P0A9C
HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A9C-123, P0AC6-123, P0ACB-123, P0AE9-123, P3065-123: Hybrid Battery Temperature Sensor "A" Range / Performance
P3065-123 - Hybrid Battery Temperature Sensor Range / Performance Stack A
DESCRIPTION
- The battery temperature sensors are provided at 4 locations on the bottom of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensor to detect the HV battery temperature, and sends the detected value to the hybrid vehicle control ECU. Based on the results of this detection, the hybrid vehicle control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.)
Temperature Sensor Identification Cross Reference Table:
HINT
For example, sensor A in the DTC title is battery temperature sensor (No. 0). This sensor is displayed as Temp of Batt TB1 in the 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
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.
PROCEDURE
1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) P0A7F
B -- GO TO DTC CHART P0A1F
A -- Continue to next step.
2. CHECK INSTALLATION OF BATTERY TEMPERATURE SENSOR
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 HV battery assembly Removal.
(d) Visually check the installation condition of the relevant battery temperature sensor.
Standard Condition:
Each battery temperature sensor is installed in the correct location and its claws are engaged securely.
Result:
NOTICE:
Do not use a stick or similar object to push on the sensors when inspecting them. Doing so may result in damage to the sensors.
Text in Illustration
(e) Install the HV battery assembly Installation.
(f) Connect the cable to the negative (-) battery terminal.
B -- REPLACE HV BATTERY ASSEMBLY Components
A -- Continue to next step.
3. CHECK HV BATTERY ASSEMBLY (BATTERY TEMPERATURE SENSOR)
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 hybrid battery junction block assembly Removal.
(d) Disconnect the z15 and z37 connectors of the battery smart unit.
(e) Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).
Tester Connection
Standard Resistance
Text in Illustration
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(g) Connect the z15 and z37 connectors of the battery smart unit.
(h) Install the hybrid battery junction block assembly Installation.
(i) Connect the cable to the negative (-) battery terminal.
NG -- CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR AND INLET TEMPERATURE SENSOR)
OK -- REPLACE BATTERY SMART UNIT Components
4. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR AND INLET TEMPERATURE SENSOR)
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 hybrid battery junction block assembly Removal.
(d) Check the wire harness and connectors of the battery temperature sensor and inlet air temperature sensor for abnormalities by sight and touch.
Specified Condition:
There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.
HINT
- Only check the wire harnesses and connectors that are visible on the outside of the battery cover.
- Do not manipulate or check the sensors in the battery.
(e) Install the hybrid battery junction block assembly Installation.
(f) Connect the cable to the negative (-) battery terminal.
NG -- REPAIR HARNESS OR CONNECTOR
OK -- REPLACE HV BATTERY ASSEMBLY Components