DTC P0603: Problem in Transmission Control Module (TCM): General Description
The electronically erasable programmable read-only memory (EEPROM) in the transmission control module (TCM) can read data to/from its memory. This memory also can hold data even after the battery is disconnected. If an abnormality in the data read from the EEPROM occurs a set number of times, the CPU detects a malfunction and stores a DTC.
MONITOR DESCRIPTION CHART
| Execution | Once per driving cycle |
| Sequence | None |
| Duration | 60 seconds or less |
| DTC Type | One drive cycle, MIL ON, D indicator blinks |
ENABLE CONDITIONS CHART
| Condition | |
|---|---|
| Ignition switch | ON |
| Other | When disconnecting and reconnecting the battery |