P0A99

HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A99-123: Hybrid Battery Pack Cooling Fan 2 Control Circuit Low
P0A99-123 - Hybrid Battery Pack Cooling Fan 2 Control Circuit Low

DESCRIPTION

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





INSPECTION PROCEDURE

NOTICE:
After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE

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

B -- GO TO DTC CHART
A -- Continue to next step.

2. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Read output DTCs Hybrid Battery System.

Result:





(d) Remove the Techstream from the DLC3.

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

3. CHECK BATTERY COOLING BLOWER ASSEMBLY (NO. 1) P0A97

B -- REPLACE BATTERY COOLING BLOWER ASSEMBLY (NO. 1) Components
A -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATTERY COOLING BLOWER ASSEMBLY (NO. 1))

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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Disconnect the P49 connector from the battery cooling blower assembly (No. 1).





(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.

(g) Install the BATT FAN relay to the engine room relay block No. 3.

(h) Connect the P49 connector to the battery cooling blower assembly (No. 1).

(i) Install the battery cover Installation.

(j) Connect the cable to the negative (-) battery terminal.

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. 1))

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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Disconnect the P49 connector from the battery cooling blower assembly (No. 1).





(e) Remove the battery smart unit Removal.

HINT
Disconnect only the z30 connector of 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





(g) Connect the P49 connector to the battery cooling blower assembly (No. 1).

(h) Install the battery smart unit Installation.

(i) Install the battery cover.

(j) Connect the cable to the negative (-) battery terminal.

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

6. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY (NO. 1) - 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Disconnect the P49 connector from the battery cooling blower assembly (No. 1).





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





Standard Resistance:





Text in Illustration





(f) Connect the P49 connector to the battery cooling blower assembly (No. 1).

(g) Install the battery cover Installation.

(h) Connect the cable to the negative (-) battery terminal.

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

7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COOLING BLOWER (NO. 1))

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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Disconnect the P49 connector from the battery cooling blower assembly (No. 1).





(e) Disconnect the A80 connector from the power management 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





(g) Connect the A80 connector to the power management control ECU Installation.

(h) Connect the P49 connector to the battery cooling blower assembly (No. 1).

(i) Install the battery cover Installation.

(j) Connect the cable to the negative (-) battery terminal.

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

8. CHECK POWER MANAGEMENT CONTROL ECU

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









Standard:

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





(b) Remove the oscilloscope from the power management control ECU.

NG -- REPLACE POWER MANAGEMENT CONTROL ECU Components

OK -- REPLACE BATTERY SMART UNIT Components

9. CHECK FUSE (BATT FAN) P0A84

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

10. CHECK 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 -- REPLACE NO. 3 ENGINE ROOM RELAY BLOCK
OK -- Continue to next step.

12. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - BATTERY COOLING BLOWER ASSEMBLY (NO. 1))

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 power 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 P49 connector from the battery cooling blower assembly (No. 1).

(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.

(g) Connect the P49 connector to the battery cooling blower assembly (No. 1).

(h) Install the battery cover Installation.

(i) Install the BATT FAN relay.

(j) Connect the cable to the negative (-) battery terminal.

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

13. CHECK HARNESS AND CONNECTOR (BATT FAN RELAY - POWER MANAGEMENT CONTROL ECU) P0A84

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

14. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) P0A84

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

15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) P0A84

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER MANAGEMENT CONTROL ECU Components

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 - 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 power 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





(f) Connect each of the 3 battery cooling blower assembly connectors Installation.

(g) Install the battery cover.

(h) Connect the cable to the negative (-) battery terminal.

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 (MALFUNCTION BATTERY COOLING BLOWER ASSEMBLY)

OK -- REPLACE FUSE (BATT FAN)

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

HINT
Components

NEXT -- REPLACE FUSE (BATT FAN)

20. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- REPLACE FUSE (BATT FAN)