P0AAE

HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0AAE-123, P0AAF-123: Hybrid Battery Pack Air Temperature Sensor "A" Circuit Low
P0AAF-123 - Hybrid Battery Pack Air Temperature Sensor "A" Circuit High

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 sensor P0A9C. The battery smart unit uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.





HINT
After confirming that DTC P0AAE-123 or P0AAF-123 is output, use the Techstream to check "Inhaling Air Temp" in the HV ECU data list.





WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9D-123 P0A9D.

INSPECTION PROCEDURE

CAUTION:
- 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.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT) P0A7F

B -- GO TO DTC CHART P0AFC-123
A -- Continue to next step.

2. CHECK INSTALLATION OF INLET AIR TEMPERATURE SENSOR

CAUTION:
Be sure to wear insulated gloves and protective goggles.

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

(b) 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.

(c) Remove the hybrid battery junction block assembly Removal.

(d) Check installation of the inlet air temperature sensor

(1) Check the connection of the z37 connector of the battery smart unit.





OK:

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

Result:





(2) Visually check the installation condition of the inlet air temperature sensor.





OK:

The inlet air temperature sensor is installed in the correct location and its claws are engaged securely.

Result:





(e) Install the hybrid battery junction block assembly Installation.

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

B -- CONNECT SECURELY

C -- REPLACE HV BATTERY ASSEMBLY Components

D -- INSTALL PARTS CORRECTLY
A -- Continue to next step.

3. CHECK HV BATTERY ASSEMBLY (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR)

CAUTION:
Be sure to wear insulated gloves.

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

(b) 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.

(c) Remove the hybrid battery junction block assembly Removal.

(d) Disconnect the z15 and z37 connectors from the battery smart unit.





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





Standard Resistance:





Text in Illustration





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

Standard Resistance:





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

Standard Resistance:





(h) Connect the z15 and z37 connectors to the battery smart unit.

(i) Install the hybrid battery junction block assembly Installation.

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

NG -- CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR)

OK -- REPLACE BATTERY SMART UNIT Components

4. CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) P0A85

NG -- REPAIR HARNESS OR CONNECTOR

OK -- REPLACE HV BATTERY ASSEMBLY Components