P09AD

HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A9D-123, P0A9E-123, P0AC7-123, P0AC8-123, P0ACC-123, P0ACD-123: Hybrid Battery Temperature Sensor "A" Circuit Low
P0ACD-123 - Hybrid Battery Temperature Sensor "C" Circuit High

DESCRIPTION

- Refer to the description for DTC P0A9C-123 P0A9C.





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





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 the normal range or its value is abnormal, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY) and turn the Techstream on.

6. Perform the universal trip.

7. Enter the following menus: Powertrain / HV / Trouble Codes.

8. Check that permanent DTCs are cleared.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

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

NOTICE:
After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE

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

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

2. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) 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 -- Continue to next step.

3. CHECK CONNECTOR CONNECTION CONDITION

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 No. 1 hybrid vehicle battery carrier bracket sub-assembly Removal.

(d) Check the connections of the z17 connector of the battery smart unit.





OK:

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

(e) Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Installation.

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

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

4. CHECK HV BATTERY ASSEMBLY (BATTERY TEMPERATURE SENSOR) P0A9C

NG -- CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR)
OK -- Continue to next step.

5. CHECK BATTERY SMART UNIT (VIB VOLTAGE)

NOTICE:
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 No. 1 hybrid vehicle battery carrier bracket sub-assembly Removal.

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

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

NOTICE:
Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set. Use the Techstream to clear the DTCs Hybrid Battery System.

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





Standard Voltage:





Text in Illustration





(g) Turn the power switch off.

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

(i) Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Installation.

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

NG -- CHECK HYBRID BATTERY JUNCTION BLOCK

OK -- REPLACE BATTERY SMART UNIT Components

6. CHECK HYBRID BATTERY JUNCTION BLOCK

NOTICE:
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 No. 1 hybrid vehicle battery carrier bracket sub-assembly Removal.

(d) Disconnect the c4 battery current sensor connector from the hybrid battery junction block.

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

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

NOTICE:
Turning the power switch on (IG) with the HV relay assembly (battery current sensor) connector disconnected causes DTC P0AC2-123 to be set. Use the Techstream to clear the DTCs Hybrid Battery System.

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





Standard Voltage:





Text in Illustration





(h) Turn the power switch off.

(i) Connect the c4 battery current sensor connector to the hybrid battery junction block.

(j) Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Installation.

NG -- CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK)

OK -- REPLACE HYBRID BATTERY JUNCTION BLOCK Components

7. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK)

NOTICE:
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 No. 1 hybrid vehicle battery carrier bracket sub-assembly Removal.

(d) Disconnect only the c1 connector of the battery smart unit.





(e) Disconnect the c4 battery current sensor connector from the hybrid battery junction block.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(g) Connect the battery smart unit connector.

(h) Connect the c4 battery current sensor connector to the hybrid battery junction block.

(i) Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Installation.

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BATTERY SMART UNIT Components

8. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) P0A9C

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HV BATTERY ASSEMBLY Components