HYBRID BATTERY SYSTEM, Diagnostic DTC:P0AAE-123, P0AAF-123
| DTC Code | DTC Name |
|---|---|
| P0AAE-123 | Hybrid Battery Pack Air Temperature Sensor "A" Circuit Low |
| P0AAF-123 | Hybrid Battery Pack Air Temperature Sensor "A" Circuit High |
DESCRIPTION
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The intake 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 intake air temperature sensor are the same as those of the battery temperature sensors. (For details, Click here.) The battery smart unit uses signals from the intake air temperature sensor to control the air volume of the battery cooling blower assembly.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0AAE-123 | When the temperature indicated by the intake air temperature sensor is 95°C (203°F) or more (short to GND). |
|
| P0AAF-123 | When the temperature indicated by the intake air temperature sensor is -45°C (-49°F) or less (open circuit or short to +B). |
Tech Tips
After confirming that DTCs P0AAE-123 and P0AAF-123 are output, use the intelligent tester to check "Inhaling Air Temp" in the hybrid control system data list.
| Displayed Temperature | Malfunction |
|---|---|
| -45°C (-49°F) or less | Open circuit or short to +B |
| 95°C (203°F) or more | Short to GND |
INSPECTION PROCEDURE
CAUTION:
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Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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.
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After disconnecting 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.
Tech Tips
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
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CHECK FOR DTCS (DTC P0AFC-123 IS OUTPUT)
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Connect the intelligent tester to the DLC3.
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Turn the power switch on (IG).
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Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
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Check if DTCs are output.
Result Result Proceed to P0AFC-123 is not output. A P0AFC-123 is output. B
B 
GO TO DTC (P0AFC-123) Click here
A 
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CHECK CONNECTOR CONNECTION CONDITION (INTAKE AIR TEMPERATURE SENSOR)
CAUTION:
Be sure to wear insulated gloves.
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Remove the HV battery Click here.
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Check the connection of the intake air temperature sensor connector (intermediate connector).
OK The connector is connected securely and there are no contact problems.
NG
CONNECT SECURELY
OK
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CHECK CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT)
CAUTION:
Be sure to wear insulated gloves.
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Check the connection of connector z87 of the battery smart unit.
OK The connector is connected securely and there are no contact problems. Tech Tips
For the removal and installation procedures related to the battery smart unit connector inspection, Click here.
NG
CONNECT SECURELY
OK
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CHECK HV BATTERY (INTAKE AIR TEMPERATURE SENSOR)
CAUTION:
Be sure to wear insulated gloves.
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Disconnect the z87 battery smart unit connector.
Tech Tips
For the removal and installation procedures related to the battery smart unit connector inspection, Click here.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition z87-1 (TC0) - z87-11 (GC0) Thermistor temperature: 0°C (32°F) 27.3 to 28.4 kΩ z87-1 (TC0) - z87-11 (GC0) Thermistor temperature: 25°C (77°F) 9.9 to 10.1 kΩ z87-1 (TC0) - z87-11 (GC0) Thermistor temperature: 40°C (104°F) 5.72 to 5.90 kΩ -
Disconnect the z36 battery smart unit connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition z87-7 (TB0) - z36-1 (IGCT) Always 10 kΩ or higher z87-7 (TB0) - z36-5 (GND) Always 10 kΩ or higher z87-6 (TB1) - z36-1 (IGCT) Always 10 kΩ or higher z87-6 (TB1) - z36-5 (GND) Always 10 kΩ or higher z87-5 (TB2) - z36-1 (IGCT) Always 10 kΩ or higher z87-5 (TB2) - z36-5 (GND) Always 10 kΩ or higher z87-4 (TB3) - z36-1 (IGCT) Always 10 kΩ or higher z87-4 (TB3) - z36-5 (GND) Always 10 kΩ or higher z87-3 (TB4) - z36-1 (IGCT) Always 10 kΩ or higher z87-3 (TB4) - z36-5 (GND) Always 10 kΩ or higher z87-2 (TB5) - z36-1 (IGCT) Always 10 kΩ or higher z87-2 (TB5) - z36-5 (GND) Always 10 kΩ or higher -
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition z87-1 (TC0) - z36-1 (IGCT) Always 10 kΩ or higher z87-1 (TC0) - z36-5 (GND) Always 10 kΩ or higher
NG 
CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR) Click here
OK 
REPLACE BATTERY SMART UNIT Click here
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CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR)
CAUTION:
Be sure to wear insulated gloves.
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Disconnect the A battery temperature sensor connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition z87-7 (TB0) - A-2 Always Below 1 Ω z87-6 (TB1) - A-3 Always Below 1 Ω z87-5 (TB2) - A-4 Always Below 1 Ω z87-1 (TC0) - A-1 Always Below 1 Ω z87-17 (GB0) - A-6 Always Below 1 Ω z87-16 (GB1) - A-7 Always Below 1 Ω z87-15 (GB2) - A-8 Always Below 1 Ω z87-11 (GC0) - A-5 Always Below 1 Ω Standard Resistance Tester Connection Condition Specified Condition z87-7 (TB0) - Body ground and other terminals Always 10 kΩ or higher z87-6 (TB1) - Body ground and other terminals Always 10 kΩ or higher z87-5 (TB2) - Body ground and other terminals Always 10 kΩ or higher z87-1 (TC0) - Body ground and other terminals Always 10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE HV BATTERY Click here
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