LEMON Manuals: Even more car manuals for everyone
Home >> Scion >> 2014 >> iQ EV >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery System (Diagnostic Codes & Symptom Tests) (Electric) >> Hybrid Battery System >> DTC P0A84-123: EV Battery No. 1 Pack Cooling Fan 1 Control Circuit Low >> Procedure

DTC P0A84-123: EV Battery No. 1 Pack Cooling Fan 1 Control Circuit Low: Procedure

  1. CHECK DTC OUTPUT (EV BATTERY) See step   1 

    B → See step   25 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / EV Battery / Active Test / Driving the Battery Cooling Fan.
    5. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan.

      HINT: 

      Changes to the air volume mode are performed slowly. Therefore, even if the air volume mode setting is suddenly changed from 1 to 6, the battery cooling blower assembly speed will proceed through each mode one at a time as it increases.

    6. Check that the fan operates and air is sucked into the inlet duct.

      HINT: 

      The cooling fan may not stop even when turning the cooling fan off in the "Driving the Battery Cooling Fan" Active Test. This is due to EV system control and not a malfunction.

      Standard

      The fan operates.

    7. Turn the power switch off.

    NG → See step   5 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - ELECTRIC VEHICLE BATTERY ASSEMBLY) See step   3 

    NG → See step   23 

    OK: Go to next step 

  4. INSPECT ELECTRIC VEHICLE BATTERY ASSEMBLY (NO. 1 BATTERY VOLTAGE SENSOR VOLTAGE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / EV Battery / Active Test / Driving the Battery Cooling Fan.
    5. Enter the following menus: All Data / VMF Fan Motor Voltage 1.
    6. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan.

    7. While the cooling fan is operating, compare the value in the data list (VMF Fan Motor Voltage 1) with the voltage value that was actually measured at the AG1 wire to wire connector.
      Fig 1: Identifying Motor Compartment Main Wire to Floor Wire Connector Terminals
      GTY391304Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Intermediate Connector Connected
      (Motor Compartment Main Wire to Floor Wire)      		 - -

      Standard

      Tester Connection Condition Specified Condition
      AG1-13 - Body ground Battery cooling blower is operating by the Active Test Difference between the value in the Data List (VMF Fan Motor Voltage 1) and the actual measurement value is 1 V or less.

      HINT: 

      Compare the values in each air volume mode (1 to 6). If the active test cannot be performed, compare the values only in the current air volume mode.

    8. Turn the power switch off.

    OK → See step   21 

    NG → See step   20 

  5. CHECK FUSES (BATT FAN) 
    1. Remove the BATT FAN fuse from the No. 1 motor compartment relay block.
      Fig 2: Identifying BATT FAN Fuse On No. 1 Motor Compartment Relay Block
      GTY392334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      BATT FAN fuse Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 1 Motor Compartment Relay Block
      *2 BATT FAN Fuse
    3. Install the BATT FAN fuse.

    NG → See step   15 

    OK: Go to next step 

  6. INSPECT NO. 1 INTEGRATION RELAY (BATT FAN) 
    1. Remove the No. 1 integration relay from the No. 1 motor compartment relay block.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying No. 1 Integration Relay
      GTY385792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      1A-1 - 1F-3 Auxiliary battery voltage applied between 1A-1 - 1D-4 terminals Below 1 Ω
      Auxiliary battery voltage not applied between 1A-1 - 1D-4 terminals 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 No. 1 Integration Relay
    3. Install the No. 1 integration relay.

    NG → See step   24 

    OK: Go to next step 

  7. INSPECT BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      Fig 4: Identifying No. 1 Motor Compartment Relay Block
      GTY387621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 1 Motor Compartment Relay Block - -
      *a Component with harness connected
      (No. 1 Integration Relay)      		 - -

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      1F-3 - Body ground Power switch on (IG) 11 to 14 V

      HINT: 

      Measure the voltage when the No. 1 integration relay connector is connected.

    3. Turn the power switch off.

    NG → See step   11 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - NO. 1 INTEGRATION RELAY) 
    1. Disconnect the No. 1 integration relay connector.
    2. Disconnect the battery cooling blower assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 5: Measuring Resistance Of Battery Cooling Blower Assembly - No. 1 Integration Relay Harness & Connector
      GTY385635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      1F-3 - A37-1 (IG0) Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to No. 1 Integration Relay)
      *b Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    4. Connect the battery cooling blower assembly connector.
    5. Connect the No. 1 integration relay connector.

    NG → See step   23 

    OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) 
    1. Disconnect the battery cooling blower assembly connector.
    2. Disconnect the power management control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 6: Measuring Resistance Of Battery Cooling Blower Assembly - Power Management Control ECU Harness & Connector
      GTY393002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A37-3 (SI0) - A22-11 (SI0) Power switch off Below 1 Ω
      A37-3 (SI0) - Body ground and other terminals Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
    4. Turn the power switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A22-11 (SI0) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.
    7. Connect the power management control ECU connector.
    8. Connect the battery cooling blower assembly connector.

