DTC P1644: MOTFSA Signal Malfunction: General Description
The motor control module (MCM) sends various information about the IMA system to the engine control module (ECM) via the MOTFSA signal line. If no duty signals are input from the MCM for a set time, the ECM detects a malfunction and stores a DTC.
MONITOR DESCRIPTION CHART
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | One drive cycle, MIL ON |
ENABLE CONDITIONS CHART
| Condition | Minimum | Maximum |
|---|---|---|
| Battery voltage | 10.05 V | - |
| Ignition switch | ON | |
| No active DTCs | ECM | |