P0A84

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A84-123: Hybrid Battery Pack Cooling Fan 1
P0A84-123 - Hybrid Battery Pack Cooling Fan 1

DESCRIPTION

- The speed of the battery cooling blower assembly is controlled by the hybrid vehicle control ECU. Battery cooling blower assembly power is supplied when the FCTL terminal of the hybrid vehicle control ECU turns on the battery blower relay. The hybrid vehicle 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 hybrid vehicle control ECU as a monitor signal using serial communication via the battery smart unit.









WIRING DIAGRAM





CAUTION:
- Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:

DTC P0A1F-123 is output.

YES -- GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC
NO -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

HINT
Check Cooling Fan Mode 1 in the data list using the Techstream. If the cooling fan mode is 6, it is not necessary to perform the active test.

(d) Select air volume mode 6 in the Battery Cooling Fan active test to operate the battery cooling blower assembly.

(e) Check that the fan operates and air is sucked into the inlet duct of the package tray trim panel assembly.

HINT
The cooling fan may not stop even when turning the cooling fan off in the Battery Cooling Fan active test. This is due to HV system control and not a malfunction.

OK:

The fan operates.

OK -- CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BATTERY SMART UNIT)
NG -- Continue to next step.

3. CHECK FUSE (BATT FAN)

(a) Remove the BATT FAN fuse from the engine room R/B No. 1.





(b) Measure the resistance.

Standard resistance:

Below 1 Ohms

OK -- CHECK BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE)
NG -- Continue to next step.

4. REPLACE FUSE (BATT FAN)

NEXT -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BODY GROUND)

(a) Remove the BATT FAN relay from the engine room R/B No. 1.

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





Standard resistance (Check for short):





NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BODY GROUND)

(a) Remove the luggage compartment front trim cover Components.

(b) Remove the No. 6 HV battery intake duct Components.

(c) Disconnect the battery cooling blower assembly connector.

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





Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BATTERY COOLING BLOWER ASSEMBLY Components

7. CHECK BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE)

(a) Install the BATT FAN fuse.

(b) Remove the luggage compartment front trim cover Components.

(c) Remove the No. 6 HV battery intake duct Components.

(d) Connect the Techstream to the DLC3.

(e) Turn the power switch on (IG).

(f) Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

HINT
Check Cooling Fan Mode1 in the data list using the Techstream. If the cooling fan mode is 6, it is not necessary to perform the active test.

(g) Select air volume mode 6 in the Battery Cooling Fan active test to operate the battery cooling blower assembly.

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





Standard voltage:





OK -- CHECK BATTERY COOLING BLOWER ASSEMBLY
NG -- Continue to next step.

8. INSPECT RELAY (BATT FAN)

(a) Remove the BATT FAN relay from the engine room R/B No. 1.

(b) Resistance check





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

Standard resistance:





NG -- REPLACE RELAY (BATTERY BLOWER)
OK -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BATT FAN RELAY)

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





Standard resistance (Check for open):





NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

10. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect connector E84 from the hybrid vehicle control ECU.

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





Standard resistance (Check for open):





NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

(c) Turn the power switch on (IG).

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

Standard voltage:





NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATTERY COOLING BLOWER ASSEMBLY)

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





Standard resistance (Check for open):





NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the fuse holder or terminals.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Service and Repair

12. CHECK BATTERY COOLING BLOWER ASSEMBLY

(a) Install the BATT FAN fuse to the engine room R/B No. 1.

(b) Connect the battery cooling blower assembly connector.

(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (IG).

(e) Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

(f) Select Cooling Fan Mode 0 in the Driving the Battery Cooling Fan active test to stop the battery cooling blower assembly.

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





Standard voltage:





HINT
Perform this inspection with the battery cooling blower assembly connector connected.

NG -- REPLACE BATTERY COOLING BLOWER ASSEMBLY Components
OK -- Continue to next step.

13. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the battery cooling blower assembly connector.





(b) Disconnect connector A54 from the hybrid vehicle control ECU.

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

Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Turn the power switch on (IG).

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

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Service and Repair

14. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BATTERY SMART UNIT)

CAUTION:
Be sure to wear insulated gloves.

(a) Remove the service plug grip. Removal

(b) Remove the luggage compartment front trim cover. Removal

(c) Remove the No. 6 HV battery intake duct Components.

(d) Disconnect the frame wire. Removal

(e) Remove the battery bracket sub-assembly. Removal

(f) Disconnect connector N2 from the battery smart unit.

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





Standard resistance (Check for open):





Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

15. CHECK BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE)

(a) Connect connector N2 from the battery smart unit.

(b) Connect the frame wire. Components

(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (IG).

(e) Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

HINT
Check Cooling Fan Mode1 in the data list using the Techstream. If the cooling fan mode is 6, it is not necessary to perform the active test.

(f) Select the following menu items: User Data / VMF Fan Motor Voltage1.

(g) Select each air volume mode (1 to 6) in the Battery Cooling Fan active test to operate the battery cooling blower assembly.

(h) While the cooling fan is operating, compare the value in the user data (VMF Fan Motor Voltage1) with the voltage value that was actually measured at the battery cooling blower assembly connector.





Standard:





OK:

Difference of voltage is 1 V or less.

HINT
Compare the values in each air volume mode (1 to 6).

NG -- REPLACE BATTERY SMART UNIT Components

OK -- REPLACE BATTERY COOLING BLOWER ASSEMBLY Components