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Home >> Audi >> 2009 >> S4 Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 575 (Hybrid Battery System (Diagnostic Codes (P0A75-123 - U029A-123))) >> Hybrid Battery System >> DTC P0A84-123: Hybrid Battery Pack Cooling Fan 1 Control Circuit Low [08/2013 - ] >> Procedure

DTC P0A84-123: Hybrid Battery Pack Cooling Fan 1 Control Circuit Low [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTCS (HV) See step   1 

    B → See step   19 

    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. Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.
      NOTE:

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

    4. Select air volume mode 6 in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.
    5. 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 HV system control and not a malfunction.

      OK

      The fan operates.

    6. Turn the power switch off.

    NG → See step   5 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Remove the rear side seat back assembly LH.
    4. Disconnect the g1 battery cooling blower assembly connector.
    5. Disconnect the P10 battery smart unit connector.
    6. Measure the resistance according to the value(s) in the table below.
      GTY402032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      g1-2 (FP0) - P10-5 (FP0) Power switch off Below 1 Ω
      g1-2 (FP0) or P10-5 (FP0) - Body ground 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 Battery Smart Unit)
    7. Reconnect the g1 battery cooling blower assembly connector.
    8. Reconnect the P10 battery smart unit connector.
    9. Install the rear side seat back assembly LH.
    10. Install the luggage compartment front trim cover.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT) 

    OK: Go to next step 

  4. CHECK BATTERY SMART UNIT (FREQUENCY) See step   6 

    NG → See step   18 

    OK → See step   16 

  5. CHECK FUSE (BATT FAN) 
    1. Remove the BATT FAN fuse from the No. 2 engine room relay block.
    2. Measure the resistance of the BATT FAN fuse.
      GTY319714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

      *1 No. 2 Engine Room Relay Block
      *2 BATT FAN Fuse
    3. Install the BATT FAN fuse to the No. 2 engine room relay block.

    NG → See step   12 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (VOLTAGE) 
    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Connect the cable to the negative (-) auxiliary battery terminal.
    4. Connect the Techstream to the DLC3.
    5. Turn the power switch on (IG).
      NOTE:
      • After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.
      • If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    6. Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.
      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. Enter the following menus: All Data / VMF Fan Motor Voltage 1.
    8. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.
    9. Measure the voltage according to the value(s) in the table below.
      GTY411869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      g1-1 (IG0) - Body ground Battery cooling blower is operating 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Battery Cooling Blower Assembly)
      *b Rear view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

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

      HINT: 

      Measure the voltage on the wire side of the connector that is part of the battery cooling blower.

    10. Turn the power switch off.
    11. Disconnect the cable from the negative (-) auxiliary battery terminal.
    12. Install the luggage compartment front trim cover.

    NG → See step   9 

    OK: Go to next step 

  7. CHECK BATTERY COOLING BLOWER ASSEMBLY 
    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Connect the cable to the negative (-) auxiliary battery terminal.
    4. Turn the power switch on (IG).
      NOTE:
      • After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.
      • If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    5. Using a service wire, connect terminals 3 (SI0) and 4 (GND0) of the battery cooling blower assembly connector.
      GTY406673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Specified Condition

      Tester Connection Condition Specified Condition
      g1-3 (SI0) - g1-4 (GND0) Power switch on (IG) Fan operates
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Battery Cooling Blower Assembly)
      *b Rear view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

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

      HINT: 

      If DTCs are output after the check, clear the DTCs using the Techstream.

    6. Turn the power switch off.
    7. Disconnect the cable from the negative (-) auxiliary battery terminal.
    8. Install the luggage compartment front trim cover.

    NG → See step   16 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) 
    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Disconnect the g1 battery cooling blower assembly connector.
    4. Disconnect the A31 power management control ECU connector. Refer to REMOVAL [08/2013 - ] .
    5. Measure the resistance according to the value(s) in the table below.
      GTY417765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      g1-3 (SI0) - A31-29 (SI0) Power switch off Below 1 Ω
      g1-3 (SI0) or A31-29 (SI0) - Body ground 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)
      NOTE:

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

    6. Connect the cable to the negative (-) auxiliary battery terminal.
    7. Turn the power switch on (IG).
    8. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      g1-3 (SI0) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the battery cooling blower assembly connector and power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    9. Turn the power switch off.
    10. Disconnect the cable from the negative (-) auxiliary battery terminal.
    11. Reconnect the g1 battery cooling blower assembly connector.
    12. Install the luggage compartment front trim cover.
    13. Reconnect the A31 power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   17 

  9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 
    1. Disconnect the H1 power management control ECU connector. Refer to REMOVAL [08/2013 - ] .
    2. Measure the resistance according to the value(s) in the table below.
      GTY402155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-5 (E01) - 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. Reconnect the H1 power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 
    1. Disconnect the H2 power management control ECU connector. Refer to REMOVAL [08/2013 - ] .
    2. Measure the resistance according to the value(s) in the table below.
      GTY416276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-5 (E02) - 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. Reconnect the H2 power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (IGCT RELAY - BATTERY COOLING BLOWER ASSEMBLY) 
    1. Remove the IGCT relay.
    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Disconnect the g1 battery cooling blower assembly connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY398909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (IGCT relay block) - g1-1 (IG0) Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 IGCT Relay
      *a Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
    5. Install the IGCT relay.
    6. Reconnect the g1 battery cooling blower assembly connector.
    7. Install the luggage compartment front trim cover.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   17 

  12. CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BATTERY COOLING BLOWER ASSEMBLY) 
    1. Remove the BATT FAN fuse.
    2. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    3. Disconnect the g1 battery cooling blower assembly connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY410330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      g1-1 (IG0) - Terminals except 2 (BATT FAN fuse block) and body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 BATT FAN fuse
      *a Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
    5. Install the BATT FAN fuse.
    6. Reconnect the g1 battery cooling blower assembly connector.
    7. Install the luggage compartment front trim cover.

    NG → See step   14 

    OK: Go to next step 

  13. CHECK BATTERY COOLING BLOWER ASSEMBLY 
    1. Remove the luggage compartment front trim cover. Refer to REMOVAL [08/2013 - ] - Step 10 .
    2. Disconnect the g1 battery cooling blower assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY420081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      g1-1 (IG0) - g1-4 (GND0) and body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Battery Cooling Blower Assembly)
    4. Reconnect the g1 battery cooling blower assembly connector.
    5. Install the luggage compartment front trim cover.

    NG → See step   15 

    OK → REPLACE FUSE (BATT FAN) 

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → REPLACE FUSE (BATT FAN) 

  15. REPLACE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to COMPONENTS [08/2013 - ]

    NEXT → REPLACE FUSE (BATT FAN) 

  16. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to  COMPONENTS [08/2013 - ] 
  17. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  COMPONENTS [08/2013 - ] 
  18. REPLACE BATTERY SMART UNIT. Refer to  COMPONENTS [08/2013 - ] 
  19. GO TO DTC CHART (P0AFC-123). Refer to  DTC P0AFC-123: Hybrid Battery Pack Sensor Module [08/2013 - ]  
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