Code No. P1590: CVT-ECU to Engine-ECU Communication Error in Torque Reduction Request <CVT>

FUNCTION

• The engine-ECU monitors and checks communication with the CVT-ECU.
  

TROUBLE JUDGMENT

• Ignition switch is "ON" position.
  

• Engine-ECU detects an error in communication between engine-ECU and CVT-ECU.
  

FAIL-SAFE AND BACKUP FUNCTION

• Engine output is restricted.
  

PROBABLE CAUSE

• Failed engine-ECU
  

	Perform troubleshooting of CVT-ECU time-out. Check code No. U0101 CVT-ECU time-out (Refer to ).

	Go to Step 2.

	Replace the engine-ECU.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).