Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026PWT |
Model Year Start: 2023 |
Model: Corolla HV |
Prod Date Range: [09/2022 -
] |
Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0A001C; Motor Electronics Coolant Temperature Sensor Circuit Voltage Out of Range; 2023 - 2025 MY Corolla HV [09/2022 - ] |
DTC
|
P0A001C
|
Motor Electronics Coolant Temperature Sensor Circuit Voltage Out of Range
|
DTC SUMMARY
MALFUNCTION DESCRIPTION
These DTCs indicate that the temperature sensor value is abnormal. The cause of this malfunction may be one of the following:
Area
|
Main Malfunction Description
|
Inverter low-voltage circuit
|
The connectors are not connected properly
|
Hybrid cooling system
|
Coolant circulation abnormal (frozen or leaking, etc.)
|
Inside of inverter
|
Inverter with converter assembly internal circuit malfunction
|
DESCRIPTION
The motor generator control ECU detects the HV coolant temperature using the HV coolant temperature sensor built into the inverter with converter assembly. The motor generator control ECU uses signals from the coolant temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the motor generator control ECU will limit inverter output to help prevent inverter overheating. The motor generator control ECU also detects malfunctions in the sensor based on the HV coolant temperature sensor values.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
Warning Indicate
|
Note
|
P0A001C
|
Motor Electronics Coolant Temperature Sensor Circuit Voltage Out of Range
|
The actual inverter coolant temperature is high and the difference between the estimated inverter coolant temperature and the actual temperature exceeds a threshold for 10 seconds, or after a long soak, the inverter coolant temperature sensor value differs from the values of other sensors.
(1 trip detection logic)
|
-
Inverter cooling system
-
Cooling fan system
-
Inverter with converter assembly
-
Wire harness or connector
|
Comes on
|
Master Warning:
Comes on
|
SAE Code:
P0A01
|
MONITOR DESCRIPTION
If the motor generator control ECU detects a malfunction of the Motor Electronics Coolant Temperature Sensor, the ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
Related DTCs
|
P0A01 (INF P0A001C): Motor electronics coolant temperature sensor circuit malfunction (deviation)
|
Required sensors/components
|
Inverter, boost converter
|
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
Motor generator control ECU
|
DTC P0A01 (INF P0A001C) is not detected
|
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
-
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the ignition switch off and wait for 2 minutes or more.
-
Turn the ignition switch to ON (READY). [*1]
-
Drive the vehicle for approximately 10 minutes with the value of Data List item "Inverter Coolant Temperature" 25°C (77°F) or more. [*2]
HINT:
[*1] to [*2]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
-
Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
-
If the judgment result shows NORMAL, the system is normal.
-
If the judgment result shows ABNORMAL, the system has a malfunction.
-
If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.
WIRING DIAGRAM
Refer to the wiring diagram for the Cooling System.
Click here
CAUTION / NOTICE / HINT
CAUTION:
Refer to the precautions before inspecting high voltage circuit.
Click here
HINT:
-
P0A001C may be output as a result of the malfunctions indicated by the DTCs in table below.
-
The chart above is listed in inspection order of priority.
-
Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
Table 1
Malfunction Content
|
Relevant DTC
|
Insulation malfunction
|
P1C7C49
|
Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
|
P1C7D49
|
Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
|
P1C7E49
|
Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
|
P1C7F49
|
Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
|
P1C8049
|
Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure
|
Table 2
Malfunction Content
|
Relevant DTC
|
Sensor and actuator circuit malfunction
|
P0C7396
|
Motor Electronics Coolant Pump "A" Component Internal Failure
|
P314A31
|
Motor Electronics Coolant Pump "A" No Signal
|
System malfunction
|
P0A9300
|
Inverter "A" Cooling System Performance
|
PROCEDURE
1.
|
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
|
A
|
|
|
Click here
HINT:
If the "Cooling System" inspection results are normal, perform the next step.
|