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P0AD2





P313 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0AD2-123: Hybrid Battery Pack Cooling Fan 3 Control Circuit Low
P0AD2-123 - Hybrid Battery Pack Cooling Fan 3 Control Circuit Low

DESCRIPTION

- Refer to the Description for DTC P0A84-123 P0A84.





WIRING DIAGRAM

Refer to the Wiring Diagram for DTC P0A84-123 P0A84.

INSPECTION PROCEDURE

CAUTION:
- 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.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT
At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT) P0A7F

B -- GO TO DTC P0AFC-123 P0AFC-123
A -- Continue to next step.

2. CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Read output DTCs Hybrid Battery System.

Result





B -- INSPECT FUSE (BATT FAN)
A -- Continue to next step.

3. CHECK BATTERY COOLING BLOWER ASSEMBLY (NO. 2) P0AD0

B -- REPLACE BATTERY COOLING BLOWER ASSEMBLY (NO. 2) Removal
A -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATTERY COOLING BLOWER ASSEMBLY [NO. 2])

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect the O47 connector from the battery cooling blower assembly (No. 2).





(e) Remove the BATT FAN relay.





Text in Illustration





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





Standard Resistance:





Text in Illustration





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

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

5. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - BATTERY COOLING BLOWER ASSEMBLY [NO. 2])

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect the O47 connector from the battery cooling blower assembly (No. 2).





(e) Disconnect the z18 connector from the battery smart unit.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE)
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY [NO. 2] - BODY GROUND)

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect the O47 connector from the battery cooling blower assembly (No. 2).





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





Standard Resistance:





Text in Illustration





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

7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY COOLING BLOWER ASSEMBLY [NO. 2])

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect the O47 connector from the battery cooling blower assembly (No. 2).





(e) Disconnect the A65 connector from the hybrid vehicle control ECU Removal.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





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

8. CHECK HYBRID VEHICLE CONTROL ECU

(a) Using an oscilloscope, measure the waveform according to the condition in the table below.









OK:

The waveform in the illustration can be measured.

HINT
- A and B in the DUTY waveform shown in the illustration vary depending on the cooling fan mode.
- Duty command value is influenced by variance in fan motors and the change of power supply voltage.
- Measure when the vehicle comes to a stop and an idling stop.

Text in Illustration





NG -- REPLACE HYBRID VEHICLE CONTROL ECU Removal

OK -- REPLACE BATTERY SMART UNIT Removal

9. INSPECT FUSE (BATT FAN) P0A84

NG -- CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BODY GROUND)
OK -- Continue to next step.

10. INSPECT RELAY (BATT FAN) P0A84

NG -- REPLACE RELAY (BATT FAN)
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATT FAN FUSE) P0A84

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

12. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATTERY COOLING BLOWER ASSEMBLY [NO. 2])

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the BATT FAN relay.





Text in Illustration





(d) Remove the battery cover Removal.

(e) Disconnect the O47 connector from the battery cooling blower assembly (No. 2).





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





Standard Resistance:





Text in Illustration





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

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

13. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATT FAN RELAY) P0A84

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

14. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND) P0A84

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

15. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND) P0A84

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Removal

16. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BODY GROUND) P0A84

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

17. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY [NO. 2] - BODY GROUND)

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect each of the 3 battery cooling blower assembly connectors.





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





Standard Resistance:





Text in Illustration





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

18. CHECK BATTERY COOLING BLOWER ASSEMBLY P0A84

NG -- REPLACE BATTERY COOLING BLOWER ASSEMBLY (MALFUNCTIONING BATTERY COOLING BLOWER ASSEMBLY)

OK -- REPLACE FUSE (BATT FAN)

19. REPLACE BATTERY COOLING BLOWER ASSEMBLY (MALFUNCTIONING BATTERY COOLING BLOWER ASSEMBLY)

(a) Replace the battery cooling blower assembly (malfunctioning battery cooling blower assembly) Removal.

NEXT -- REPLACE FUSE (BATT FAN)

20. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- REPLACE FUSE (BATT FAN)

21. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE)

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

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

(c) Remove the battery cover Removal.

(d) Disconnect the Oz3 connector from the No. 2 battery pack wire.





(e) Disconnect the z18 connector from the battery smart unit.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 2 BATTERY PACK WIRE)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR
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