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CHARGING SYSTEM, Diagnostic DTC:P161A

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DTC Code DTC Name
P161A Lost Communication with Alternator
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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
P161A Lost Communication with Alternator

Diagnosis condition:


  • Ignition switch ON

Malfunction status:


  • 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
Table 1. *a Generator Assembly *b LIN Communication Line
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WIRING DIAGRAM

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PROCEDURE


  1. Click here

    CHECK CHARGING SYSTEM


    1. Check the charging system.

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      Result
      Result
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CHARGING SYSTEM

  2. Click here

    CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)


    1. Disconnect the C60 ECM connector.

    2. Disconnect the C9 generator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C60-7 (LIN) - C9-2 (LIN) Always Below 1 Ω
      C60-7 (LIN) or C9-2 (LIN) - Body ground

      Ignition switch off

      (while LIN communication is stopped)

      		 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    INSPECT GENERATOR ASSEMBLY


    1. Inspect the generator assembly.


      Result
      Result
      OK
      NG