DTC Troubleshooting
DTC Troubleshooting: P1861 (33)
DTC P1861:
Inhibitor Solenoid Circuit High Voltage
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information How To Troubleshoot The CVT System.
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Select the Inhibitor Solenoid Test in the Miscellaneous Test Menu with the HDS.
4. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1861 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the PCM and the inhibitor solenoid.�
5. Turn the ignition switch to LOCK (0).
6. Disconnect the solenoid wire harness connector.
7. Measure the resistance between solenoid wire harness connector terminal No. 5 and body ground.
Is there 11.7-21.0 Ohms?
YES -
Go to step 11.
NO -
Go to step 8.
8. Remove the lower valve body Lower Valve Body Removal/Installation.
9. Disconnect the inhibitor solenoid connector.
10. Measure the resistance between inhibitor solenoid connector terminal No. 2 and body ground.
Is there 11.7-21.0 Ohms?
YES -
Replace the solenoid wire harness CVT Drive Pulley Pressure Control Solenoid Valve Replacement, then go to step 14.
NO -
Replace the inhibitor solenoid Inhibitor Solenoid Replacement, then go to step 14.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector B (44P).
13. Check for continuity between PCM connector terminal B10 and solenoid wire harness connector terminal No. 5.
Is there continuity?
YES -
Go to step 20.
NO -
Repair an open in the wire between PCM connector terminal B10 and the solenoid wire harness connector, then go to step 14.
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Clear the DTC with the HDS.
17. Select the Inhibitor Solenoid Test in the Miscellaneous Test Menu with the HDS.
18. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1861 indicated?
YES -
Check for poor connections or loose terminals between the inhibitor solenoid and the PCM, then go to step 1.
NO -
Go to step 19.
19. Monitor the OBD STATUS for P1861 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 18, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals between the inhibitor solenoid and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 17.
20. Reconnect all connectors.
21. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
22. Select the Inhibitor Solenoid Test in the Miscellaneous Test Menu with the HDS.
23. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1861 indicated?
YES -
Check for poor connections or loose terminals between the inhibitor solenoid and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 22. If the PCM was substituted, go to step 1.
NO -
Go to step 24.
24. Monitor the OBD STATUS for P1861 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs were indicated in step 23, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals between the inhibitor solenoid and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 22. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 22.