SFI SYSTEM, Diagnostic DTC:P061512

DTC Code DTC Name
P061512 Starter Relay Circuit Short to Battery

MONITOR DESCRIPTION

While the engine is cranked, current flows from terminal STA2 of the engine stop and start ECU to terminal STA of the ECM (STA signal). If the ECM detects the starter control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then illuminates the MIL and stores the DTC.

This monitor runs when the vehicle is driven at 20 km/h (12.43 mph) or more for 20 seconds or more.

DTC No. DTC Detection Condition Trouble Area
P061512

All of the following conditions are met, and a (+B) battery voltage of 10.5 V or higher is applied to the ECM for 20 seconds (1 trip detection logic):


  • (a) The vehicle speed is 20 km/h (12.43 mph) or more.

  • (b) The engine speed is 1000 rpm or higher.

  • (c) The STA signal is on.

  • ST NO. 2 relay

  • Starter signal circuit

  • Engine stop and start ECU assembly

  • ECM

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

B001O79E17

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

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

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

  5. Turn the engine switch on (IG) and turn the GTS on [A].

  6. Start the engine.

  7. Idle the engine for 5 seconds or more [B].

  8. Drive the vehicle at 24 km/h (15 mph) or more for 20 seconds or more [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

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

  10. 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.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: P061512.

  13. 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.

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

WIRING DIAGRAM

B001O2YE04

CAUTION / NOTICE / HINT

Note


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

  • When the engine stop and start ECU assembly is replaced, it is necessary to read the number of starter operations before replacement, and to store this number in the new engine stop and start ECU assembly. Moreover, initialization/learning of the air conditioning information and initialization/learning of the deceleration sensor zero point are also required.

Tech Tips

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 SW)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Starter SW.

    5. According to the display on the GTS, read the Data List.

      Standard
      Condition Starter SW
      Engine switch on (IG) OFF
      Driving at 20 km/h (12.43 mph) or more (engine speed 1000 rpm or more) OFF

      Tech Tips


      • If the result of either of the above is not as specified, proceed to the next step with the engine switch on (IG), GTS connected and Data List item "Starter SW" selected.

      • If the starter assembly operates continuously when the engine switch is turned on (IG), proceed to the next step without reading the Data List item "Starter SW".


    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT ST NO. 2 RELAY (CHECK FOR SHORT CIRCUIT)


    1. Enter the following menus: Powertrain / Engine / Data List / All Data / Starter SW.

    2. Remove the ST NO. 2 relay from the engine room relay block and junction block assembly.

    3. According to the display on the GTS, read the Data List.

      Result
      Result Proceed to
      The Data List item "Starter SW" does not change from ON. A
      The Data List item "Starter SW" changes from ON to OFF. B

      Tech Tips


      • When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST NO. 2 relay is normal.

      • DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.


    B

    REPLACE ST NO. 2 RELAY

    A

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 2 RELAY)

    Tech Tips

    The purpose of this step is to check for ST NO. 2 relay terminal voltage under abnormal conditions.


    1. B001O3JE01

      Remove the ST NO. 2 relay from the engine room relay block and junction block assembly.

    2. Turn the engine switch on (IG).

    3. Measure the voltage between ST NO. 2 relay terminal 2 and body ground.

      Tech Tips


      • Make a note of the measured voltage as it will be necessary for the inspecting the change in voltage in the next step. As the next step should be conducted under the same conditions, keep the engine switch on (IG) and do not install the ST NO. 2 relay.

      • DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

      • If any voltage was measured with the engine switch on (IG), one of the following malfunctions is suspected:


        • Short to +B in the circuit of a connected ECU or the engine switch.

        • Short to +B in the wire harness.

      Text in Illustration
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 ST NO. 2 Relay

    NEXT

  4. INSPECT ENGINE STOP AND START ECU ASSEMBLY (CHECK FOR SHORT CIRCUIT)


    1. B001O3JE01
      Text in Illustration
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 ST NO. 2 Relay

      Disconnect the engine stop and start ECU assembly connector.

    2. Measure the voltage between ST NO. 2 relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

      Result
      Result Proceed to
      The voltage between ST NO. 2 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST NO. 2 relay terminal 2 and body ground changes when the connector is disconnected. B

      Tech Tips


      • If the voltage is the same before and after disconnecting the connector, the engine stop and start ECU assembly is normal.

      • DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.


    B

    REPLACE ENGINE STOP AND START ECU ASSEMBLY Click here

    A

  5. INSPECT ECM (CHECK FOR SHORT CIRCUIT)


    1. B001O3JE01
      Text in Illustration
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 ST NO. 2 relay

      Disconnect the ECM connector.

    2. Measure the voltage between ST NO. 2 relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

      Result
      Result Proceed to
      The voltage between ST NO. 2 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST NO. 2 relay terminal 2 and body ground changes when the connector is disconnected. B

      Tech Tips


      • If the voltage is the same before and after disconnecting the connector, the ECM is normal.

      • DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.


    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STA SIGNAL CIRCUIT)

    B

    REPLACE ECM Click here