Lexus ES: Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Battery System (for Lithium-ion Battery) / Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)

DESCRIPTION

The battery temperature sensors are provided at 6 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery ECU assembly uses the battery temperature sensors to detect the HV battery temperature. Based on the results of this detection, the battery ECU assembly controls the blower fan. (The blower fan starts when the HV battery temperature rises above a predetermined level.)

Temperature Sensor Identification Cross Reference Table:

DTC Title Sensor	Battery Temperature Sensor	Techstream Display
A	0	1
B	1	2
C	2	3
D	3	4
E	4	5
F	5	6

HINT:

Use the reference table above to determine which battery temperature sensor corresponds to each DTC. For example, sensor A in the DTC title column is battery temperature sensor 0. This sensor is displayed as Hybrid/EV Battery Temperature 1 in the Data List.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A9B11	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0A9B15	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AC511	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AC515	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0ACA11	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0ACA15	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AE811	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0AE815	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0BC211	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0BC215	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0C3311	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on
P0C3315	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master Warning Light: Comes on

Related Data List

DTC No.	Data List
P0A9B11	Hybrid/EV Battery Temperature 1 to 6
P0A9B15
P0AC511
P0AC515
P0ACA11
P0ACA15
P0AE811
P0AE815
P0BC211
P0BC215
P0C3311
P0C3315

HINT:

After checking for the above DTCs, check the hybrid system Data List item "Hybrid/EV Battery Temperature" using the Techstream.

Temperature Displayed

Malfunction

Below -45°C (-49°F)

Open or +B short circuit

95°C (203°F) or more

GND short circuit
If the vehicle as is left as is for 24 hours, the value of "Hybrid/EV Battery Temperature" will be almost the same as the ambient temperature.

Temperature Displayed	Malfunction
Below -45°C (-49°F)	Open or +B short circuit
95°C (203°F) or more	GND short circuit

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in a HV battery temperature sensor, the battery ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0A9D (INF P0A9B11), P0AC7 (INF P0AC511), P0ACC (INF P0ACA11), P0AEA (INF P0AE811), P0BC4 (INF P0BC211), P0C35 (INF P0C3311): Battery temperature sensor circuit malfunction (GND short) P0A9E (INF P0A9B15), P0AC8 (INF P0AC515), P0ACD (INF P0ACA15), P0AEB (INF P0AE815), P0BC5 (INF P0BC215), P0C36 (INF P0C3315): Battery temperature sensor circuit malfunction (open)
Required sensors/components	Battery temperature sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A9D (INF P0A9B11) is not detected

DTC P0AC7 (INF P0AC511) is not detected

DTC P0ACC (INF P0ACA11) is not detected

DTC P0C83 (INF P0C8111) is not detected

DTC P0BC4 (INF P0BC211) is not detected

DTC P0C35 (INF P0C3311) is not detected

DTC P0A9E (INF P0A9B15) is not detected

DTC P0AC8 (INF P0AC515) is not detected

DTC P0ACD (INF P0ACA15) is not detected

DTC P0AEB (INF P0AE815) is not detected

DTC P0BC5 (INF P0BC215) is not detected

DTC P0C36 (INF P0C3315) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

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.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream 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 Techstream on.
With power switch on (IG) and wait for 10 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- 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 the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
After removing the service plug grip from the HV battery, 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.
Click here

HINT:

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

*a

Without waiting for 10 minutes
When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

*a

Dealer

*b

Battery Collection Agent
- Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
Before returning the HV battery, make sure to perform a recovery inspection.
Click here
Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.
Click here
Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.
Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

NOTICE:

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.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

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

(d) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0A9B11, P0A9B15, P0AC511, P0AC515, P0ACA11, P0ACA15, P0AE811, P0AE815, P0BC211, P0BC215, P0C3311 or P0C3315" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

(e) Turn the power switch off.

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	READ VALUE USING TECHSTREAM (HYBRID/EV BATTERY TEMPERATURE)

(a) Connect the Techstream to the DLC3.

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

(d) Read the Data List.

Powertrain > HV Battery > Data List

Tester Display	Measurement Item	Range	Reference Value	Diagnostic Note
Hybrid/EV Battery Temperature 1	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly
Hybrid/EV Battery Temperature 2	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly
Hybrid/EV Battery Temperature 3	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly
Hybrid/EV Battery Temperature 4	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly
Hybrid/EV Battery Temperature 5	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly
Hybrid/EV Battery Temperature 6	HV battery temperature sensor output.	-50 to 205.9°C (-58 to 402.6°F)	Same as ambient temperature (left as is for 24 hours)	Battery temperature sensor Battery ECU assembly

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Temperature 1
Hybrid/EV Battery Temperature 2
Hybrid/EV Battery Temperature 3
Hybrid/EV Battery Temperature 4
Hybrid/EV Battery Temperature 5
Hybrid/EV Battery Temperature 6

HINT:

A malfunctioning sensor (battery temperature sensor 0, 1, 2, 3, or 5) can be determined by comparing the output temperature of the 6 battery temperature sensors.

