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 through the LIN communication system.

DTC No. DTC Detection Condition Trouble Area
P161A

Generator with regulator assembly or power management control ECU communication stop for about 18 minutes or more with the ignition switch ON

(1-trip detection logic)

  • LIN communication system

  • Generator with regulator assembly

  • Power management control ECU

WIRING DIAGRAM

A01VE5ZE06

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. SYSTEM CHECK


    1. Check the vehicle specifications.

      Result
      Result Proceed to
      w/o Stop and Start System A
      w/ Stop and Start System B

    B

    CHECK HARNESS AND CONNECTOR (GENERATOR WITH REGULATOR ASSEMBLY -POWER MANAGEMENT CONTROL ECU) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (GENERATOR WITH REGULATOR ASSEMBLY - POWER MANAGEMENT CONTROL ECU )


    1. Disconnect the A52 power management control ECU connector.

    2. Disconnect the B3 generator with regulator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B3-1 (LIN) - A52-17 (LIN1) Always Below 1 Ω
      B3-1 (LIN) - Body ground Always 10 kΩ or higher
      A52-17 (LIN1) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    INSPECT GENERATOR WITH REGULATOR ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (GENERATOR WITH REGULATOR ASSEMBLY -POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the A90 power management control ECU connector.

    2. Disconnect the B3 generator with regulator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B3-1 (LIN) - A90-17 (LIN1) Always Below 1 Ω
      B3-1 (LIN) - Body ground Always 10 kΩ or higher
      A90-17 (LIN1) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

  5. INSPECT GENERATOR WITH REGULATOR ASSEMBLY


    1. Remove the generator with regulator assembly.


    2. Inspect the generator with regulator assembly.


      Result
      Result Proceed to
      OK A
      NG (for DENSO Made) B
      NG (for VALEO Made) C

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    B

    REPLACE GENERATOR WITH REGULATOR ASSEMBLY Click here

    C

    REPLACE GENERATOR WITH REGULATOR ASSEMBLY Click here