DESCRIPTION
These DTCs will be stored if the difference between the maximum and minimum output of each battery temperature sensors exceeds a certain amount and if the output of one battery temperature sensor deviates from that of the other sensors.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P0A9B1C | Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range | The performance of battery temperature sensor 0 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
P0AC51C | Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range | The performance of battery temperature sensor 1 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
P0ACA1C | Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range | The performance of battery temperature sensor 2 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
DTC No. | Data List |
---|---|
P0A9B1C |
|
P0AC51C | |
P0ACA1C |
HINT:
If the vehicle is left as is for 24 hours, the value of "Hybrid Battery Temperature" will be almost the same as the ambient temperature.
The following items can be helpful when performing repairs:
MONITOR DESCRIPTION
The battery temperature sensors are provided at 3 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 voltage sensor 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 the HV battery temperature rises above a predetermined level.)
MONITOR STRATEGY
Related DTCs | P0A9C (INF P0A9B1C), P0AC6 (INF P0AC51C), P0ACB (INF P0ACA1C): Battery temperature sensor malfunction (deviation) |
Required sensors/components | Battery temperature sensor |
Frequency of operation | Continuous |
Duration | TMC's intellectual property |
MIL operation | 1 driving cycle |
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
Other conditions belong to TMC's intellectual property | - |
TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property | - |
COMPONENT OPERATING RANGE
Battery voltage sensor | DTC P0A9C (INF P0A9B1C) is not detected DTC P0AC6 (INF P0AC51C) is not detected DTC P0ACB (INF P0ACA1C) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
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HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
HINT:
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A9B2A.
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CAUTION / NOTICE / HINT
CAUTION:
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*a | Without waiting for 10 minutes |
HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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PROCEDURE
1. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes Result | Proceed to |
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P0AFC00 or P0AFC96 is not output. | A |
P0AFC00 or P0AFC96 is output. | B |
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
2. | CHECK INSTALLATION OF TEMPERATURE SENSOR (HYBRID BATTERY TEMPERATURE SENSOR) |
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Result | Proceed to |
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Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely. | A |
Claws are damaged. | B |
Any of battery temperature sensors are not installed correctly, but claws are not damaged. | C |
B | REPLACE HYBRID BATTERY THERMISTOR |
C | INSTALL PARTS CORRECTLY |
|
3. | CHECK HYBRID BATTERY THERMISTOR (BATTERY TEMPERATURE SENSOR) |
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OK | REPLACE BATTERY VOLTAGE SENSOR |
|
4. | CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) |
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OK | REPLACE HYBRID BATTERY THERMISTOR |
NG | REPAIR HARNESS OR CONNECTOR (BATTERY TEMPERATURE SENSOR) |