(e) Turn the power switch off.

3.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery hose.

Click here

OK:

The connector is connected securely and there are no contact pressure problems.

(d) Install the No. 1 HV battery hose.

CONNECT SECURELY

CHECK DTC

(a) Check the DTCs that were output when the vehicle was brought to the workshop.

Result	Proceed to
"P0A9B11, P0A9B15, P0AC511, P0AC515, P0ACA11 or P0ACA15" is also output.	A
"P0AE811, P0AE815, P0BC211, P0BC215, P0C3311 or P0C3315" is also output.	B

GO TO STEP 6

5.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery hose.

Click here

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).

Tester Connection:

Tester Connection	Battery Temperature Sensor
y16-18 (TB0) - y16-17 (GB0)	0
y16-31 (TB1) - y16-30 (GB1)	1
y16-7 (TB2) - y16-6 (GB2)	2

Standard Resistance:

Thermistor Temperature	Condition	Specified Condition
0 to 10°C (32 to 50°F)	Power switch off	17.7 to 27.8 kΩ
10 to 20°C (50 to 68°F)	Power switch off	12.0 to 18.2 kΩ
20 to 30°C (68 to 86°F)	Power switch off	8.22 to 12.2 kΩ
30 to 40°C (86 to 104°F)	Power switch off	5.74 to 8.41 kΩ
40 to 50°C (104 to 122°F)	Power switch off	4.09 to 5.91 kΩ

*a	Front view of wire harness connector (to Battery ECU Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
y16-18 (TB0) - Body ground and other terminals (except y16-17 (GB0))	Power switch off	10 kΩ or higher
y16-17 (GB0) - Body ground and other terminals (except y16-18 (TB0))	Power switch off	10 kΩ or higher
y16-31 (TB1) - Body ground and other terminals (except y16-30 (GB1))	Power switch off	10 kΩ or higher
y16-30 (GB1) - Body ground and other terminals (except y16-31 (TB1))	Power switch off	10 kΩ or higher
y16-7 (TB2) - Body ground and other terminals (except y16-6 (GB2))	Power switch off	10 kΩ or higher
y16-6 (GB2) - Body ground and other terminals (except y16-7 (TB2))	Power switch off	10 kΩ or higher

(f) Connect the cable to the negative (-) auxiliary battery terminal.

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
y16-18 (TB0) - Body ground	Power switch on (IG)	Below 1 V
y16-17 (GB0) - Body ground	Power switch on (IG)	Below 1 V
y16-31 (TB1) - Body ground	Power switch on (IG)	Below 1 V
y16-30 (GB1) - Body ground	Power switch on (IG)	Below 1 V
y16-7 (TB2) - Body ground	Power switch on (IG)	Below 1 V
y16-6 (GB2) - Body ground	Power switch on (IG)	Below 1 V

NOTICE:

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.
If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

(i) Turn the power switch off.

(j) Disconnect the cable from the negative (-) auxiliary battery terminal.

(k) Reconnect the y16 battery ECU assembly connector.

(l) Install the No. 1 HV battery hose.

GO TO STEP 7

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY

6.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery hose.

Click here

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 3 to 5).

Tester Connection:

Tester Connection	Battery Temperature Sensor
y16-20 (TB3) - y16-19 (GB3)	3
y16-33 (TB4) - y16-32 (GB4)	4
y16-9 (TB5) - y16-8 (GB5)	5

Standard Resistance:

Thermistor Temperature	Condition	Specified Condition
0 to 10°C (32 to 50°F)	Power switch off	17.7 to 27.8 kΩ
10 to 20°C (50 to 68°F)	Power switch off	12.0 to 18.2 kΩ
20 to 30°C (68 to 86°F)	Power switch off	8.22 to 12.2 kΩ
30 to 40°C (86 to 104°F)	Power switch off	5.74 to 8.41 kΩ
40 to 50°C (104 to 122°F)	Power switch off	4.09 to 5.91 kΩ

*a	Front view of wire harness connector (to Battery ECU Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
y16-20 (TB3) - Body ground and other terminals (except y16-19 (GB3))	Power switch off	10 kΩ or higher
y16-19 (GB3) - Body ground and other terminals (except y16-20 (TB3))	Power switch off	10 kΩ or higher
y16-33 (TB4) - Body ground and other terminals (except y16-32 (GB4))	Power switch off	10 kΩ or higher
y16-32 (GB4) - Body ground and other terminals (except y16-33 (TB4))	Power switch off	10 kΩ or higher
y16-9 (TB5) - Body ground and other terminals (except y16-8 (GB5))	Power switch off	10 kΩ or higher
y16-8 (GB5) - Body ground and other terminals (except y16-9 (TB5))	Power switch off	10 kΩ or higher

(f) Connect the cable to the negative (-) auxiliary battery terminal.

