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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 115 (Automatic Transaxle System (UB80F) - Diagnostic Codes (1 Of 3)) >> Automatic Transaxle System >> DTC P0615-12: Starter Relay Circuit Short to Battery [12/2021 - ] >> Procedure

DTC P0615-12: Starter Relay Circuit Short to Battery [12/2021 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK IF VEHICLE IS EQUIPPED WITH STOP AND START SYSTEM 
    1. Confirm the vehicle specifications.

      Result

      Result  Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  2

  2. 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.

      Powertrain > Transmission > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Starter SW Starter signal OFF or ON
      • ON: Starter operating
      • OFF: Starter not operating
      		 -

      Powertrain > Transmission > Data List 

      Tester Display
      Starter SW
    5. Read the Data List according to the display on the Techstream.

      OK

      Condition Starter SW
      Ignition switch ON OFF
    6. Read the Data List according to the display on the Techstream while the vehicle is being driven with an engine speed of 1000 rpm or more at a vehicle speed of 20 km/h (12 mph) or more.

      OK

      Condition Starter SW
      Driving at 20 km/h (12 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, the Techstream connected and Data List item "Starter SW" selected.

      Result

      Proceed to
      OK
      NG

      HINT: 

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

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

    Result: 

    NG 

    See step  3

  3. INSPECT ST NO. 1 RELAY (CHECK FOR SHORT CIRCUIT) 
    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.

      Powertrain > Transmission > Data List 

      Tester Display
      Starter SW
    5. Remove the ST NO. 1 relay from the No. 1 engine room relay block and junction block assembly.
    6. 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 NO. 1 relay is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE ST NO. 1 RELAY 

    Result: 

    A 

    See step  4

  4. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY) 

    HINT: 

    The purpose of this step is to check for ST NO. 1 relay terminal voltage under abnormal conditions.

    GTY1107820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Remove the ST NO. 1 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 NO. 1 relay terminal 2 and body ground.

      HINT: 

      • Make a note of the measured voltage as it will be necessary for 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 NO. 1 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  5

  5. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (CHECK FOR SHORT CIRCUIT) 
    GTY1107820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Disconnect the park/neutral position switch assembly connector.
    2. Measure the voltage between ST NO. 1 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. 1 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST NO. 1 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 assembly 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 ASSEMBLY 

    Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  6

  6. INSPECT ENGINE STOP AND START ECU (CHECK FOR SHORT CIRCUIT) 
    GTY1107820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Disconnect the engine stop and start ECU connector.
    2. Measure the voltage between ST NO. 1 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. 1 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST NO. 1 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 engine stop and start ECU is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE ENGINE STOP AND START ECU 

    Refer to REMOVAL [08/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  7

  7. INSPECT ECM (CHECK FOR SHORT CIRCUIT) 
    GTY1107820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Disconnect the ECM connector.
    2. Measure the voltage between ST NO. 1 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. 1 relay terminal 2 and body ground does not change when the connector is disconnected. (w/ Smart Key System) A
      The voltage between ST NO. 1 relay terminal 2 and body ground does not change when the connector is disconnected. (w/o Smart Key System) B
      The voltage between ST NO. 1 relay terminal 2 and body ground changes when the connector is disconnected. C

      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 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - ENGINE STOP AND START ECU - ST NO. 1 RELAY) 

    Result: 

    C 

    See step  9

    Result: 

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY - ENGINE STOP AND START ECU - ST NO. 1 RELAY) 
    1. Disconnect the ECM connector.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Disconnect the certification ECU (smart key ECU assembly) connector.
    4. Disconnect the engine stop and start ECU connector.
    5. Remove the ST NO. 1 relay from the No. 1 engine room relay block and junction block assembly.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A24-30 (STA), C31-9 (L), A15-20 (STA), A34-21 (STA) or 2 (ST NO. 1 relay) - Other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK SMART KEY SYSTEM (CHECK FOR STA TERMINAL VOLTAGE OF SMART KEY ECU ASSEMBLY) 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. REPLACE ECM 
    1. Replace the ECM.

      Refer to REMOVAL [08/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION 

    Refer to REGISTRATION [11/2018 - ]

  10. 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.

      Powertrain > Transmission > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Starter SW Starter signal OFF or ON
      • ON: Starter operating
      • OFF: Starter not operating
      		 -

      Powertrain > Transmission > Data List 

      Tester Display
      Starter SW
    5. Read the Data List according to the display on the Techstream.

      OK

      Condition Starter SW
      Ignition switch ON OFF
    6. Read the Data List according to the display on the Techstream while the vehicle is being driven with an engine speed of 1000 rpm or more at a vehicle speed of 20 km/h (12 mph) or more.

      OK

      Condition Starter SW
      Driving at 20 km/h (12 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, the Techstream connected and Data List item "Starter SW" selected.

      Result

      Proceed to
      OK
      NG

      HINT: 

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

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

    Result: 

    NG 

    See step  11

  11. INSPECT ST NO. 1 RELAY (CHECK FOR SHORT CIRCUIT) 
    1. Enter the following menus: Powertrain / Transmission / Data List / Starter SW.

      Powertrain > Transmission > Data List 

      Tester Display
      Starter SW
    2. Remove the ST NO. 1 relay from the No. 1 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 NO. 1 relay is normal.
      • DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

    Result: 

    B 

    REPLACE ST NO. 1 RELAY 

    Result: 

    A 

    See step  12

  12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY) 
    GTY923546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay

    HINT: 

    The purpose of this step is to check for ST NO. 1 relay terminal voltage under abnormal conditions.

    1. Remove the ST NO. 1 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 NO. 1 relay terminal 2 and body ground.

      HINT: 

      • Make a note of the measured voltage as it will be necessary for 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 NO. 1 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  13

  13. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (CHECK FOR SHORT CIRCUIT) 
    GTY923546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Disconnect the park/neutral position switch assembly connector.
    2. Measure the voltage between ST NO. 1 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. 1 relay terminal 2 and body ground does not change when the connector is disconnected. A
      The voltage between ST NO. 1 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 assembly 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 ASSEMBLY 

    Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  14

  14. INSPECT ECM (CHECK FOR SHORT CIRCUIT) 
    GTY923544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 ST NO. 1 Relay
    1. Disconnect the ECM connector.
    2. Measure the voltage between ST NO. 1 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. 1 relay terminal 2 and body ground does not change when the connector is disconnected. (w/o Smart Key System) A
      The voltage between ST NO. 1 relay terminal 2 and body ground does not change when the connector is disconnected. (w/ Smart Key System System) B
      The voltage between ST NO. 1 relay terminal 2 and body ground changes when the connector is disconnected. C

      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 (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST NO. 1 RELAY) 

    Result: 

    C 

    See step  16

    Result: 

    B 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY - ST NO. 1 RELAY) 
    1. Disconnect the ECM connector.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Disconnect the certification ECU (smart key ECU assembly) connector.
    4. Remove the ST NO. 1 relay from the No. 1 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
      A24-30 (STA), C31-9 (L), A15-20 (STA) or 2 (ST NO. 1 relay) - Other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK SMART KEY SYSTEM (CHECK FOR STA TERMINAL VOLTAGE OF SMART KEY ECU ASSEMBLY) 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. REPLACE ECM 
    1. Replace the ECM.

      Refer to REMOVAL [08/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM REGISTRATION 

    Refer to REGISTRATION [11/2018 - ]

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