DTC    P0A84-123    Hybrid Battery Pack Cooling Fan 1

for Preparation Click here

DESCRIPTION

1. The speed of the battery cooling blower assembly is controlled by the power management control ECU. Battery cooling blower assembly power is supplied when the FCTL terminal of the power management control ECU turns on the battery blower relay. The power management control ECU sends command signals (SI) to the battery cooling blower assembly to get the fan speed corresponding to the HV battery temperature. Information about the voltage applied to the battery cooling blower assembly (VM) is sent to the power management control ECU as a monitor signal using serial communication via the battery smart unit.
   
   
   
   
   
   

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:

1. Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
   
2. After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work (Click here).
   

HINT:

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

1. Connect the intelligent tester to the DLC3.
   

2. Turn the power switch on (IG).
   

3. Enter the following menus: Powertrain / Hybrid Control / DTC.
   

4. Check if DTCs are output.
   

   Result:

   Result	Proceed to
   P0AFC-123 is not output.	A
   P0AFC-123 is also output.	B

5. Turn the power switch off.
   

B	GO TO DTC CHART (Click here)

A

1. Connect the intelligent tester 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.
   

   NOTICE:

   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.
   

NG	Go to step 5

OK

CAUTION:

Be sure to wear insulated gloves.

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

   NOTICE:

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

2. Disconnect connector Q14 from the battery cooling blower assembly.
   

3. Disconnect connector i1 from the battery smart unit.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Switch Condition	Specified Condition
   Q14-2 (VM0) - i1-7 (VM)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Switch Condition	Specified Condition
   Q14-2 (VM0) or i1-7 (VM) - 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)

5. Connect the battery cooling blower assembly connector.
   

6. Connect the battery smart unit connector.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

   NOTICE:

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

2. Connect the intelligent tester to the DLC3.
   

3. Turn the power switch on (IG).
   

   NOTICE:

   1. After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
      
   2. Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs (Click here).
      

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

   NOTICE:

   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. 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.
   

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 battery cooling blower assembly connector.
   

   Standard:

   Tester Connection	Condition	Specified Condition
   Q14-2 (VM0) - Q14-4 (GND0)	Battery cooling blower is operating.	Difference between the value in the Data List (VMF Fan Motor Voltage 1) and the actual measurement value is 1 V or less.

   Text in Illustration 

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

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.

NG	REPLACE BATTERY SMART UNIT (Click here)

OK
REPLACE BATTERY COOLING BLOWER ASSEMBLY (Click here)

1. Remove the No. 2 integration relay from the engine room junction block assembly (Click here).
   

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

   
   
   
   
   

   Text in Illustration 

   *1	No. 2 Integration Relay	*2	BATT FAN Fuse
   *3	BATT FAN Relay	-	-

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1C-1 - 1A-8	Battery voltage is applied across terminals 1A-6 and 1A-7.	Below 1 Ω
   	No battery voltage is applied across terminals 1A-6 and 1A-7.	10 kΩ or higher

3. Install the No. 2 integration relay (Click here).
   

NG	Go to step 13

OK

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

   NOTICE:

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

2. Connect the intelligent tester to the DLC3.
   

3. Turn the power switch on (IG).
   

   NOTICE:

   1. After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
      
   2. Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs (Click here).
      

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

   NOTICE:

   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. 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.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   Q14-1 (IG0) - Body ground	Battery cooling blower is operating.	11 to 14 V

   Text in Illustration 

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

   HINT:

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

8. Turn the power switch off.
   

NG	Go to step 9

OK

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

   NOTICE:

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

2. Turn the power switch on (IG).
   

   NOTICE:

   1. After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
      
   2. Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs (Click here).
      

3. Using a service wire, connect terminals 3 (SI0) and 4 (GND0) of the battery cooling blower assembly connector.
   

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   Q14-3 (SI0) - Q14-4 (GND0)	Power switch on (IG)	Fan operates

   Text in Illustration 

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

HINT:

If DTCs are output after the check, clear the DTCs using the intelligent tester.

