DTC P1586 (23): Motor Power Inverter (MPI) Module Current Signal/Battery Current Signal Circuit Problem: General Description
The MPI (motor power inverter) current (IPIN) and the battery module (BM) current (ISOC) are used for energy management or motor control in the IMA (integrated motor assist) system. If the correct current cannot be detected, the exhaust emission, the fuel economy or drivability may be adversely affected.
With the high-voltage contactor ON, the IPIN and the ISOC are used to monitor current flowing on the same line through the DC-DC converter which supplies power to the accessories. Comparing the IPIN and the ISOC in relation to the DC-DC converter power consumption enables it to detect a faulty IPIN or ISOC.
If the difference between the IPIN and the ISOC is a set value for a specified time, a malfunction is detected and a DTC is stored.
MONITOR DESCRIPTION CHART
| Execution | Continuous |
| Sequence | Motor current U/V/W phase signal circuit, Battery module, Battery cell, IMA system, Bypass contactor, Motor commutation sensor, Battery cell temperature signal circuit, Detection signal circuit, Battery current circuit, Motor current signal circuit, MPI, MDM, BCM, MCM |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL ON, IMA system indicator ON |
ENABLE CONDITIONS CHART
| Condition | Minimum | Maximum |
|---|---|---|
| MCM power-supply voltage | 10.5 V | - |
| No active DTCs | MPI, Motor current sensor, Battery module, Battery module temperature sensor, MCM, MDM, Motor operation system, Bypass contactor, Motor commutation sensor, MDM voltage sensor, Battery current sensor, MDM current sensor, BCM | |