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Home >> Toyota >> 2019 >> Sienna Limited, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transaxle System [UA80E] - Diagnostic Codes (1 Of 3)) >> Automatic Transaxle System >> DTC P0615-12: Starter Relay Circuit Short to Battery [11/2017 - ] >> Procedure

DTC P0615-12: Starter Relay Circuit Short to Battery [11/2017 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM (STARTER SW) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Transmission / Data List / Starter SW.
    5. According to the display on the Techstream, read the Data List.

      Standard

      Condition Starter SW
      Ignition switch ON OFF
    6. According to the display on the Techstream, read the Data List while the vehicle is being driven with an engine speed of 1000 rpm or more at a vehicle speed of 20 km/h (12.43 mph) or more.
      WARNING:

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

      Standard

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

      HINT: 

      If the result of either of the above is not as specified, proceed to the next step with the ignition switch ON, Techstream connected and Data List item "Starter SW"selected.

      Result

      Result Proceed to
      NG (w/ Smart Entry and Start System) A
      NG (w/o Smart Entry and Start System) B
      OK C

      HINT: 

      If the starter assembly operates continuously when the ignition switch is turned ON, proceed to the next step without reading the Data List item "Starter SW".

    Result: 

    B 

    See step  8

    Result: 

    C 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2016 - ] 

    Result: 

    A 

    See step  2

  2. INSPECT ST RELAY (CHECK FOR SHORT CIRCUIT) 
    1. Enter the following menus: Powertrain / Transmission / Data List / Starter SW.
    2. Remove the ST relay from the engine room relay block and junction block assembly.
    3. According to the display on the Techstream, 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

      HINT: 

      • When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST relay is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE ST RELAY 

    Result: 

    A 

    See step  3

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder

    HINT: 

    The purpose of this step is to check for ST relay terminal voltage under abnormal conditions.

    1. Remove the ST relay from the No. 1 engine room relay block and junction block assembly.
    2. Turn the ignition switch to ON.
    3. Measure the voltage between ST relay terminal 2 and body ground.

      HINT: 

      • 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 ignition switch ON and do not install the ST relay.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.
      • If any voltage was measured with the ignition switch ON, one of the following malfunctions is suspected:
        • Short to +B in the circuit of a connected ECU or the switch.
        • Short to +B in the wire harness.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. INSPECT PARK/NEUTRAL POSITION SWITCH (CHECK FOR SHORT CIRCUIT) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder
    1. Disconnect the B66 park/neutral position switch connector.
    2. Measure the voltage between ST 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 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected. B

      HINT: 

      • If the voltage is the same before and after disconnecting the connector, the park/neutral position switch is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE PARK/NEUTRAL POSITION SWITCH. Refer to  REMOVAL [08/2016 - ] 

    Result: 

    A 

    See step  5

  5. INSPECT ECM (CHECK FOR SHORT CIRCUIT) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder
    1. Disconnect the A69 ECM connector.
    2. Measure the voltage between ST 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 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected. B

      HINT: 

      • 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 Techstream.

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH - POWER MANAGEMENT CONTROL ECU - ST RELAY) 
    1. Disconnect the A69 ECM connector.
    2. Disconnect the B66 park/neutral position switch connector.
    3. Disconnect the A35 power management control ECU connector.
    4. Remove the ST relay from the engine room relay block and junction block assembly.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A69-43 (STA), B66-9 (L), A35-2 (STA) or 2 (ST relay) - Other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (CHECK FOR STA TERMINAL VOLTAGE OF POWER MANAGEMENT CONTROL ECU) 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. REPLACE ECM 
    1. Replace the ECM.

      Refer to COMPONENTS [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM A/T CODE REGISTRATION. Refer to  REGISTRATION [08/2016 - ] 

  8. INSPECT ST RELAY (CHECK FOR SHORT CIRCUIT) 
    1. Enter the following menus: Powertrain / Transmission / Data List / Starter SW.
    2. Remove the ST relay from the engine room relay block and junction block assembly.
    3. According to the display on the Techstream, 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

      HINT: 

      • When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST relay is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE ST RELAY 

    Result: 

    A 

    See step  9

  9. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder

    HINT: 

    The purpose of this step is to check for ST relay terminal voltage under abnormal conditions.

    1. Remove the ST relay from the No. 1 engine room relay block and junction block assembly.
    2. Turn the ignition switch to ON.
    3. Measure the voltage between ST relay terminal 2 and body ground.

      HINT: 

      • 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 ignition switch ON and do not install the ST relay.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.
      • If any voltage was measured with the ignition switch ON, one of the following malfunctions is suspected:
        • Short to +B in the circuit of a connected ECU or the switch.
        • Short to +B in the wire harness.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. INSPECT PARK/NEUTRAL POSITION SWITCH (CHECK FOR SHORT CIRCUIT) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder
    1. Disconnect the B66 park/neutral position switch connector.
    2. Measure the voltage between ST 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 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected. B

      HINT: 

      • If the voltage is the same before and after disconnecting the connector, the park/neutral position switch is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE PARK/NEUTRAL POSITION SWITCH. Refer to  REMOVAL [08/2016 - ] 

    Result: 

    A 

    See step  11

  11. INSPECT ECM (CHECK FOR SHORT CIRCUIT) 
    GTY703305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST Relay Holder
    1. Disconnect the A69 ECM connector.
    2. Measure the voltage between ST 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 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected. B

      HINT: 

      • 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 Techstream.

    Result: 

    A 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STA SIGNAL CIRCUIT) 

    Result: 

    B 

    See step  12

  12. REPLACE ECM 
    1. Replace the ECM.

      Refer to COMPONENTS [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM A/T CODE REGISTRATION. Refer to  REGISTRATION [08/2016 - ] 

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