MALFUNCTION DESCRIPTION
These DTCs are stored when the transmission fluid temperature sensor output is abnormal. The cause of this malfunction may be one of the following:
Motor generator control ECU (MG ECU) malfunction
Internal transmission fluid temperature sensor malfunction
Open or short in transmission fluid temperature sensor
The connectors are not connected properly
Foreign matter or water on the connector terminals
Open or short in wire harness
Refer to the description for DTC P274A11.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P274A1C | Transmission Fluid Temperature Sensor "C" Voltage Out of Range | After a long soak, the value of the transmission fluid temperature sensor is different from the value of the other temperature sensors.
(2 trip detection logic) |
·
Wire harness or connector ·
Hybrid vehicle transaxle assembly (Transmission fluid temperature sensor) |
Comes on | Master Warning:
Comes on |
SAE Code:
P274B |
| P274A1F | Transmission Fluid Temperature Sensor "C" Circuit Intermittent | Sudden change in transmission fluid temperature sensor output or hunting:
Unusual sudden change in transmission fluid temperature sensor output occurs and offset condition continues for a certain period of time, or unusual change in transmission fluid temperature sensor output occurs repeatedly. (1 trip detection logic) |
·
Wire harness or connector ·
Hybrid vehicle transaxle assembly (Transmission fluid temperature sensor) |
Comes on | Master Warning:
Comes on |
SAE Code:
P274E |
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.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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.
Leave the vehicle as is for 5 hours or more and then check the values of the Data List items "Generator Temperature", "Motor Temperature" and "Transaxle Oil Temperature". [*1]
Turn the ignition switch to ON and turn the GTS on. [*2]
[*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.
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.
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.
With ignition switch ON and wait for 5 seconds or more. [*1]
[*1]: 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.
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.
Refer to the wiring diagram for DTC P274A11.
Refer to the precautions before inspecting high voltage circuit.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
When disconnecting and reconnecting the auxiliary battery.
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Check for DTCs.
| 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 | |
|---|---|
| P261029 | ECM/PCM Engine Off Timer Performance Signal Invalid |
Turn the ignition switch off.
A
B
Check for DTCs.
| 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 | |
|---|---|
| P274A11 | Transmission Fluid Temperature Sensor "C" Circuit Short to Ground |
| P274A15 | Transmission Fluid Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open |
Turn the ignition switch off.
A
B
| 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 |
A
B
C
| 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 |
A
B
C
| Proceed to |
|---|
| OK |
| NG |
OK
NG