    NG → See step   23 

    OK: Go to next step 

  10. INSPECT POWER MANAGEMENT CONTROL ECU (VOLTAGE) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      Fig 7: Measuring Voltage Of Power Management Control ECU Connector
      GTY391409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Power Management Control ECU)

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A22-11 (SI0) - Body ground Power switch on (IG) 11 to 14 V
    3. Turn the power switch off.

    OK → See step   22 

    NG → See step   21 

  11. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) 
    1. Disconnect the power management control ECU connector.
    2. Disconnect the No. 1 integration relay connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 8: Measuring Resistance Of No. 1 Integration Relay - Power Management Control ECU Harness & Connector
      GTY390833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      1D-4 - A24-12 (FCTL) Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to No. 1 Integration Relay)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    4. Turn the power switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A24-12 (FCTL) - Body ground Power switch off Below 1 V
      A24-12 (FCTL) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.
    7. Connect the power management control ECU connector.
    8. Connect the No. 1 integration relay connector.

    NG → See step   23 

    OK: Go to next step 

  12. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 
    1. Disconnect the power management control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 9: Measuring Resistance Of Power Management Control ECU - Body Ground Harness & Connector
      GTY390161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      C21-17 (E01) - Body ground Power switch off Below 1 Ω
      C21-24 (E1) - Body ground Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Power Management Control ECU)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    3. Connect the power management control ECU connector.

    NG → See step   23 

    OK: Go to next step 

  13. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 
    1. Disconnect the power management control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 10: Measuring Resistance Of Power Management Control ECU - Body Ground Harness & Connector
      GTY389820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      C22-29 (E02) - Body ground Power switch off Below 1 Ω
      C22-23 (E12) - Body ground Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Power Management Control ECU)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    3. Connect the power management control ECU connector.

    NG → See step   23 

    OK: Go to next step 

  14. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - NO. 1 INTEGRATION RELAY) 
    1. Disconnect the No. 1 integration relay connector.
    2. Disconnect the battery cooling blower assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 11: Measuring Resistance Of Battery Cooling Blower Assembly - No. 1 Integration Relay Harness & Connector
      GTY385635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A37-1 (IG0) - Body ground and other terminals Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to No. 1 Integration Relay)
      *b Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    4. Connect the battery cooling blower assembly connector.
    5. Connect the No. 1 integration relay connector.

    OK → See step   22 

    NG → See step   23 

  15. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - NO. 1 INTEGRATION RELAY) 
    1. Disconnect the No. 1 integration relay connector.
    2. Disconnect the battery cooling blower assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 12: Measuring Resistance Of Battery Cooling Blower Assembly - No. 1 Integration Relay Harness & Connector
      GTY385635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A37-1 (IG0) - Body ground and other terminals Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to No. 1 Integration Relay)
      *b Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    4. Connect the battery cooling blower assembly connector.
    5. Connect the No. 1 integration relay connector.

    NG → See step   17 

    OK: Go to next step 

  16. INSPECT BATTERY COOLING BLOWER ASSEMBLY 
    1. Disconnect the A37 battery cooling blower assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 13: Measuring Resistance Of Battery Cooling Blower Assembly Connector
      GTY385518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (IG0) - 4 (GND0) Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Battery Cooling Blower Assembly)
    3. Connect the battery cooling blower assembly connector.

    OK → See step   19 

    NG → See step   18 

  17. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → See step   19 

  18. REPLACE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to COMPONENTS

    NEXT: Go to next step 

  19. REPLACE FUSES 

    NEXT → See step   26 

  20. REPLACE ELECTRIC VEHICLE BATTERY ASSEMBLY 

    Refer to COMPONENTS

    NEXT → See step   26 

  21. REPLACE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to COMPONENTS

    NEXT → See step   26 

  22. POWER MANAGEMENT CONTROL ECU MUST BE REPLACED 
    1. Even though it has been determined that the power management control ECU needs to be replaced, make sure to inspect the voltage difference between No. 1 EV battery and No. 2 EV battery before replacing it.

    NEXT → See step   26 

  23. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → See step   26 

  24. REPLACE NO. 1 INTEGRATION RELAY 

    Refer to COMPONENTS

    NEXT → See step   26 

  25. GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  26. GO TO NO. 1 EV BATTERY - NO. 2 EV BATTERY VOLTAGE DIFFERENCE INSPECTION. Refer to  No. 1 EV Battery - No. 2 EV Battery Voltage Difference Inspection 
scientia non olet · About LEMON Manuals