DTC Troubleshooting

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.

1. Turn the ignition switch to ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.

Are any other Temporary DTCs or 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. Warm up the engine 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. Shift the shift lever to D.
7. Keep pressing the brake pedal for 5 seconds.
8. Accelerate from a stop at over 40 % throttle, and test-drive the vehicle on a flat road at speeds about 37 mph (60 km/h) for at least 1 minute. Do not release the accelerator during the test-drive.
9. Slow down to a stop. After stopping, keep the brake pedal pressed for 5 seconds.
10. Check for Temporary DTCs or 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 11.

11. Park the vehicle on level ground, apply the parking brake, and block all four wheels securely.
12. Firmly press the brake pedal, and shift the shift lever to D.
13. 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 14.

14. Test-drive the vehicle on a flat road with the shift lever in D. Accelerate with 2.0 V of APP sensor voltage by monitoring the voltage with the HDS, and test-drive the vehicle speeds above 37 mph (60 km/h) for at least 1 minute.
15. 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.

NO - Replace the transmission.