DTC    P0A9D-123    Hybrid Battery Temperature Sensor "A" Circuit Low

DTC    P0A9E-123    Hybrid Battery Temperature Sensor "A" Circuit High

DTC    P0AC7-123    Hybrid Battery Temperature Sensor "B" Circuit Low

DTC    P0AC8-123    Hybrid Battery Temperature Sensor "B" Circuit High

DTC    P0ACC-123    Hybrid Battery Temperature Sensor "C" Circuit Low

DTC    P0ACD-123    Hybrid Battery Temperature Sensor "C" Circuit High

for Preparation Click here


DESCRIPTION

  1. Refer to the description for DTC P0A9C-123 (Click here).

DTC No.
DTC Detection Condition
Trouble Area
P0A9D-123
P0A9E-123
P0AC7-123
P0AC8-123
P0ACC-123
P0ACD-123
When the temperature of the battery temperature sensor is less than the standard value (open) or higher than the standard value (shorted) (1 trip detection).
  1. HV battery
  2. Battery smart unit
  3. Wire harness or connector
  4. Hybrid battery junction block assembly

HINT:
After confirming that a DTC is output, use the intelligent tester to check "Temp of BATT TB 1 to 3" in the hybrid vehicle control system ECU data list.

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

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9C-123 (Click here).

INSPECTION PROCEDURE

CAUTION:
  1. Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. 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.
  2. After removing 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 (Click here).

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

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).

1.CHECK DTC OUTPUT (HV)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Powertrain / Hybrid Control / DTC.

  1. Check if DTCs are output.

    Result:
    Result
    		Proceed to
    P0AFC-123 is not output.
    		A
    P0AFC-123 is also output.
    		B

  1. Turn the power switch off.



B
GO TO DTC CHART (Click here)
A


2.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Powertrain / Hybrid Control / Data List / Temp of Batt TB 1 to 3.

    HINT:
    Compare the temperature of the 3 battery temperature sensors to determine the sensor with the malfunction (Temp of Batt TB1 to TB3).


NEXT


3.CHECK CONNECTOR CONNECTION CONDITION

CAUTION:
Be sure to wear insulated gloves.

  1. 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.



    A217836E15

  1. Check the connections of connector z10 of the battery smart unit.

    OK:
    The connectors are connected securely and there are no contact problems.



NG
CONNECT SECURELY
OK


4.CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR)

CAUTION:
Be sure to wear insulated gloves.

  1. 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.



    A217836E14

  1. Disconnect connectors z10 and i1 from the battery smart unit.



    A216736E05

  1. Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).
    Tester Connection 
    Tester Connection
    		Battery Temperature Sensor No.
    z10-6 (TBO) - z10-12 (GBO)
    		0
    z10-5 (TB1) - z10-11 (GB1)
    		1
    z10-4 (TB2) - z10-10 (GB2)
    		2

    Standard Resistance:
    Thermistor Temperature
    		Switch Condition
    		Specified Condition
    0°C (32°F)
    		Power switch off
    		26.7 to 27.8 kΩ
    25°C (77°F)
    		Power switch off
    		9.9 to 10.1 kΩ
    40°C (104°F)
    		Power switch off
    		5.73 to 5.92 kΩ

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Battery Smart Unit)



    A216735E10

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Standard Resistance
    z10-6 (TBO) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-6 (TBO) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-12 (GBO) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-12 (GBO) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-5 (TB1) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-5 (TB1) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-11 (GB1) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-11 (GB1) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-4 (TB2) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-4 (TB2) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-10 (GB2) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-10 (GB2) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-1 (TCO) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-1 (TCO) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher
    z10-7 (GCO) - i1-4 (IGCT)
    		Power switch off
    		10 kΩ or higher
    z10-7 (GCO) - i1-8 (GND)
    		Power switch off
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Battery Smart Unit)

  1. Connect the battery smart unit connectors.



NG
Go to step 5
OK

REPLACE BATTERY SMART UNIT (Click here)  

5.CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR)

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

  1. 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.



  1. Check the wire harness and connectors of the battery temperature sensor for abnormalities by sight and touch.


    A241555

    Specified Condition:
    There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HV BATTERY (Click here)