HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AFC00, P0AFC16, P0AFC96, P308A12

DTC Code	DTC Name
P0AFC00	Hybrid/EV Battery Sensor Module
P0AFC16	Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold
P0AFC96	Hybrid/EV Battery Sensor Module Component Internal Failure
P308A12	Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery

DESCRIPTION

If the battery voltage sensor detects an internal malfunction, it sends an error signal to the hybrid vehicle control ECU. When the hybrid vehicle control ECU receives the error signal from the battery voltage sensor, the ECU warns the driver and performs fail-safe control.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0AFC00	Hybrid/EV Battery Sensor Module	The hybrid vehicle control ECU receives an error signal from the battery voltage sensor. (1 trip detection logic)	Battery voltage sensor Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AFC16	Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold	The hybrid vehicle control ECU receives an error signal from the battery voltage sensor. (1 trip detection logic)	Battery voltage sensor Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AFC96	Hybrid/EV Battery Sensor Module Component Internal Failure	The hybrid vehicle control ECU receives an error signal from the battery voltage sensor. (1 trip detection logic)	Battery voltage sensor Wire harness or connector	Comes on	Master Warning Light: Comes on
P308A12	Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery	The hybrid vehicle control ECU receives an error signal from the battery voltage sensor. (1 trip detection logic)	Battery voltage sensor Wire harness or connector	Comes on	Master Warning Light: Comes on

Related Data List
DTC No.	Data List
P0AFC00	Hybrid Battery Sensor Module Power Supply Voltage
P0AFC16
P0AFC96
P308A12

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the GTS on.
With power switch on (IG) and wait for 10 seconds or more.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
Tech Tips
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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 removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE

CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

Check that the service plug grip is not installed.
Note
- Check and record any DTCs, INF codes and freeze frame data, then disconnect the cable from the negative (-) auxiliary battery terminal.
- 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.
Remove the No. 1 hybrid battery exhaust duct.

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Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

*a	Component with harness connected (Battery Voltage Sensor)

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

Standard Voltage

Tester Connection	Condition	Specified Condition
M35-1 (IGCT) - M35-5 (GND)	Power switch on (IG)	11 to 14 V

Note

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.

Install the No. 1 hybrid battery exhaust duct.

Result

Proceed to
OK
NG

REPLACE BATTERY VOLTAGE SENSOR Click here

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BODY GROUND)

CAUTION:

Be sure to wear insulated gloves.

Check that the service plug grip is not installed.

Note

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.
Remove the No. 1 hybrid battery exhaust duct.

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*a	Component with harness connected (Battery Voltage Sensor)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
M35-5 (GND) - Body ground	Power switch off	Below 1 Ω

Install the No. 1 hybrid battery exhaust duct.

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (IGCT NO. 2 FUSE - BATTERY VOLTAGE SENSOR)

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR - BODY GROUND)