4. Turn the power switch off.
   

NG	REPLACE BATTERY COOLING BLOWER ASSEMBLY (Click here)

OK

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   

2. Check that the service plug grip is not installed.
   

   NOTICE:

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

3. Disconnect connector Q14 from the battery cooling blower assembly.
   

4. Disconnect connector A19 from the power management control ECU (Click here).
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Switch Condition	Specified Condition
   Q14-3 (SI0) - A19-29 (SI0)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Switch Condition	Specified Condition
   Q14-3 (SI0) or A19-29 (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)

   NOTICE:

   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).
   

   NOTICE:

   Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs (Click here).

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   Q14-3 (SI0) - Body ground	Power switch on (IG)	Below 1 V

9. Turn the power switch off.
   

10. Connect the battery cooling blower assembly connector.
    

11. Connect the power management control ECU connector (Click here).
    

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

1. Disconnect connector A19 from the power management control ECU (Click here).
   

2. Remove the No. 2 integration relay (Click here).
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   1A-7 - A19-4 (FCTL)	Power switch off	Below 1 Ω

   Text in Illustration 

   *a	Front view of wire harness connector (to No. 2 Integration Relay)
   *b	Rear view of wire harness connector (to Power Management Control ECU)

   NOTICE:

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

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   A19-4 (FCTL) - Body ground	Power switch off	Below 1 V
   	Power switch on (IG)	Below 1 V

   NOTICE:

   If the power switch is turned on (IG) with the connector removed, DTCs will be stored. If the DTCs are output, clear the DTCs using the intelligent tester (Click here).

5. Connect the power management control ECU connector (Click here).
   

6. Install the No. 2 integration relay (Click here).
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   

2. Disconnect connector H3 from the power management control ECU (Click here).
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   H3-5 (E01) - Body ground	Power switch off	Below 1 Ω

   Text in Illustration 

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

   NOTICE:

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

4. Connect the power management control ECU connector (Click here).
   

5. Connect the cable to the negative (-) auxiliary battery terminal.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   

2. Disconnect connector H4 from the power management control ECU (Click here).
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   H4-5 (E02) - Body ground	Power switch off	Below 1 Ω

   Text in Illustration 

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

   NOTICE:

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

4. Connect the power management control ECU connector (Click here).
   

5. Connect the cable to the negative (-) auxiliary battery terminal.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   

2. Remove the No. 2 integration relay (Click here).
   

3. Disconnect connector Q14 from the battery cooling blower assembly.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   1A-8 - Q14-1 (IG0)	Power switch off	Below 1 Ω

   Text in Illustration 

   *a	Front view of wire harness connector (to Battery Cooling Blower Assembly)
   *b	Front view of wire harness connector (to No. 2 Integration Relay)

5. Install the No. 2 integration relay (Click here).
   

6. Connect the battery cooling blower assembly connector.
   

7. Connect the cable to the negative (-) auxiliary battery terminal.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

1. Replace the No. 2 integration relay (Click here).
   

NEXT

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   

2. Remove the No. 2 integration relay (Click here).
   

3. Disconnect connector Q14 from the battery cooling blower assembly.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   Q14-1 (IG0) - Terminals other than 1A-8 and 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	Front view of wire harness connector (to No. 2 Integration Relay)

5. Install the No. 2 integration relay (Click here).
   

6. Connect the battery cooling blower assembly connector.
   

7. Connect the cable to the negative (-) auxiliary battery terminal.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

CAUTION:

Be sure to wear insulated gloves.

1. Disconnect connector Q14 from the battery cooling blower assembly.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   Q14-1 (IG0) - Q14-4 (GND0) and body ground	Power switch off	10 kΩ or higher

   Text in Illustration 

   *a	Component without harness connected (Battery Cooling Blower Assembly)

3. Connect the battery cooling blower assembly connector.
   

NG	REPLACE BATTERY COOLING BLOWER ASSEMBLY (Click here)

OK
RECOVERY TO NORMAL