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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 communicates with the generator assembly via LIN communication. If a LIN communication error is detected, the ECM stores this DTC and illuminates the charging warning light.

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

Generator assembly or ECM communication stop for about 17 minutes or more with the engine switch on (IG).

(1 trip detection logic)

  • Wire harness and connector

  • Generator assembly

  • ECM

 Charging warning light does not come on 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 F2 ECM connector.

    2. Disconnect the F42 generator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F2-18 (LIN) - F42-2 (LIN) Always Below 1 Ω
      F2-18 (LIN), F42-2 (LIN) - body ground Always 10 kΩ or higher

    4. Reconnect the F42 generator assembly connector.

    5. Reconnect the F2 ECM connector.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE GENERATOR ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR