DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU uses the inverter voltage to monitor the HV battery voltage and detect malfunctions.
The cause of this malfunction may be the following:
DESCRIPTION
The hybrid vehicle control ECU uses the inverter voltage to monitor the HV battery voltage and detect malfunctions.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P31B300 | Hybrid/EV Battery Voltage High | The inverter voltage exceeds the threshold. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
MONITOR DESCRIPTION
The hybrid vehicle control ECU monitors the cell overcharge signal. If the hybrid vehicle control ECU detects an abnormality in the sensor signal, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
Related DTCs | P31B3 (INF P31B300): Hybrid/EV Battery Voltage high |
Required sensors/components | Battery ECU assembly |
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
Hybrid vehicle control ECU | 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 the HV battery high-voltage line circuit.
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CAUTION / NOTICE / HINT
CAUTION:
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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.
*a | Without waiting for 10 minutes |
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.
*a | Dealer |
*b | Battery Collection Agent |
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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, MOTOR GENERATOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes Powertrain > Motor Generator > Trouble Codes Result | Proceed to |
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P31B300 only is output, or DTCs except the ones in the table below are also output. | A |
DTCs of hybrid control system in the tables below are output. | B |
DTCs of motor generator control system in the tables below are output. | C |
Malfunction Content | System | Relevant DTC | |
---|---|---|---|
Sensor and actuator circuit malfunction | Hybrid control system | P0D2D1C | Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range |
P0E311C | Boosting Converter Voltage Sensor "A" Voltage Out of Range | ||
P1C2D62 | Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure | ||
Motor generator control system | P0D2D16 | Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold | |
P0D2D17 | Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold | ||
P0D2D1F | Drive Motor "A" Inverter Voltage Sensor(VH) Circuit Intermittent | ||
P0E3116 | DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold | ||
P0E3117 | DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold | ||
P0E311F | DC/DC Converter Voltage Sensor "A"(VL) Circuit Intermittent | ||
P0E5717 | DC/DC Converter Voltage Sensor "A"(VL) Circuit Voltage Above Threshold |
HINT:
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
C | GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) |
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2. | READ VALUE USING TECHSTREAM (HYBRID/EV BATTERY VOLTAGE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV battery / Data List / Hybrid/EV Battery Voltage
(d) Read the Data List.
Powertrain > HV Battery > Data List Tester Display |
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Hybrid/EV Battery Voltage |
NOTICE:
Be sure not to measure when the power switch is on (READY).
(e) Make a note of the data list item "Hybrid/EV Battery Voltage".
(f) Turn the power switch off.
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3. | CHECK HV BATTERY |
CAUTION:
Be sure to wear insulated gloves.
(a) 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.
(b) Remove the electric vehicle battery plug assembly.
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(c) Disconnect the y11 and y12 HV battery high voltage connectors. NOTICE: Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector. | |
(d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
CAUTION: Do not allow the probes of the electrical tester to contact each other during this inspection. |
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(e) Check the value in the data list "Hybrid/EV Battery Voltage" and the hybrid battery voltage value that was actually measured.
Result | Proceed to |
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When the difference between "Hybrid/EV Battery Voltage" in the Data List and the measurement value of the HV battery voltage is 5 V or more. | A |
Other than above | B |
(f) Reconnect the y11 and y12 HV battery high voltage connectors.
(g) Install the electric vehicle battery plug assembly.
B | GO TO STEP 5 |
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4. | REPLACE BATTERY ECU ASSEMBLY |
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NEXT | REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY AND NO. 2 HV SUPPLY STACK SUB-ASSEMBLY |
5. | 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 / Hybrid Control / Trouble Codes.
(d) Read the freeze frame data of DTC P31B300.
Powertrain > Hybrid Control > Trouble Codes Result | Proceed to |
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"Hybrid/EV Battery Voltage" is less than 292 V. | A |
Other than above | B |
(e) Turn the power switch off.
A | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
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6. | REPLACE BATTERY ECU ASSEMBLY |
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NEXT | REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY AND NO. 2 HV SUPPLY STACK SUB-ASSEMBLY |