DTC Description (Command Valve Jams In Pressure Position)
- Fault Memory & Actuation Of MIL - MIL is turned on after 2 consecutive driving cycles with fault.
- Frequency Of Testing - Continuous.
- Checked Signal Or Status - Calculated gear ratios outside tolerance.
- Permissible Gear Ratio - -0.20 to 0.20 for 1st/2nd gear, -0.05 to 0.05 for 3rd gear, -0.03 to 0.03 for 4th/5th gear, -0.20 to 0.20 for reverse gear.
- Duration Of Test - Approximately 2 seconds.
- Test Conditions - Engine speed more than 400 RPM, output shaft speed more than 180 RPM (corresponds to approximately 12 MPH) and no shift process.
- Test Sequence - The shift pressure is slowly reduced after each shift process. Dragging when shift element pressure is reduced, command valve jams in pressure position. Dragging shift elements are recognized by the respective gear ratio.
NOTE:
The gear ratios are calculated from the following values; speed signal (n2), speed signal (n3) and output shaft speed (determined via rear wheel speed). Faults are recognized by the Electronic Transmission Control (ETC) module and sent to the ME-SFI control module via the Controller Area Network (CAN) data bus. The ME-SFI control module carries out fault memory and actuation of Malfunction Indicator Light (MIL). Also read out ETC fault memory for fault codes 51 and 52.