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 [10/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. 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 [10/2022 - 10/2024] , or Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ]

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 appropriate service information because this may cause a malfunction.

Check that the No. 1 HV battery intake filter, No. 2 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 [10/2022 - ]

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
z34-6 (SI1) - z34-7 (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 [10/2022 - ]

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 [10/2022 - ]

Result:

NG

REPLACE BATTERY VOLTAGE SENSOR. Refer to REMOVAL [10/2022 - ]
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 [10/2022 - ]

Result:

NG

REPLACE BATTERY VOLTAGE SENSOR. Refer to REMOVAL [10/2022 - ]