MALFUNCTION DESCRIPTION
If an overvoltage malfunction occurs in the motor inverter and generator inverter, the motor generator control ECU (MG ECU) detects the malfunction and stores this DTC. The cause of this malfunction may be one of the following:
Inverter with converter assembly internal circuit malfunction
Malfunction in ECU that controls the inverter
For a description of the inverter.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P1CB69E | Drive Motor "A" Inverter Voltage Sensor(VH) Stuck On | Motor inverter overvoltage signal detected (circuit malfunction)
(1 trip detection logic) |
·
Inverter with converter assembly ·
Wire harness or connector |
Comes on | Master Warning:
Comes on |
SAE Code:
P0A78 |
If the motor inverter detects a circuit malfunction, it will transmit a motor inverter overvoltage signal to the motor generator control ECU. Upon receiving this signal, the motor generator control ECU will illuminate the MIL and store a DTC.
| Related DTCs | P0A78 (INF P1CB69E): OVH detection (Circuit malfunction) |
| Required sensors/components | Motor inverter |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | 1 driving cycle |
| Sequence of operation | None |
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
| TMC's intellectual property | - |
| Motor generator control ECU | DTC P0A78 (INF P1CB69E) is not detected |
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.
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 wait for 5 seconds or more. [*1]
Turn the ignition switch to ON (READY) and wait for 5 seconds or more. [*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.
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 |
|---|---|
| P06881F is not output. | A |
| P06881F is also output. | B |
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