P1890

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. Prepare the HDS to take a HIGH SPEED SNAPSHOT (refer to the HDS user's guide for more details if needed):

- Select High Speed icon.
- Select these parameters:
- Vehicle Speed
- Engine Speed
- APP Sensor A (V)

- Set the Trigger Type to Parameter.
- Adjust the Parameter setting for APP Sensor A (V) to 2.31 V.
- Set the recording time to 60 seconds.
- Set the Trigger point to -30 seconds.

13. Find a suitable level road. When you are ready to do the test, press OK with the HDS.

14. Shift the shift lever to D.

15. Monitor the HDS, and accelerate quickly until APP Sensor A reads 2.31 V. Maintain a steady throttle at 2.31 V until the vehicle reaches 37 mph(60 km/h), then slow the vehicle, and come to a stop.

16. Save the snapshot if the entire event was not recorded increase the recording time setting as necessary and repeat step 15.

17. Review the snapshot and compare APP Sensor A, Vehicle Speed, and Engine Speed.

Is the engine speed 1,800-2,400 rpm at 37 mph(60 km/h) with APP Sensor A at 2.31 V?

YES -

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

NO -

Replace the transmission.