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

Memory

P161A

Lost Communication with Alternator

Diagnosis condition: Ignition switch to ON

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

DTC stored

WIRING DIAGRAM

E221308E18

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 B93 ECM connector.

    2. Disconnect the B90 generator assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B93-61 (LIN) - B90-2 (LIN)

      Always

      Below 1 Ω

      B93-61 (LIN) or B90-2 (LIN) - Body ground

      Ignition 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.

    Result

    Result

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPLACE GENERATOR ASSEMBLY