ULEV Model

DTC P1890: Problem in Shift Control System
ULEV Model

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1. Check whether the scan tool or the HDS indicates another code.
Does the scan tool or the HDS indicate another code?
YES- Do the DTC Troubleshooting for the indicated code(s). Recheck for DTC P1890 after troubleshooting.
NO- Go to step 2.
2. Measure the stall speed rpm in the D position.
Is the stall speed over 3,500 rpm?
YES- Replace the transmission.
NO- If the stall speed is below 2,000 rpm, replace the CVT drive pulley pressure control valve and the CVT driven pulley pressure control valve. If the stall speed is 2,000 - 3,500 rpm, go to step 3.





3. Connect a digital multimeter to monitor TPS voltage between TCM connector terminals C9 and A23 or A24 or connect the HDS and display the transmission data list.
4. Test-drive the vehicle in the D position on a flat road at 37 mph (60 km/h) with TPS voltage 2.0 V constantly for several minutes, and check the engine speed.
Is the engine speed 2,200 - 3,100 rpm?
YES- Replace the CVT drive pulley pressure control valve, and the CVT driven pulley pressure control valve.
NO- Replace the transmission.