СИСТЕМА ЗАРЯДКИ ДВИГАТЕЛЯ, Diagnostic DTC:P161A

DTC Code DTC Name
P161A Lost Communication with Alternator

DESCRIPTION

The ECM communicates with the generator assembly via LIN communication. If a LIN communication error is detected, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P161A Lost Communication with Alternator

A reception error in the generator control ECU assembly or generator assembly continues for approximately 17 minutes or more with the engine switch on (IG)

(1 trip detection logic)

  • Wire harness and connector

  • Generator assembly

  • ECM

 Charge warning light does not come on DTC stored

WIRING DIAGRAM

B006OSWE21
*a from Battery
*b Battery State Sensor Assembly
*c Generator Assembly
*d LIN Communication Line

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)


    1. Disconnect the D1 ECM connector.

    2. Disconnect the D15 generator assembly connector.

    3. Disconnect the A5 battery state sensor assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A5-2 (LIN) or D15-2 (LIN) - D1-31 (LIN) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A5-2 (LIN), D15-2 (LIN) or D1-31 (LIN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CLEAR DTCS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs, and then write them down.


      Powertrain > Engine > Trouble Codes

    6. Enter the following menus: Powertrain / Engine / Trouble Codes.

    7. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    8. Turn the engine switch off and wait 30 seconds.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTCS


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Allow the engine to idle for approximately 17 minutes or more.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Trouble Codes.

    6. Check for DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      Only DTC P161A is output. A
      DTC P161A and P162B are output. B
      DTCs are not output. C

    A

    REPLACE GENERATOR ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here