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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Hybrid Control System - Diagnostic Codes (1 Of 5)) >> HYBRID CONTROL SYSTEM (for 1Motor-HEV Model) >> DTC P0A96-11: Hybrid/EV Battery Cooling Fan 2 Circuit Short to Ground; DTC P0A96-4B: Hybrid/EV Battery Cooling Fan 2 Over Temperature [09/2023 - ] >> Procedure

DTC P0A96-11: Hybrid/EV Battery Cooling Fan 2 Circuit Short to Ground; DTC P0A96-4B: Hybrid/EV Battery Cooling Fan 2 Over Temperature [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    • None.
    • Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P0AFC-00 or P0AFC-96 is not output A
      P0AFC-00 or P0AFC-96 is output B

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING GTS (CONTROL THE HYBRID/EV BATTERY COOLING FAN) 

    Pre-procedure1

    • Clear the DTCs and Freeze Frame Data.

      Powertrain > Hybrid Control > Clear DTCs 

    • Select fan mode 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the No. 2 battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check if the fan operates and air is sucked in. In accordance with fail-safe system operation, the battery voltage sensor sends a command to operate the No. 2 battery cooling blower assembly.

      Powertrain > Hybrid Control > Active Test 

      Tester Display
      Control the Hybrid/EV Battery Cooling Fan
    • Check that the No. 2 battery cooling blower assembly operates, air is sucked into the inlet duct and the operation sound is normal.

      HINT: 

      The battery cooling blower assembly may not stop even when turning the cooling fan off in the "Control the Hybrid/EV Battery Cooling Fan" Active Test. This is due to HV system control and is not a malfunction.

      OK

      The No. 2 battery cooling blower assembly operates.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - NO. 2 BATTERY COOLING BLOWER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    Pre-procedure1

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

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

    • Disconnect the battery voltage sensor connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      I19-3 (FP1) - z11-12 (FP1) Ignition switch off Below 1 Ω Ω
      z11-12 (FP1) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      z11-12 (FP1) - Body ground Ignition switch ON Below 1 V V
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

      HINT: 

      As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

      Check the condition of each wire harness and each connector between the battery voltage sensor connector and No. 2 battery cooling blower assembly.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the No. 2 battery cooling blower assembly connector.
    • Reconnect the battery voltage sensor connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. READ VALUE USING GTS (HYBRID/EV BATTERY COOLING FAN 2 FREQUENCY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Clear the DTCs and Freeze Frame Data.

      Powertrain > Hybrid Control > Clear DTCs 

    • Select each fan mode 1 to 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the No. 2 battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check the frequency value. In accordance with fail-safe system operation, the battery voltage sensor sends a command to operate the No. 2 battery cooling blower assembly.

      Powertrain > Hybrid Control > Active Test 

      Active Test Display
      Control the Hybrid/EV Battery Cooling Fan
      Data List Display
      Hybrid/EV Battery Cooling Fan 2 Frequency
    • While the No. 2 battery cooling blower assembly is operating, compare the value in the Data List (Hybrid/EV Battery Cooling Fan 2 Frequency) with the frequency value that was actually measured at the No. 2 battery cooling blower assembly connector.

      Specified Condition

      Tester Connection Condition
      I19-3 (FP1) - I19-2 (GND1) Battery cooling blower assembly is operating.
      NOTE:

      Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      HINT: 

      Compare the values in each fan mode 1 to 6. If the Active Test cannot be performed, compare the values only in the current fan mode.

      GTY1229741Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 2 Battery Cooling Blower Assembly)

      Result

      Result Proceed to
      Both of the values in the Data List (Hybrid/EV Battery Cooling Fan 2 Frequency) and the actual measured value at the No. 2 battery cooling blower assembly connector are 0 Hz. A
      Other than above B

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. CHECK BATTERY VOLTAGE SENSOR 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I19-3 (FP1) - I19-2 (GND1) Ignition switch ON 4.5 to 5.5 V V
      GTY1229999Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 Battery Cooling Blower Assembly)
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the No. 2 battery cooling blower assembly connector.

