CHARGING SYSTEM, Diagnostic DTC:P161A

DTC Code DTC Name
P161A Lost Communication with Alternator

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:


  • Engine switch on (IG)

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

WIRING DIAGRAM

B003JRSE17
*a Generator Assembly
*b LIN Communication Line

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 C41 ECM connector.

    2. Disconnect the C8 generator assembly connector.

    3. Disconnect the A42 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
      C41-7 (LIN) - C8-2 (LIN) Always Below 1 Ω
      C41-7 (LIN) or C8-2 (LIN) - Body ground

      Engine switch off

      (while LIN communication is stopped)

      		 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. 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