- Rear Motor Inverter Temperature
- Inverter Coolant Temperature
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001H9HZ |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [02/2019 - ] |
| Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P0AF21C; Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range; 2019 - 2024 MY RAV4 HV [02/2019 - ] | ||
|
DTC |
P0AF21C |
Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range |
DTC SUMMARY
MALFUNCTION DESCRIPTION
These DTCs indicate that the rear motor inverter temperature sensor value is abnormal. The cause of this malfunction may be one of the following:
Internal inverter malfunction
- Inverter with converter assembly internal circuit malfunction
Hybrid cooling system malfunction
- Coolant circulation abnormal (frozen or leaking, etc.)
Inverter low-voltage circuit malfunction
- The connectors are not connected properly
DESCRIPTION
The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, detects the temperature of the rear motor inverter using the rear motor inverter temperature sensor. If necessary, the motor generator control ECU (MG ECU) will limit inverter output to help prevent the rear motor inverter from overheating. The motor generator control ECU also detects malfunctions in the sensor based on the temperature sensor values.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P0AF21C |
Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range |
The actual rear motor inverter temperature high and the difference between the estimated rear motor inverter temperature and the actual temperature exceeds a threshold for 10 seconds, or after a long soak, the rear motor inverter 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 |
|---|---|
|
P0AF21C |
|
MONITOR DESCRIPTION
If the motor generator control ECU detects a malfunction of the Drive Motor Inverter Temperature Sensor "B", it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0AF3 (INF P0AF21C): Drive motor inverter temperature sensor "B" 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 P0AF3 (INF P0AF21C) 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.
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![2019 - 2024 MY RAV4 HV [02/2019 - ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): UTILITY](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- 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 and turn the Techstream on.
- 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.
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CAUTION / NOTICE / HINT
CAUTION:
-
Before the following operations are conducted, take precautions to prevent electric shock by turning the ignition 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.
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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
NOTICE:
After turning the ignition 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) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
P0AF21C 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 |
|
|
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 |
HINT:
-
P0AF21C may be output as a result of the malfunction 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 ignition 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
|
|
|