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: 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

 Displayed DTC stored

WIRING DIAGRAM

A01QRWAE20

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. Disconnect the A75 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
      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. READ OUTPUT DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off and wait at least 30 seconds.

    6. Start the engine and wait 17 minutes or more.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      Only P161A is output A
      P161A and P162B are output B
      No DTC is output C

    A

    REPLACE GENERATOR ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here