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Home >> Lexus >> 2012 >> CT 200h F Sport >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery System (Diagnostic Codes (P0A7F-123 - U029A-123)) >> Hybrid Battery System >> DTC P0A85-123: Hybrid Battery Pack Cooling Fan 1 >> Procedure

DTC P0A85-123: Hybrid Battery Pack Cooling Fan 1: Procedure

  1. CHECK FOR DTCS (HV) See step   1 

    B → GO TO  DIAGNOSTIC TROUBLE CODE CHART 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (VOLTAGE) 
    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. Connect the Techstream to the DLC3.
    3. 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 .
    4. 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.

    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.
    6. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying Q14 Connector Terminals
      GTY357396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      Q14-2 (VM0) - Q14-4 (GND0) Battery cooling blower is operating Below 5 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Battery Cooling Blower Assembly)

      HINT: 

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

    7. Turn the power switch off.

    NG → See step   5 

    OK: Go to next step 

  3. CHECK HYBRID BATTERY THERMISTOR (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR) 
    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. Disconnect connectors i1 and z10 from the battery smart unit.
      Fig 2: Identifying i1 And z10 Connector Terminals
      GTY349286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying i1 And z10 Connector Terminals
      GTY356541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      z10-6 (TBO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-12 (GBO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-5 (TB1) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-11 (GB1) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-4 (TB2) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-10 (GB2) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-1 (TCO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-7 (GCO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Battery Smart Unit)
    4. Connect the battery smart unit connectors.

    NG → See step   4 

    OK → See step   8 

  4. CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) 
    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. Check the wire harness and connectors of the battery temperature sensor and inlet air temperature sensor for abnormalities by sight and touch.
      Fig 4: Identifying Wire Harness & Connectors Of The Battery Temperature Sensor & Inlet Air Temperature Sensor
      GTY333565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Specified Condition

      There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

    NG → REPAIR HARNESS OR CONNECTOR 

    OK → See step   9 

  5. CHECK HARNESS AND CONNECTOR (VOLTAGE) 
    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. Disconnect connector Q14 from the battery cooling blower assembly.
      Fig 5: Identifying Battery Cooling Blower Assembly
      GTY358157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.
      Fig 6: Identifying Q14 Connector Terminals
      GTY352057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      Q14-2 (VM0) - Q14-4 (GND0) Power switch on (IG) Below 5 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Battery Cooling Blower Assembly)
      NOTE:

      If the power switch is turned on (IG) with the battery cooling blower assembly connector disconnected, DTC P0A84-123 will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to DTC CHECK / CLEAR .

    5. Connect the battery cooling blower assembly connector.

    NG → See step   6 

    OK → See step   7 

  6. 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. Disconnect connector Q14 from the battery cooling blower assembly.
      Fig 7: Identifying Battery Cooling Blower Assembly
      GTY358157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect connector i1 from the battery smart unit.
      Fig 8: Identifying i1 Connector Terminals
      GTY350357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance according to the value(s) in the table below.
      Fig 9: Identifying Q14 And i1 Connector Terminals
      GTY349662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      Q14-2 (VM0) and i1-7 (VM) - Other terminal 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)
    5. Connect the battery smart unit connector.
    6. Connect the battery cooling blower assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   8 

  7. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to  COMPONENTS 
  8. REPLACE BATTERY SMART UNIT. Refer to  COMPONENTS 
  9. REPLACE HYBRID BATTERY THERMISTOR. Refer to  COMPONENTS 
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