DTC Troubleshooting

DTC Troubleshooting: P1890 (42)

DTC P1890:

Problem in CVT Speed 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 simultaneously with DTC P1890?

YES -

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

NO -

Go to step 3.

3. Clear the DTC with the HDS.

4. Start the engine, and warm it up until the engine coolant temperature reaches 176 °F (80 °C).

5. Check the IMA battery level gauge in the gauge control module (tach).

Does the IMA battery level gauge indicate more than 4 segments?

YES -

Go to step 6.

NO -

Run the engine with the shift lever in P, at 3,500 rpm until the IMA battery level gauge indicates at least 4 segments, then go to step 6.

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

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

Are any DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.�

NO -

Go to step 6, and repeat the test-drive. If the HDS does not indicate a DTC after the test-drive has been done four times, go to step 8.

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

9. Start the engine.

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

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

Does the stall speed exceed 3,500 rpm?

YES -

Replace the transmission.�

NO -

Go to step 12.

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

13. Check the engine speed when vehicle speed is 37 mph (60 km/h).

Is the engine speed 2,350-2,950 rpm?

YES -

Intermittent failure, the system is OK at this time. If necessary, replace the CVTF, and recheck. CVT Fluid Replacement

NO -

Replace the transmission.