SFI SYSTEM, Diagnostic DTC:P0512, P0616, P0617, P081A

DTC Code DTC Name
P0512 Starter Request Circuit
P0616 Starter Relay Circuit Low
P0617 Starter Relay Circuit High
P081A Starter Disable Circuit Low

MONITOR DESCRIPTION

While the engine is being cranked, battery voltage is applied to terminal STA of the ECM. If the ECM detects the starter control (STA) signal after the engine is started, it determines that there is a malfunction in the STA circuit. The ECM then illuminates the MIL and stores the DTC.

DTC No. DTC Detection Condition Trouble Area
P0512

Starter signal remains input for 30 seconds or more after engine started.

(1 trip detection logic)

  • Starter system

  • ST relay circuit

  • ECM
P0616

No starter signal is input when engine started.

(1 trip detection logic)

  • Starter system

  • ST relay circuit

  • ECM
P0617

Starter signal remains input after engine started.

(1 trip detection logic)

  • Starter system

  • ST relay circuit

  • ECM
P081A

Short in ST CUT relay circuit is detected.

(1 trip detection logic)

  • Starter system

  • ST CUT relay circuit

  • ECM

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

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

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

  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. Idle the engine for 1 second or more.

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

  8. Read 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 / Utility / All Readiness.

  10. Input the DTC: P0512, P0616, P0617 or P081A.

  11. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not 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.

  12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to Starter Signal Circuit Click here.

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips


  • The following troubleshooting flowchart is based on the premise that the engine can be cranked normally.

    If the engine does not crank, proceed to Problem Symptoms Table Click here.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (STARTER SIGNAL, STARTER SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Starter Signal and Starter Switch.

    5. Read the value displayed on the GTS when the ignition switch is turned to ON and cranking.

      OK
      GTS Display Condition Normal Condition
      Starter Signal Ignition switch ON OFF
      Cranking ON
      Starter Switch Ignition switch ON OFF
      Cranking ON
      Result
      Result Proceed to
      NG (w/o Entry and Start System) A
      NG (w/ Entry and Start System) B
      OK C

    B

    READ VALUE USING GTS (ST CUT RELAY) Click here

    C

    CHECK WHETHER DTC OUTPUT RECURS Click here

    A

  2. INSPECT RELAY (ST)


    1. Inspect the ST relay Click here.


    NG

    REPLACE RELAY (ST)

    OK

  3. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM)


    1. Remove the ST relay from the engine room relay block assembly.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      ST relay terminal 3 - A33-17 (STSW2) Always Below 1 Ω
      ST relay terminal 1 - A35-26 (STA) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      ST relay terminal 3 or A33-17 (STSW2) - Body ground Always 10 kΩ or higher
      ST relay terminal 1 or A35-26 (STA) - Body ground Always 10 kΩ or higher

    OK

    CHECK STARTER SIGNAL CIRCUIT (W/O ENTRY AND START SYSTEM) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. READ VALUE USING GTS (ST CUT RELAY)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / ST CUT Relay.

    5. Read the value displayed on the GTS when the ignition switch is turned to ON and cranking.

      OK
      GTS Display Condition Normal Condition
      ST CUT Relay Ignition switch ON OFF
      Cranking ON

    NG

    INSPECT RELAY (ST CUT) Click here

    OK

  5. INSPECT RELAY (ST)


    1. Inspect the ST relay Click here.


    NG

    REPLACE RELAY (ST)

    OK

  6. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM)


    1. Remove the ST relay from the engine room relay block assembly.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      ST relay terminal 3 - A33-17 (STSW2) Always Below 1 Ω
      ST relay terminal 1 - A35-26 (STA) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      ST relay terminal 3 or A33-17 (STSW2) - Body ground Always 10 kΩ or higher
      ST relay terminal 1 or A35-26 (STA) - Body ground Always 10 kΩ or higher

    OK

    CHECK STARTER SIGNAL CIRCUIT (W/ ENTRY AND START SYSTEM) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT RELAY (ST CUT)


    1. Inspect the ST CUT relay Click here.


    NG

    REPLACE RELAY (ST CUT)

    OK

  8. CHECK HARNESS AND CONNECTOR (ST CUT RELAY - ECM)


    1. Remove the ST CUT relay from the engine room relay block assembly.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      ST CUT relay terminal 1 - A35-34 (STAR) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      ST CUT relay terminal 1 or A35-34 (STAR) - Body ground Always 10 kΩ or higher

    OK

    CHECK STARTER SIGNAL CIRCUIT (W/ ENTRY AND START SYSTEM) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

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

    6. Turn the ignition switch to ON and turn the tester on.

    7. Start the engine.

    8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine / Trouble Codes.

    10. Read DTCs.

      Result
      Result Proceed to
      No DTC is output A
      P0512, P0616, P0617 or P081A is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here