Manufacturer Code Charts: 43

DTC Troubleshooting: P1891 (43)

DTC P1891:

Start Clutch Control System

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.

1. Turn the ignition switch to ON (II).

2. Check for Pending or Confirmed DTCs with the HDS.

Are any other Pending or Confirmed DTCs indicated along with DTC P1891?

YES -

Go to step 3.

NO -

Go to step 4.

3. Check for Pending or Confirmed DTCs with the HDS.

Is the DTC P0796 indicated along with DTC P1891?

YES -

Replace the start clutch, then go to step 19.

NO -

Go to the indicated DTC's troubleshooting, and recheck.

4. Clear the DTC with the HDS.

5. Turn the ignition switch to LOCK (0).

6. Disconnect the solenoid wire harness 8P connector.

7. Start the engine. Shift the shift lever to D, and release the parking brake and brake pedal, then check if the vehicle moves.

Did the vehicle move?

YES -

Go to step 8.

NO -

Replace the start clutch, then go to step 19.

8. Turn the ignition switch to LOCK (0).

9. Reconnect the solenoid wire harness 8P connector.

10. Start the engine. Shift the shift lever to D, and check the creeping speed on level ground.

Is the creeping speed about 3 mph (5 km/h)?

YES -

Go to step 11.

NO -

Replace CVT clutch pressure control solenoid valve CVT Clutch Pressure Control Solenoid Valve Replacement, then go to step 18.

11. Park the vehicle on level ground, apply the parking brake, and block all four wheels securely.

12. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice).

13. Firmly press the brake pedal, and shift the shift lever to D.

14. While pressing the brake pedal firmly, press the accelerator for 6-8 seconds at full throttle, and measure the stall speed rpm in D.

Does the engine speed exceed 3,500 rpm?

YES -

Replace the start clutch, then go to step 19.

NO -

Go to step 15.

15. Turn the ignition switch to LOCK (0).

16. Disconnect the solenoid wire harness 8P connector.

17. Start the engine. Shift the shift lever to D, and release the parking brake and brake pedal, then check if the vehicle moves.

Did the vehicle move?

YES -

Go to step 22.

NO -

Replace the start clutch, then go to step 19.

18. Clear the DTC with the HDS.

19. Start the engine. Test-drive the vehicle at about 37 mph (60 km/h) for at least 1 minute.

20. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1891 indicated?

YES -

Check for poor connections or loose terminals between the CVT clutch pressure control solenoid valve and the PCM, then go to step 1.

NO -

Go to step 21.

21. Monitor the OBD STATUS for P1891 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 20, go to the indicated DTC's troubleshooting.�

NO -

If the HDS indicates FAILED, check for poor connections or loose terminals between the CVT clutch pressure control solenoid valve and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 19.

22. Reconnect all connectors.

23. Update the PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good PCM.

24. Start the engine. Test-drive the vehicle at about 37 mph (60 km/h) for at least 1 minute.

25. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1891 indicated?

YES -

Check for poor connections or loose terminals between the CVT clutch pressure control solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 24. If the PCM was substituted, go to step 1.

NO -

Go to step 26.

26. Monitor the OBD STATUS for P1891 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 Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 25, go to the indicated DTC's troubleshooting.�

NO -

If the HDS indicates FAILED, check for poor connections or loose terminals between the CVT clutch pressure control solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 24. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 24.