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 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, P00C35.) The battery smart unit uses signals from the intake air temperature sensor to control the air volume of the battery cooling blower assembly.





HINT
After confirming that DTCs P0AAE-123 and P0AAF-123 are output, use the Techstream to check "Inhaling Air Temp" in the hybrid control system data list.





WIRING DIAGRAM





Refer to the wiring diagram for DTC P0A9D-123 P00C35.

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

PROCEDURE

1. CHECK FOR DTCS (DTC P0A1F-123 IS OUTPUT)

(a) Connect the Techstream to the DLC3.

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

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result





B -- GO TO DTC CHART (P0A1F-123) Hybrid Battery System
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (INTAKE AIR TEMPERATURE SENSOR)

CAUTION:
Be sure to wear insulated gloves.

(a) Remove the HV battery Removal.





(b) 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 -- Continue to next step.

3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT) P00C35

NG -- CONNECT SECURELY
OK -- Continue to next step.

4. CHECK HV BATTERY (INTAKE AIR TEMPERATURE SENSOR)

CAUTION:
Be sure to wear insulated gloves.

(a) Disconnect the z87 battery smart unit connector.





HINT
For the removal and installation procedures related to the battery smart unit connector inspection, Removal.

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

Standard Resistance:





(c) Disconnect the z36 battery smart unit connector.

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





Standard Resistance:





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





Standard Resistance:





NG -- CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR)

OK -- REPLACE BATTERY SMART UNIT Removal

5. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR)

CAUTION:
Be sure to wear insulated gloves.

(a) Disconnect the A battery temperature sensor connector.





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

Standard Resistance:





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HV BATTERY Removal