Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GCMY |
Model Year Start: 2020 |
Model: Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0AAC11,P0AAC15; Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] |
DTC
|
P0AAC11
|
Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground
|
DTC
|
P0AAC15
|
Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open
|
DESCRIPTION
The inlet air temperature sensor (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
). The battery voltage sensor 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
|
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)
|
-
Hybrid battery thermistor (inlet air temperature sensor)
-
Battery voltage sensor
-
Wire harness or connector
|
Does not come on
|
Master Warning: Comes on
|
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)
|
-
Hybrid battery thermistor (inlet air temperature sensor)
-
Battery voltage sensor
-
Wire harness or connector
|
Does not come on
|
Master Warning: Comes on
|
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 Techstream.
Displayed Temperature
|
Malfunction
|
-45°C (-49°F) or less
|
Open or +B short circuit
|
95°C (203°F) or more
|
GND short
|
Related Data List
DTC No.
|
Data List
|
P0AAC11
|
Hybrid/EV Battery Cooling Fan Intake Air Temperature 1
|
P0AAC15
|
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
-
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 5 seconds or more.
-
Enter the following menus: Powertrain / Hybrid Control / 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 driving pattern again.
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A9B2A.
Click here
CAUTION / NOTICE / HINT
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 (HYBRID CONTROL)
|
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Result
|
Proceed to
|
P0AFC00, P0AFC96 or P308A12 is not output.
|
A
|
P0AFC00, P0AFC96 or P308A12 is output.
|
B
|
(e) Turn the power switch off.
A
|
|
|
2.
|
CHECK CONNECTOR CONNECTION CONDITION (BATTERY VOLTAGE SENSOR CONNECTION CONDITION)
|
CAUTION:
Be sure to wear insulated gloves.
(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 hybrid battery exhaust duct.
Click here
(c) Check the connections of the z10 battery voltage sensor connector.
Click here
OK:
The connector is connected securely and there are no contact problems.
Result:
|
|
(d) Install the No. 1 hybrid battery exhaust duct.
NG |
|
CONNECT SECURELY
|
OK
|
|
|
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the HV battery junction block assembly.
Click here
(c) 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) Install the HV battery junction block assembly.
C |
|
INSTALL PARTS CORRECTLY
|
A
|
|
|
4.
|
CHECK HYBRID BATTERY THERMISTOR (INLET AIR TEMPERATURE SENSOR)
|
CAUTION:
Be sure to wear insulated gloves.
(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 hybrid battery exhaust duct.
Click here
(c) Disconnect the z10 battery voltage sensor connector.
NOTICE:
Before disconnecting the connector, check that it is not loose or disconnected.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
z10-1 (TC0) - z10-7 (GC0)
|
Power switch off
0 to 10°C (32 to 50°F)
|
17.7 to 27.8 kΩ
|
Power switch off
10 to 20°C (50 to 68°F)
|
12.0 to 18.2 kΩ
|
Power switch off
20 to 30°C (68 to 86°F)
|
8.22 to 12.2 kΩ
|
Power switch off
30 to 40°C (86 to 104°F)
|
5.74 to 8.41 kΩ
|
Power switch off
40 to 50°C (104 to 122°F)
|
4.09 to 5.91 kΩ
|
NOTICE:
When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
|
|
*a
|
Rear view of wire harness connector
(to Battery Voltage Sensor)
|
|
|
(e) Disconnect the O33 battery voltage sensor connector.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
z10-1 (TC0) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-1 (TC0) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-7 (GC0) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-7 (GC0) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-4 (TB0) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-4 (TB0) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-10 (GB0) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-10 (GB0) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-3 (TB1) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-3 (TB1) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-9 (GB1) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-9 (GB1) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-2 (TB2) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-2 (TB2) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
z10-8 (GB2) - O33-1 (IGCT)
|
Power switch off
|
10 kΩ or higher
|
z10-8 (GB2) - O33-5 (GND)
|
Power switch off
|
10 kΩ or higher
|
(g) Reconnect the z10 and O33 battery voltage sensor connectors.
(h) Install the No. 1 hybrid battery exhaust duct.
NG
|
|
|
5.
|
CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR AND 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the upper No. 1 hybrid battery cover sub-assembly.
Click here
(c) Check the wire harnesses and connectors of the battery temperature sensors and inlet air temperature sensor for abnormalities by sight and touch.
Specified Condition:
There are no open or short circuits in the wire harnesses and connectors. There are no short circuits to other wire harnesses.
(d) Install the upper No. 1 hybrid battery cover sub-assembly.
NG |
|
REPAIR HARNESS OR CONNECTOR (INLET AIR TEMPERATURE SENSOR)
|
|