEMBLY - POWER MANAGEMENT CONTROL ECU OR ENGINE STOP AND START ECU )


    1. w/o Stop and Start System


      1. Disconnect the A52 power management control ECU connector.

      2. Disconnect the B4 generator with regulator assembly connector.

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

        Standard Resistance (Check for Open)
        Tester Connection Condition Specified Condition
        B4-2 (LIN) - A52-17 (LIN1) Always Below 1 Ω
        Standard Resistance (Check for Short)
        Tester Connection Condition Specified Condition
        B4-2 (LIN) - Body ground Always 10 kΩ or higher
        A52-17 (LIN1) - Body ground Always 10 kΩ or higher

    2. w/ Stop and Start System


      1. Disconnect the A53 engine stop and start ECU connector.

      2. Disconnect the B4 generator with regulator assembly connector.

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

        Standard Resistance (Check for Open)
        Tester Connection Condition Specified Condition
        B4-2 (LIN) - A53-14 (LIN1) Always Below 1 Ω
        Standard Resistance (Check for Short)
        Tester Connection Condition Specified Condition
        B4-2 (LIN) - Body ground Always 10 kΩ or higher
        A53-14 (LIN1) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (w/ Generator with Regulator Assembly for 80A Type) B
      OK (w/ Generator with Regulator Assembly for 100A Type) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    INSPECT GENERATOR WITH REGULATOR ASSEMBLY (for 100A Type) Click here

    B

  3. INSPECT GENERATOR WITH REGULATOR ASSEMBLY (for 80A Type)


    1. Remove the generator with regulator assembly Click here.

    2. Inspect the generator with regulator assembly Click here.

      Result
      Result Proceed to
      NG A
      OK (w/o Stop and Start System) B
      OK (w/ Stop and Start System) C

    A

    REPLACE GENERATOR WITH REGULATOR ASSEMBLY (for 80A Type) Click here

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE ENGINE STOP AND START ECU Click here

  4. INSPECT GENERATOR WITH REGULATOR ASSEMBLY (for 100A Type)


    1. Remove the generator with regulator assembly Click here.

    2. Inspect the generator with regulator assembly Click here.

      Result
      Result Proceed to
      NG A
      OK (w/o Stop and Start System) B
      OK (w/ Stop and Start System) C

    A

    REPLACE GENERATOR WITH REGULATOR ASSEMBLY (for 100A Type) Click here

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE ENGINE STOP AND START ECU Click here