DTC P1437 (41): Motor Drive Module (MDM) Short Circuit Sensor Problem: General Description
If a short circuit occurs in the three-phase coil of the integrated motor assist (IMA) motor when driving, the motor drive module (MDM) stops functioning and changes the flag short circuit (FSC) signals from a high level to a low level to protect itself. If the FSC signals stay at a low voltage level for a set time (t1), the motor control module (MCM) detects a malfunction and stores a DTC.
MONITOR DESCRIPTION CHART
| Execution | Once per driving cycle |
| 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 | 0.6 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 | MCM | |