DTC P1601 TCM Data Communication Failure
WARNING: This page is about a different variant/trim than selected.
DTC DETECTING CONDITION:
Communication does not complete between control valve memory box.
TROUBLE SYMPTOM:
Shifting quality malfunction
WIRING DIAGRAM:
COMMUNICATION CHART
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK IMPROPER CONNECTION OF TRANSMISSION CONNECTOR. Check loose connection on TCM connector (B54). |
Is there improper connection of connector? | Go to step 2. | Connect it securely. |
| 2 CHECK DTC OF TCM. | Is DTC of oil pressure switch detected? | Perform the diagnosis according to DTC. | Go to step 3. |
3 CHECK TCM OUTPUT SIGNAL.
|
Is the voltage 10 - 13 V? | Go to step 4. | Go to step 5. |
4 CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.
|
Is the resistance less than 1 Ω? | Go to step 5. | Repair the open circuit of harness between TCM and transmission connector, or poor contact of connector. |
| 5 CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 12 - Chassis ground: (B54) No. 21 - Chassis ground: (B54) No. 6 - Chassis ground: |
Is the resistance more than 1 MΩ? | Go to step 6. | Repair the short circuit of harness between TCM and transmission connector. |
| 6 CHECK HARNESS CONNECTOR BETWEEN TRANSMISSION CONNECTOR AND CONTROL VALVE BODY CONNECTOR. Measure the resistance between transmission connector and control valve body connector. Connector & terminal (B11) No. 9 - (T15) No. 10: (B11) No. 10 - (T15) No. 9: (B11) No. 11- (T15) No. 8: |
Is the resistance less than 1 Ω? | Go to step 7. | Repair the open circuit of harness between transmission connector and control valve body connector. |
| 7 CHECK HARNESS CONNECTOR BETWEEN TRANSMISSION CONNECTOR AND CONTROL VALVE BODY CONNECTOR. Measure the resistance between transmission connector and chassis ground. Connector & terminal (B11) No. 9 - Chassis ground: (B11) No. 10 - Chassis ground: (B11) No. 11 - Chassis ground: |
Is the resistance more than 1 MΩ? | Go to step 8. | Repair the short circuit of harness between transmission connector and control valve body connector. |
| 8 CHECK POOR CONTACT.
NOTE:
Data communication malfunction is detected when the malfunction occurred on inspection area above while transmission assembly is replacing or "Clear Memory 2" is performing. When the repair is performed with following diagnosis above, perform the "Clear Memory 2", and then recheck that the DTC of TCM data communication malfunction is not detected.
|
Is there any open or poor contact of connector (loosing terminal, entering foreign matter, damaging connector body)? | Repair the poor contact. | Replace the transmission assembly. < Ref. to AUTOMATIC TRANSMISSION ASSEMBLY . > |