DTC P1642: QBATT Battery Signal Circuit Low Input: General Description
The motor control module (MCM) sends the information about the battery's state of charge to the engine control module (ECM) via the QBATT signal line. If the QBATT battery signal voltage is a set value or less, a malfunction is detected and a DTC is stored.
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, IMA QBATT signal, IMA MOTFSA | |