CHARGING SYSTEM, Diagnostic DTC:P161A

DTC Code DTC Name
P161A Lost Communication with Alternator

DESCRIPTION

The ECM and generator assembly detect reception errors respectively.

The generator assembly reception error detected by the generator assembly is sent to the ECM via LIN communication. If an error occurs in the ECM or generator assembly, the ECM determines there is a LIN communication error and stores this DTC.

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

Generator assembly or ECM communication stop for about 17 minutes or more with the ignition switch ON.

(1 trip detection logic)

  • Wire harness and connector

  • Generator assembly

  • ECM

WIRING DIAGRAM

A001TZHE41
*a Generator Assembly
*b LIN Communication Line

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

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


    1. Disconnect the C63 ECM connector.

    2. Disconnect the C37 generator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C63-61 (LIN) - C37-2 (LIN) Always Below 1 Ω
      C63-61 (LIN), C37-2 (LIN) - body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE GENERATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR