CHARGING SYSTEM, Diagnostic DTC:P161A87

DTC Code DTC Name
P161A87 Lost Communication with Alternator Missing Message

DESCRIPTION

The ECM and generator assembly each detect reception malfunctions. A generator assembly reception malfunction detected by the generator assembly is sent to the ECM via LIN communication. If there is a malfunction in either the ECM or generator assembly, the ECM determines that there is a LIN communication malfunction and outputs a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P161A87 Lost Communication with Alternator Missing Message

Diagnosis condition: Engine switch on (IG)

When the ECM cannot receive LIN communication, the generator assembly cannot receive LIN communication for approximately 17 minutes or more.

Other: 1 trip

  • Generator assembly

  • ECM

  • Wire harness or connector

 Displayed DTC stored SAE: P161A

WIRING DIAGRAM

B0059XBE06

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 C20 ECM connector.

    2. Disconnect the C18 generator assembly connector.

    3. w/ Stop and Start System:

      Disconnect the A11 battery state sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C20-61 (LIN) - C18-2 (LIN) Always Below 1 Ω
      C20-61 (LIN) or C18-2 (LIN) - Body ground

      Engine switch off

      (while LIN communication is stopped)

      		 10 kΩ or higher
      Result
      Proceed to
      OK (w/ Stop and Start System)
      OK (w/o Stop and Start System)
      NG

    OK (w/o Stop and Start System)

    INSPECT GENERATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK (w/ Stop and Start System)

  3. READ OUTPUT DTC


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the engine switch off and wait at least 30 seconds.

    6. Start the engine and wait 17 minutes or more.

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

    8. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      Only P161A87 is output A
      P161A87 and P162B87 are output B
      No DTC is output C

    A

    REPLACE GENERATOR ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

  4. INSPECT GENERATOR ASSEMBLY


    1. Inspect the generator assembly.

      Click here

      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPLACE GENERATOR ASSEMBLY Click here