P0AEB
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
- The battery temperature sensors are installed to the HV battery in 6 locations: 3 at the bottom of the upper part of the HV battery and 3 at the bottom of the lower part of the HV battery. The resistance value of the thermistor built into each battery temperature sensor varies in accordance with changes in HV battery temperature. As the HV battery temperature decreases, the thermistor resistance value increases. Conversely, as the HV battery temperature increases, the thermistor resistance value decreases. The battery smart unit uses the battery temperature sensors to detect the HV battery temperature and sends the detected value to the hybrid vehicle control ECU. Based on these detection results, the hybrid vehicle control ECU controls the battery cooling blower assembly and rear cooling unit (the battery cooling blower assembly starts operating when the HV battery temperature rises above a certain level).
HINT
After confirming that DTC P0A9D-123, P0A9E-123, P0AC7-123, P0AC8-123, P0ACC-123, P0ACD-123, P0AEA-123, P0AEB-123, P0BC4-123, P0BC5-123, P0C35-123 and P0C36-123 are output, use the Techstream to check "Temp of Batt TB 1 to 6" in the hybrid control system 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 the HV battery temperature is out of the normal range or its value is abnormal, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0AAE-123 P0AAE.
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. READ VALUE USING TECHSTREAM
(a) Select the following menu items: Powertrain / Hybrid Control / Data List / Temp of Batt TB 1 to 6.
HINT
"Temp of Batt TB 1 to 6" in the Data List represents battery temperature sensors 0 to 5.
(b) Read the data list.
HINT
Compare each of the 6 battery temperature sensor values to determine which battery temperature sensor (0 to 5) is malfunctioning.
NEXT -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR)
(a) Remove the HV battery Removal.
(b) 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.
4. CHECK CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT)
CAUTION:
Be sure to wear insulated gloves.
(a) Check the connection of connector z87 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, Removal.
NG -- CONNECT SECURELY
OK -- Continue to next step.
5. CHECK HV BATTERY (BATTERY 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) For the malfunctioning battery temperature sensor(s), 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):
Standard Resistance (Battery temperature sensor 4):
Standard Resistance (Battery temperature sensor 5):
(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:
Result
C -- REPLACE HV BATTERY Removal
B -- CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR)
A -- REPLACE BATTERY SMART UNIT Removal
6. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTAKE AIR TEMPERATURE SENSOR)
(a) Disconnect the A battery temperature sensor connector (intermediate 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