- Inverter Coolant Temperature
- Ambient Temperature
- Inverter Water Pump Duty
- Inverter Water Pump Revolution
- Motor Temperature
- Generator Temperature
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001EKMW |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [11/2018 - 08/2020] |
| Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY): P0A001C; Motor Electronics Coolant Temperature Sensor Circuit Voltage Out of Range; 2019 - 2020 MY RAV4 HV [11/2018 - 08/2020] | ||
|
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 |
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 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 |
|---|---|---|---|---|---|
|
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) |
|
Comes on |
Master Warning: Comes on |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P0A001C |
|
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
![2019 - 2020 MY RAV4 HV [11/2018 - 08/2020]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY): UTILITY](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the power switch off and wait for 5 hours or more.
NOTICE:
Make sure that the temperature of the motor and generator do not drop below -10°C (14°F).
-
Turn the power switch on (IG) and within 3 seconds or less, turn the power switch on (READY) and wait 10 seconds or more.
HINT:
It is possible to turn the power switch on (READY) without turning it on (IG) first.
- Turn the Techstream on.
- Drive the vehicle for approximately 10 minutes with the value of Data List item "Inverter Coolant Temperature" 25°C (77°F) or more.
- 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 driving pattern again.
WIRING DIAGRAM
Refer to the wiring diagram for the Cooling System.
Click here
CAUTION / NOTICE / HINT
CAUTION:
-
Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
-
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
Click here
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
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
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 |
|---|---|
|
P0A001C 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 |
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 |
|
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 |
HINT:
-
P0A001C may be output as a result of the malfunctions indicated by the DTCs above.
- 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.)
(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
|
|
|