RM38T0EC _51 Engine / Hybrid System _144957 HYBRID / BATTERY CONTROL _0604234 HYBRID BATTERY SYSTEM C

HYBRID / BATTERY CONTROL  HYBRID BATTERY SYSTEM  P0AAC11  Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground  P0AAC15  Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open  


DESCRIPTION

The inlet air temperature sensor (HV battery) is mounted on the HV battery. The resistance of the sensor varies in accordance with changes in the intake air temperature. The characteristics of the inlet air temperature sensor are the same as those of the battery temperature sensors (Click here Engine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID BATTERY SYSTEM>P0A9B11). The battery ECU assembly uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P0AAC11 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground The inlet air temperature sensor 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. 3 HV battery pack wire

·

Battery ECU assembly

·

Wire harness or connector


Does not come on Master Warning:
Comes on 		SAE Code: P0AAE
P0AAC15 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open The inlet air temperature sensor output voltage is higher than the standard value (short to +B or open) and the detected temperature is lower than the specified value.
(1 trip detection logic)
·

No. 3 HV battery pack wire

·

Battery ECU assembly

·

Wire harness or connector


Does not come on Master Warning:
Comes on 		SAE Code: P0AAF

HINT:

After checking for the above DTCs, check the hybrid system Data List item "Hybrid/EV Battery Cooling Fan Intake Air Temperature 1" using the GTS.

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


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 hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID BATTERY SYSTEM>UTILITY


1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for 2 minutes or more.

5.

Turn the ignition switch to ON and turn the GTS on.

6.

With ignition switch ON and wait for 5 seconds or more.

7.

Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.

8.

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, perform driving pattern again.




WIRING DIAGRAM

A512990E10
4.917,2.615 7.063,2.813 2.146,0.198 10 false Battery ECU Assembly 2.281,2.51 3.719,3.177 1.438,0.667 10 false No. 3 HV Battery Pack Wire (Inlet Air Temperature Sensor) 2.292,2.333 2.719,2.531 0.427,0.198 10 false O221 4.906,2.448 5.542,2.708 0.635,0.26 10 false O217 4.521,1.677 4.906,1.896 0.385,0.219 10 false 2 4.708,0.938 5.094,1.177 0.385,0.24 10 false TC0 4.708,1.677 5.094,1.896 0.385,0.219 10 false GC0 3.24,1.677 3.625,1.896 0.385,0.219 10 false 1 3.25,0.938 3.635,1.156 0.385,0.219 10 false 2 2.594,0.938 2.979,1.156 0.385,0.219 10 false 2 4.5,0.938 4.885,1.156 0.385,0.219 10 false 1 2.594,1.677 2.979,1.896 0.385,0.219 10 false 1

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID BATTERY SYSTEM>PRECAUTION


NOTICE:
·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the auxiliary battery

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




PROCEDURE

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

Check for DTCs.

Powertrain > HV Battery > Trouble Codes
50001 398
Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
"P0AAC11 or P0AAC15" 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


b.

Turn the ignition switch off.



A

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

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

C

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


2.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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.
A517709N06
1.083,0.25 1.583,0.5 0.5,0.25 1.135,0.271 1.521,0.479 0.385,0.208 10 true O217

Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

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



Result:
Proceed to
OK
NG



OK

3.CHECK INSTALLATION OF INLET AIR TEMPERATURE SENSOR

NG

CONNECT SECURELY

3.CHECK INSTALLATION OF INLET AIR TEMPERATURE SENSOR
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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the high voltage connector from the HV battery junction block assembly.

NOTICE:

Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.



c.
A517707

Visually check the installation condition of the inlet air temperature sensor.

Result:
Result Proceed to
The inlet air temperature sensor is installed in the correct location and its claws are engaged securely. A
The claws of the inlet air temperature sensor are damaged. B
The inlet air temperature sensor is not installed correctly, but its claws are not damaged. C



d.

Reconnect the high voltage connector to the HV battery junction block assembly.



A

4.CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

B

REPLACE NO. 3 HV BATTERY PACK WIRE

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HV BATTERY>REMOVAL


C

INSTALL PARTS CORRECTLY

4.CHECK BATTERY ECU 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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

NOTICE:

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



c.

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


d.

Turn the ignition switch to ON.


e.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
O221-2 - O221-1 Ignition switch ON 4.5 to 5.5 V


NOTICE:

Be sure not to damage or deform the terminal being inspected.



f.

Turn the ignition switch off.


g.

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


h.

Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connectors.


Result:
Proceed to
OK
NG



OK

5.CHECK NO. 3 HV BATTERY PACK WIRE (INLET AIR TEMPERATURE SENSOR)

NG

6.CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 3 HV BATTERY PACK WIRE)
5.CHECK NO. 3 HV BATTERY PACK WIRE (INLET AIR TEMPERATURE SENSOR)
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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

NOTICE:

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



c.
A512992C09
0.083,0.833 0.583,1.083 0.5,0.25 0.063,0.083 0.375,0.281 0.313,0.198 10 false *a 0.167,0.865 0.625,1.063 0.458,0.198 10 false O221
*a Component without harness connected
(No. 3 HV Battery Pack Wire (Inlet Air Temperature Sensor))


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

Standard Resistance:
Tester Connection Condition Specified Condition
O221-1 - O221-2 Ignition switch off
0 to 10°C (32 to 50°F) 		17.67 to 27.83 kΩ
Ignition switch off
10 to 20°C (50 to 68°F) 		11.94 to 18.25 kΩ
Ignition switch off
20 to 30°C (68 to 86°F) 		8.21 to 12.24 kΩ
Ignition switch off
30 to 40°C (86 to 104°F) 		5.73 to 8.41 kΩ
Ignition switch off
40 to 50°C (104 to 122°F) 		4.08 to 5.91 kΩ



d.

Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.


Result:
Proceed to
OK
NG



OK

REPLACE HV BATTERY

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HV BATTERY>REMOVAL


NG

REPLACE NO. 3 HV BATTERY PACK WIRE

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HV BATTERY>REMOVAL


6.CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 3 HV BATTERY PACK WIRE)
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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the battery ECU assembly connector.


c.

Disconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.


d.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
O217-1 (TC0) - O221-2 Ignition switch off Below 1 Ω
O217-2 (GC0) - O221-1 Ignition switch off Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
O217-1 (TC0) or O221-2 - Body ground and other terminals Ignition switch off 10 kΩ or higher
O217-2 (GC0) or O221-1 - Body ground and other terminals Ignition switch off 10 kΩ or higher



e.

Reconnect the battery ECU assembly connector.


f.

Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.


Result:
Proceed to
OK
NG



OK

REPLACE BATTERY ECU ASSEMBLY

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>BATTERY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR