P0BC4
HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A9D-123,P0A9E-123,P0AC7-123,P0AC8-123,P0ACC-123,P0ACD-123,P0AEA-123,P0AEB-123,P0BC4-123,P0BC5-123,P0C35-123,P0C36-123: Hybrid Battery Temperature Sensor "A" Circuit Low
P0C36-123 - Hybrid Battery Temperature Sensor "F" 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 6" 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.
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 6
HINT
Compare the temperature of the 6 battery temperature sensors to determine the sensor with the malfunction (Temp of Batt TB1 to TB6).
NEXT -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION
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 battery cover Removal.
(d) Check the connections of the z29 connector of the battery smart unit.
OK:
The connectors are connected securely and there are no contact problems.
Text in Illustration
(e) Install the battery cover 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 P0ABF
NG -- CHECK HYBRID BATTERY JUNCTION BLOCK ASSEMBLY
OK -- REPLACE BATTERY SMART UNIT Components
6. CHECK HYBRID BATTERY JUNCTION BLOCK ASSEMBLY P0A85
NG -- CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY)
OK -- REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Components
7. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY) P0A85
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BATTERY SMART UNIT Components
8. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) P0A85
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HV BATTERY ASSEMBLY Components