    Result: 

    OK 

    REPLACE NO. 2 BATTERY COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

  6. CHECK BATTERY VOLTAGE SENSOR (FREQUENCY) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    Pre-procedure1

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

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

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Clear the DTCs and Freeze Frame Data.

      Powertrain > Hybrid Control > Clear DTCs 

    • Select each fan mode 1 to 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the No. 2 battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check the frequency value. In accordance with fail-safe system operation, the battery voltage sensor sends a command to operate the No. 2 battery cooling blower assembly.

      Powertrain > Hybrid Control > Active Test 

      Active Test Display
      Control the Hybrid/EV Battery Cooling Fan
      Data List Display
      Hybrid/EV Battery Cooling Fan 2 Frequency
    • While the No. 2 battery cooling blower assembly is operating, compare the value in the Data List (Hybrid/EV Battery Cooling Fan 2 Frequency) with the frequency value that was actually measured at the No. 2 battery cooling blower assembly connector.

      Specified Condition

      Tester Connection Condition Specified Condition
      I19-3 (FP1) - I19-2 (GND1) Battery cooling blower assembly is operating. Difference between the value in the Data List (Hybrid/EV Battery Cooling Fan 2 Frequency) and the actual measured value at the No. 2 battery cooling blower assembly connector is 10% or less.
      NOTE:

      Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      GTY1229741Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 2 Battery Cooling Blower Assembly)

      HINT: 

      Compare the values in each fan mode 1 to 6. If the Active Test cannot be performed, compare the values only in the current fan mode.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.

    Result: 

    OK 

    REPLACE NO. 2 BATTERY COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

  7. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - NO. 2 BATTERY COOLING BLOWER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Clear the DTCs and Freeze Frame Data.

      Powertrain > Hybrid Control > Clear DTCs 

    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I19-4 (IG1) - I19-2 (GND1) Ignition switch ON 11 to 14 V V
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

      HINT: 

      As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

      • Installation condition of fuse(s) (before removing fuse(s)) (IG circuit)
      • Fuse condition (before and after removing fuse(s)) (IG circuit)
      • Connection condition of connectors (IG circuit)
      • Wire harness condition (IG circuit)
      • Wire harness condition (GND circuit)
      GTY1239535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 Battery Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the No. 2 battery cooling blower assembly connector.

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - NO. 2 BATTERY COOLING BLOWER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Disconnect the battery voltage sensor connector.
      NOTE:
      • Before disconnecting the connector, check that it is not loose or disconnected.
      • Check that each connector between the battery voltage sensor and No. 2 battery cooling blower assembly is not loose or disconnected.
    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:
      • Before disconnecting the connector, check that it is not loose or disconnected.
      • Check the terminals of the connector for deformation and corrosion.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      z11-6 (SI1) - I19-1 (SI1) Ignition switch off Below 1 Ω Ω
      z11-6 (SI1) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      NOTE:

      Make sure that each connector between the battery voltage sensor and No. 2 battery cooling blower assembly is not loose or disconnected and its terminals are not deformed or corroded.

    Pre-procedure2

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I19-1 (SI1) - Body ground Ignition switch ON Below 1 V V
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

      HINT: 

      As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

      Check the condition of each wire harness and each connector between the battery voltage sensor connector and No. 2 battery cooling blower assembly.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the No. 2 battery cooling blower assembly connector.
    • Reconnect the battery voltage sensor connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK BATTERY VOLTAGE SENSOR 

    Pre-procedure1

    • Measure the resistance according to the value(s) in the table below.
      GTY1239331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Battery Voltage Sensor)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      z11-6 (SI1) - z11-7 (GND) Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Install the battery voltage sensor.

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  10

  10. CHECK BATTERY VOLTAGE SENSOR (SI1 VOLTAGE) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Remove the No. 2 battery cooling blower assembly.

      HINT: 

      Refer to REMOVAL [09/2023 - ]

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I19-1 (SI1) - I19-2 (GND1) Ignition switch ON 4.5 to 5.5 V V
      GTY1229744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 2 Battery Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Install the No. 2 battery cooling blower assembly.
    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.

