P0A9C
HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A9C-123: Hybrid Battery Temperature Sensor "A"
DTC P0A9C-123 - Hybrid Battery Temperature Sensor "A"
DESCRIPTION
Refer to the description for DTC P0A9D-123 P0A9D.
MONITOR DESCRIPTION
If the temperature indicated by the battery temperature sensor is lower than the standard level (open), or is higher than the standard level (short), the battery smart unit interprets this as a sensor malfunction. If the battery smart unit detects that HV battery temperature is out of a normal range or its value is abnormal, the hybrid vehicle control ECU illuminates the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
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 CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT)
CAUTION: Be sure to wear insulated gloves.
(a) Check the connection of connector z37 of the battery smart unit.
OK:
The connector is connected securely and there are no contact problems.
HINT: For the removal and installation procedures related to the battery smart unit connector inspection, Components.
NG -- CONNECT SECURELY
OK -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR)
(a) Check the connection of the battery 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 HV BATTERY (BATTERY TEMPERATURE SENSOR)
CAUTION: Be sure to wear insulated gloves.
(a) Place the HV battery on the luggage compartment floor mat Components.
(b) Connect the battery pack wire connector in the luggage compartment Components.
(c) Connect the frame wire to the luggage room junction block.
(d) Insulate the AMD terminal of the removed wire with insulating tape to prevent a short to body ground.
(e) Connect the intelligent tester or Techstream to the DLC3.
(f) Turn the power switch on (IG).
(g) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST / BATT TEMP 1 to 4.
(2) Techstream - Select: Powertrain / Hybrid Control / Data List / Temp of Batt TB 1 to 4.
HINT: "Temp of Batt TB 1 to 4" in the Data List represents the battery temperature sensor 0 to 3.
(h) Read the data list.
HINT: Record the 4 displayed "Temp of Batt TB" values (1 to 4) in order to compare the data list values with the values to be actually measured at connector z37 of the battery smart unit.
(i) Disconnect connector z37 from the battery smart unit.
(j) Measure the resistance according to the value(s) in the table below.
Standard resistance (Battery temperature sensor 0):
Standard resistance (Battery temperature sensor 1):
Standard resistance (Battery temperature sensor 2):
Standard resistance (Battery temperature sensor 3):
NOTE: If time passes after confirming the temperatures in the data list, the HV battery internal temperature may change.
(k) Compare the recorded "Temp of Batt TB" values and the actual measured values.
OK:
There is almost no difference between the recorded "Temp of Batt TB" values and the actual measured values.
NG -- REPLACE BATTERY SMART UNIT
OK -- REPLACE HV BATTERY