| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026Q1N |
| Model Year Start: 2023 | Model: Corolla HV | Prod Date Range: [09/2022 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0A302A; Drive Motor "B" Temperature Sensor Signal Stuck In Range; 2023 - 2025 MY Corolla HV [09/2022 - ] | ||
|
DTC |
P0A302A |
Drive Motor "B" Temperature Sensor Signal Stuck In Range |
DTC SUMMARY
MALFUNCTION DESCRIPTION
This DTC is stored when the rear motor temperature sensor output is abnormal.
The cause of this DTC output may be the following:
Rear motor temperature sensor malfunction
- Rear motor temperature sensor internal malfunction
Wire harness malfunction between the rear motor temperature sensor and hybrid vehicle control ECU
- The connectors are not connected properly
- Foreign matter or water on the connector terminals
HINT:
When this DTC is stored, the rear motor temperature sensor is malfunctioning and the self-protection function may not operate. Therefore under certain high load driving condition, the temperature of the rear motor becomes high. If the self-protection function does not operate, the rear motor may malfunction and cause the vehicle to enter fail-safe mode.
DESCRIPTION
Refer to the description for DTC P0A3011.
Click here
![2023 - 2025 MY Corolla HV [09/2022 - ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0A3011,P0A3015; Drive Motor "B" Temperature Sensor Circuit Short to Ground+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
Note |
|---|---|---|---|---|---|---|
|
P0A302A |
Drive Motor "B" Temperature Sensor Signal Stuck In Range |
The difference between the maximum and minimum output temperatures of the rear traction motor is less than the stuck malfunction judgment deviation. (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0A31 |
CONFIRMATION DRIVING PATTERN
HINT:
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS 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 GTS on.
- Drive the vehicle (stop and go driving) on urban roads for approximately 5 minutes. If the Data List item "Rear Motor Temperature" shows both increases and decreases in temperature, suspected areas indicated by this DTC are not malfunctioning.
- Enter the following menus: Powertrain / Hybrid Control / 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 DTC P0A3011.
Click here
PROCEDURE
|
1. |
CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
No DTCs are 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 |
|
|---|---|
|
P0A3011 |
Drive Motor "B" Temperature Sensor Circuit Short to Ground |
|
P0A3015 |
Drive Motor "B" Temperature Sensor Circuit Short to Battery or Open |
(b) Turn the ignition switch off.
| B |
|
GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
|
2. |
CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU 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 HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - HYBRID VEHICLE CONTROL ECU) |
(a) Disconnect the hybrid vehicle control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I3-48 (RMT) - I3-47 (RMTG) |
Ignition switch off |
0.3 to 1500 kΩ |
(c) Reconnect the hybrid vehicle control ECU connector.
| NG |
|
|
|
4. |
CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE 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 |
|
|
5. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - FLOOR WIRE) |
(a) Disconnect the floor wire connector.
(b) Disconnect the hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
When performing the measurement, lightly jiggle the wire harness up and down and left and right and confirm that the resistance does not fluctuate.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OI1-57 - I3-48 (RMT) |
Ignition switch off |
Below 1 Ω |
|
OI1-56 - I3-47 (RMTG) |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OI1-57 or I3-48 (RMT) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
OI1-56 or I3-47 (RMTG) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(d) Reconnect the hybrid vehicle control ECU connector.
(e) Reconnect the floor wire connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK CONNECTOR CONNECTION CONDITION (NO. 6 FLOOR WIRE 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 |
|
|
7. |
CHECK HARNESS AND CONNECTOR (NO. 6 FLOOR WIRE - FLOOR WIRE) |
(a) Disconnect the No. 6 floor wire connector.
(b) Disconnect the floor wire connector.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
When performing the measurement, lightly jiggle the wire harness up and down and left and right and confirm that the resistance does not fluctuate.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OR1-1 - OI1-57 |
Ignition switch off |
Below 1 Ω |
|
OR1-2 - OI1-56 |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OR1-1 or OI1-57 - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
OR1-2 or OI1-56 - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(d) Reconnect the No. 6 floor wire connector.
(e) Reconnect the floor wire connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR TEMPERATURE SENSOR 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 |
|
|
9. |
CHECK HARNESS AND CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - NO. 6 FLOOR WIRE) |
(a) Disconnect the No. 6 floor wire connector.
(b) Disconnect the rear motor temperature sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R17-2 (RMT) - OR1-1 |
Ignition switch off |
Below 1 Ω |
|
R17-1 (RMTG) - OR1-2 |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R17-2 (RMT) or OR1-1 - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
R17-1 (RMTG) or OR1-2 - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(d) Reconnect the rear motor temperature sensor connector.
(e) Reconnect the No. 6 floor wire connector.
| OK |
|
REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
10. |
INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) |
(a) Disconnect the floor wire connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OI1-56 - OI1-57 |
Ignition switch off |
0.3 to 1500 kΩ |
(c) Reconnect the floor wire connector.
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (FLOOR WIRE - HYBRID VEHICLE CONTROL ECU) |
|
|
11. |
INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) |
(a) Disconnect the No. 6 floor wire connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
OR1-1 - OR1-2 |
Ignition switch off |
0.3 to 1500 kΩ |
(c) Reconnect the frNo. 6 floor wire connector.
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 6 FLOOR WIRE - FLOOR WIRE) |
|
|
12. |
INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR TEMPERATURE SENSOR) |
Click here
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR MOTOR TEMPERATURE SENSOR - NO. 6 FLOOR WIRE) |
| NG |
|
REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY
|
|
|