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
y16-20 (TB3) - Body ground	Power switch on (IG)	Below 1 V
y16-19 (GB3) - Body ground	Power switch on (IG)	Below 1 V
y16-33 (TB4) - Body ground	Power switch on (IG)	Below 1 V
y16-32 (GB4) - Body ground	Power switch on (IG)	Below 1 V
y16-9 (TB5) - Body ground	Power switch on (IG)	Below 1 V
y16-8 (GB5) - Body ground	Power switch on (IG)	Below 1 V

NOTICE:

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.
If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

(i) Turn the power switch off.

(j) Disconnect the cable from the negative (-) auxiliary battery terminal.

(k) Reconnect the y16 battery ECU assembly connector.

(l) Install the No. 1 HV battery hose.

GO TO STEP 11

7.	CHECK BATTERY ECU ASSEMBLY (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery cover panel RH.

Click here

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
y14-1 (VIB) - y14-3 (GIB)	Power switch on (IG)	4.6 to 5.4 V

NOTICE:

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.

*a	Component with harness connected (HV battery junction block assembly (Battery Current Sensor))

(f) Turn the power switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Install the No. 1 HV battery cover panel RH.

REPLACE BATTERY ECU ASSEMBLY

8.	CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery cover panel RH.

Click here

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Connect the cable to the negative (-) auxiliary battery terminal.

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
y14-1(VIB) - y14-3 (GIB)	Power switch on (IG)	4.6 to 5.4 V

NOTICE:

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.
If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

*a	Front view of wire harness connector (to HV Battery Junction Block Assembly)

(g) Turn the power switch off.

(h) Disconnect the cable from the negative (-) auxiliary battery terminal.

(i) Reconnect the y14 battery current sensor connector to the HV battery junction block assembly.

(j) Install the No. 1 HV battery cover panel RH.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

9.	CHECK HARNESS AND CONNECTOR (NO. 2 HV SUPPLY STACK SUB-ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery hose.

Click here

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Disconnect the y14 battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
A-2(IB1) - y14-2(IB1)	Power switch off	Below 1 Ω
A-10(GIB) - y14-3(GIB)	Power switch off	Below 1 Ω
A-11(IB0) - y14-4(IB0)	Power switch off	Below 1 Ω
A-1(VIB) - y14-1(VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
A-2(IB1) or y14-2(IB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
A-10(GIB) or y14-3(GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
A-11(IB0) or y14-4(IB0) - Body ground and other terminals	Power switch off	10 kΩ or higher
A-1(VIB) or y14-1(VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Front view of wire harness connector

(to No. 1 HV Supply Stack Sub-assembly)

Front view of wire harness connector

(to HV Battery Junction Block Assembly (Battery Current Sensor))

(f) Reconnect the y14 battery current sensor connector to the HV battery junction block assembly.

(g) Reconnect the A No. 2 HV supply stack sub-assembly connector.

(h) Install the No. 1 HV battery hose.

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY

10.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 HV SUPPLY STACK SUB-ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) 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.

(b) Remove the No. 1 HV battery hose.

Click here

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Disconnect the y16 battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
y16-24(IB1) - A-2(IB1)	Power switch off	Below 1 Ω
y16-23(GIB) - A-10(GIB)	Power switch off	Below 1 Ω
y16-12(IB0) - A-11(IB0)	Power switch off	Below 1 Ω
y16-36(VIB) - A-1(VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
y16-24(IB1) or A-2(IB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
y16-23(GIB) or A-10(GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
y16-12(IB0) or A-11(IB0) - Body ground and other terminals	Power switch off	10 kΩ or higher
y16-36(VIB) or A-1(VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Front view of wire harness connector

(to Battery ECU Assembly)

Front view of wire harness connector

(to No. 2 HV Supply Stack Sub-assembly)

(f) Reconnect the y16 battery ECU assembly connector.

(g) Reconnect the A No. 1 HV supply stack sub-assembly connector.

(h) Install the No. 1 HV battery hose.

REPLACE BATTERY ECU ASSEMBLY

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY

11.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 HV SUPPLY STACK SUB-ASSEMBLY)

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REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY

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*a	Dealer
*b	Battery Collection Agent