    Result: 

    NG 

    REPLACE NO. 2 BATTERY COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  11

  11. CHECK NO. 2 BATTERY COOLING BLOWER ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Remove the No. 2 battery cooling blower assembly.

      HINT: 

      Refer to REMOVAL [09/2023 - ]

    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Clear the DTCs and Freeze Frame Data.

      Powertrain > Hybrid Control > Clear DTCs 

    • Select each fan mode 1 to 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the No. 2 battery cooling blower assembly.
      NOTE:

      If the Active Test cannot be performed, skip it and proceed to the next step to check the waveform. In accordance with fail-safe system operation, the battery voltage sensor sends a command to operate the No. 2 battery cooling blower assembly.

      Powertrain > Hybrid Control > Active Test 

      Tester Display
      Control the Hybrid/EV Battery Cooling Fan
    • Connect an oscilloscope to the No. 2 battery cooling blower assembly connector and check the waveform.
      Item Content
      Tester Connection I19-1 (SI1) - I19-2 (GND1)
      Equipment Setting 10 V/DIV., 1 ms./DIV.
      Condition Ignition switch ON, during Active Test

      HINT: 

      • Perform this inspection with the No. 2 battery cooling blower assembly connector connected.
      • The wave length will vary with the operating speed of the No. 2 battery cooling blower assembly.
      GTY1239484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 2 Battery Cooling Blower Assembly
      GTY597063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Waveform 1

      Result

      Result Proceed to
      Normal (The pulse output of waveform 1) A
      No pulse generation B

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Install the No. 2 battery cooling blower assembly.

    Result: 

    A 

    REPLACE NO. 2 BATTERY COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    B 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

  12. CHECK RELAY (BATT FAN) 

    Pre-procedure1

    • Remove the BATT FAN relay from the No. 1 luggage room relay block and No. 1 junction block assembly.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω
      GTY483225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Install the BATT FAN relay.

    Result: 

    NG 

    REPLACE RELAY (BATT FAN) 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (NO. 1 LUGGAGE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - BODY GROUND) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Remove the BATT FAN relay from the No. 1 luggage room relay block and No. 1 junction block assembly.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      2 (BATT FAN relay holder) - Body ground Ignition switch off Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Install the BATT FAN relay.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (NO. 1 LUGGAGE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - AUXILIARY BATTERY) 

    Pre-procedure1

    • Remove the BATT FAN relay from the No. 1 luggage room relay block and No. 1 junction block assembly.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      1 (BATT FAN relay holder) - Body ground Ignition switch ON 11 to 14 V V
      NOTE:

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

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Install the BATT FAN relay.

    Result: 

    NG 

    GO TO ECU POWER SOURCE CIRCUIT. Refer to  ECU Power Source Circuit [09/2023 - ] 

    Result: 

    OK 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY COOLING BLOWER ASSEMBLY - BODY GROUND) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      I19-2 (GND1) - Body ground Ignition switch off Below 1 Ω Ω
      GTY1230002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 Battery Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the No. 2 battery cooling blower assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BODY GROUND) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Disconnect the battery voltage sensor connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      z11-7 (GND) - Body ground Ignition switch off Below 1 Ω Ω
      GTY1232592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Battery Voltage Sensor)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the battery voltage sensor connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - NO. 2 BATTERY COOLING BLOWER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

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

    • Remove the BATT FAN relay from the No. 1 luggage room relay block and No. 1 junction block assembly.
      NOTE:

      Check the terminals of the relay for deformation and corrosion.

    • Disconnect the No. 2 battery cooling blower assembly connector.
      NOTE:
      • Check that each connector between the BATT FAN relay and No. 2 battery cooling blower assembly is not loose or disconnected.
      • Before disconnecting the connector, check that it is not loose or disconnected.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      5 (BATT FAN relay holder) - I19-4 (IG1) Ignition switch off Below 1 Ω Ω
      NOTE:
      • When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
      • Check that each connector between the BATT FAN relay and No. 2 battery cooling blower assembly is not loose or disconnected.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the No. 2 battery cooling blower assembly connector.
    • Install the BATT FAN relay.

    Result: 

    OK 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR