SFI SYSTEM (w/ Dual VVT-i), Diagnostic DTC:P161A

DTC Code DTC Name
P161A Lost Communication with Alternator

DESCRIPTION

The ECM and generator assembly detect reception errors respectively.

DTC No. DTC Detection Condition Trouble Area
P161A

A reception error in the ECM or generator assembly continues for approximately 5 seconds or more with the ignition switch ON.

(1 trip detection logic)

  • Wire harness or connector

  • Generator assembly

  • ECM

MONITOR DESCRIPTION

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.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

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

  5. Turn the ignition switch to ON and turn the GTS on.

  6. Wait 5 seconds or more.

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

  8. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  10. Input the DTC: P161A.

  11. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

B007TLFE03

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (GENERATOR - ECM)


    1. Disconnect the generator connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D108-1 (LIN) - D116-31 (LIN) Always Below 1 Ω
      D108-1 (LIN) or D116-31 (LIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT GENERATOR ASSEMBLY


    1. Inspect the generator assembly Click here.


    NG

    REPLACE GENERATOR ASSEMBLY Click here

    OK

    REPLACE ECM Click here