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 along 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 to normal operating temperature (the radiator fan comes on twice).

5. Check the SOC in the Data List with the HDS.

Does the SOC indicate more than 50%?

YES -

Go to step 6.

NO -

Start the engine with the shift lever in P or N, hold it at 3,500 rpm until the SOC indicates at least 50%, 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 the 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 2.3 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 2.3 V. Maintain a steady throttle at 2.3 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 12.

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

Is the engine speed 2,150-2,750 rpm at 37 mph (60 km/h) with APP Sensor A at 2.3 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.