DTC P0A96-96: Hybrid/EV Battery Cooling Fan 2 Component Internal Failure; DTC P0A96-98: Hybrid/EV Battery Cooling Fan 2 Component or System 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.

CHECK DTC OUTPUT (HYBRID CONTROL)

Pre-procedure1

None.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Result	Proceed to
P0AFC-00, P0AFC-96 or P308A-12 is not output	A
P0AFC-00, P0AFC-96 or P308A-12 is output	B

Post-procedure1

Turn the ignition switch off.

Result:

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

Result:

See step 2

CHECK DUCT AND BLOWER

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.

Check that the No. 1 HV battery intake filter, battery cooling blower assembly, No. 1 hybrid battery intake duct and No. 2 hybrid battery intake duct are not disconnected, damaged, or clogged with foreign matter.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	No. 1 HV Battery Intake Filter	*2	No. 2 Battery Cooling Blower Assembly
*3	No. 1 Hybrid Battery Intake Duct	*4	No. 2 Hybrid Battery Intake Duct

The No. 1 HV battery intake filter, No. 1 hybrid battery intake duct, No. 2 hybrid battery intake duct and No. 2 battery cooling blower assembly are not disconnected, damaged, or clogged with foreign matter.

Result

Proceed to
OK
NG

Post-procedure1

None.

Result:

CORRECT THE PROBLEM

Result:

See step 3

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

Result

Proceed to

OK

NG

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

OK

See step 4
CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - NO. 2 BATTERY COOLING BLOWER ASSEMBLY)
See step 8

Result

Proceed to

OK

NG

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

OK

See step 5

CHECK BATTERY VOLTAGE SENSOR (GROUND SHORT CHECK)

Pre-procedure1

Remove the battery voltage sensor.
HINT:

Refer to REMOVAL [09/2023 - ]

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

Standard Resistance

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component without harness connected (Battery Voltage Sensor)

Result

Proceed to
OK
NG

Post-procedure1

Install the battery voltage sensor.

Result:

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

Result:

See step 6

READ VALUE USING GTS (HYBRID/EV BATTERY COOLING FAN 2 FREQUENCY)

See step 4

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 battery cooling blower assembly connector are 0 Hz.	A
Other than above	B

Result:

See step 8

Result:

See step 7

CHECK BATTERY VOLTAGE SENSOR
See step 5

Result

Proceed to

OK

NG

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 - ]
CHECK BATTERY VOLTAGE SENSOR (FREQUENCY)
See step 6

Result

Proceed to

OK

NG

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 - ]