DTC P0601: Internal Control Module Memory Check Sum Error
Circuit description
The value calculated by the transmission control computer is compared with the data stored in the transmission control computer ASSY when IG is ON, and when they do not match 2 times consecutively, DTC is detected and the learning is prohibited. If the problem persists, cut continuity to all the solenoid (lock at 4th gear).
| DTC No. SAE/TCCS | DTC detecting condition
|
Inspection parts |
|---|---|---|
| P0601 |
|
|
Monitor description
TCM observes inner operation. If a defect is found in inner operation, TCM turns on MIL and records diagnostic codes.
MONITOR STRATEGY DESCRIPTION
| Applicable diagnostic codes | P0601: Internal Control Module Memory Check Sum Error |
| Required sensor/component | TCM |
| Operation frequency | Once per driving cycle |
| Period | 2 times |
| MIL operation | Immediate |
| Operation order | None |
TYPICAL ENABLING CONDITIONS
Either of the following conditions must be satisfied: condition (A) or (B)
ENABLING CONDITIONS DESCRIPTION
| If the following diagnostic code is not present, the monitor operates. | None |
| IG SW is turned from OFF to ON. | Yes |
ENABLING CONDITIONS DESCRIPTION
| If the following diagnostic code is not present, the monitor operates. | None |
| A request to clear the diagnostic code from the diagnosis tool is received. | Yes |
TYPICAL MALFUNCTION THRESHOLDS DESCRIPTION
| Total data calculated by flash ROM | None (flash ROM checksum data) |
Inspection steps
NOTE:
Read the freeze frame data using the SSM4. A part of the engine running conditions under which the engine trouble occurred is recorded in the freeze frame data, which is useful for troubleshooting.
- Replacement of transmission control computer ASSY
- Replace the transmission control computer ASSY. (Refer to Transmission control computer ASSY )
Next: AT unit correction (refer to Inspection for problems that do not normally occur )