DESCRIPTION
If the voltage of any HV battery cell exceeds the threshold, charging will be prohibited. If charging cannot be prohibited due to an hybrid battery system malfunction, this DTC will be stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P31B300 | Hybrid/EV Battery Voltage High | Charging cannot be prohibited when the voltage of any HV battery cell has exceeded the specified threshold. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
DTC No. | Data List |
---|---|
P31B300 | Hybrid/EV Battery Cell 1 to 70 Voltage |
The following items can be helpful when performing repairs:
MONITOR DESCRIPTION
If the maximum voltage of any HV battery cell exceeds the threshold but charging continues to be performed, the battery ECU assembly will determine that there is a malfunction, illuminate the MIL and store this DTC.
MONITOR STRATEGY
Related DTCs | P31B3 (INF P31B300): Battery cell Voltage high |
Required sensors/components | Battery current 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 ECU assembly | DTC P31B3 (INF P31B300) 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 P0AA649.
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CAUTION / NOTICE / HINT
CAUTION:
*a | Without waiting for 10 minutes |
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.
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 (HV BATTERY, HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes Result | Proceed to |
---|---|
"P31B300" only is output. | A |
DTCs except "P31B300" of hybrid battery system are output. | B |
DTCs except "P31B300" of hybrid control system are output. | C |
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID BATTERY SYSTEM) |
C | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
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2. | CHECK FREEZE FRAME DATA (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery / Trouble Codes.
(d) Read the freeze frame data of DTC P31B300.
Powertrain > HV Battery > Trouble Codes Result | Proceed to |
---|---|
OFF is displayed for "Ready Signal", "SMRP Control Status", "SMRB Control Status" and "SMRG Control Status" and -0.5 A or less is displayed for "Hybrid/EV Battery Current". | A |
Other than above | B |
HINT:
As the power switch on (IG) state may cause the DTC to be stored, freeze frame data is used to judge the cause of the DTC output.
(e) Turn the power switch off.
B | REPLACE HYBRID VEHICLE CONTROL ECU |
|
3. | INSPECT HV BATTERY JUNCTION BLOCK ASSEMBLY (SMRP, SMRB, SMRG) |
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NG | REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
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4. | PERFORM INITIALIZATION (CURRENT SENSOR OFFSET LEARNING) |
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NEXT | END |