- Inverter Coolant Water Temperature
- Ambient Temperature
- (Inverter) W/P Run Control Duty
- Inverter W/P Revolution
DTC SUMMARY
MALFUNCTION DESCRIPTION
These DTCs indicate the temperature sensor value is abnormal. The cause of this malfunction may be one of the following:
Area | Main Malfunction Description | Step |
---|---|---|
Inverter low-voltage circuit | The connectors are not connected properly | 2 |
Hybrid cooling system | Coolant circulation abnormal (frozen or leaking, etc.) | 3 |
Inside of inverter | Inverter with converter assembly internal circuit malfunction | 3 |
DESCRIPTION
The hybrid vehicle control ECU detects HV coolant temperature using the coolant temperature sensor built into the inverter with converter assembly. The hybrid vehicle control ECU uses signals from the coolant temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the hybrid vehicle control ECU will limit inverter output to help prevent inverter overheating. The hybrid vehicle control ECU also detects malfunctions in the sensor based on the HV coolant temperature sensor values. The inverter with converter assembly detects malfunctions in the HV coolant temperature sensor and its wiring.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P0A01-726 | Motor Electronics Coolant Temperature Sensor Circuit Range / Performance | Abnormal deviation in inverter coolant temperature sensor output. Both of the following conditions are met for 10 seconds or more:
(1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
P0A04-725 | Motor Electronics Coolant Temperature Sensor Circuit Intermittent | Sudden change in HV coolant temperature sensor output or hunting: Unusual sudden change in HV coolant temperature sensor output occurs and the offset continues for a certain period of time. Unusual sudden change in HV coolant temperature sensor output occurs repeatedly. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
DTC No. | ECU Data List |
---|---|
P0A01-726 |
|
P0A04-725 |
MONITOR DESCRIPTION
If the hybrid vehicle control ECU detects a malfunction of the HV coolant temperature sensor, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
Related DTCs | P0A01 (INF 726): Motor Electronics Coolant Temperature Sensor Circuit Range / Performance P0A04 (INF 725): Motor Electronics Coolant Temperature Sensor Circuit Intermittent |
Required sensors/components | HV coolant 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
Hybrid vehicle control ECU | DTC P0A01 (INF 726) is not detected DTC P0A04 (INF 725) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
Check that there are no abnormalities (abnormal sounds, coolant leaks, DTC output, etc).
HINT:
CAUTION / NOTICE / HINT
CAUTION:
Click here
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.
Click here
HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
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 |
---|---|
P0A01-726 or P0A04-725 only is output, or DTCs except the ones in the table below are also output. | A |
Any of the following DTCs are also output. | B |
Relevant DTC | |
---|---|
P0A93-346 | Inverter Cooling System Performance |
P0C73-776 | Motor Electronics Coolant Pump "A" Control Performance |
P314A-828 | Inverter Coolant Pump Speed Signal |
HINT:
P0A01-726 or P0A04-725 may be output as a result of the malfunction indicated by the DTCs above.
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
2. | CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
Click here
Result | Proceed to |
---|---|
OK | A |
NG (The connector is not connected securely.) | B |
NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) | C |
B | CONNECT SECURELY |
C | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | CHECK COOLING SYSTEM |
Click here
HINT:
If the "Cooling System" inspection results are normal, perform the next step.
NEXT | REPLACE INVERTER WITH CONVERTER ASSEMBLY |