Start Clutch Pressure Control Calibration Procedures
Start Clutch Pressure Control Calibration ProceduresWhen the following parts are replaced or removed, the PCM must memorize the feedback signal for the start clutch pressure control system.
^ Battery
^ Back-up fuse
^ PCM
^ Transmission
^ Start clutch
^ Start clutch pressure control valve
^ CVT drive pulley pressure control valve
^ CVT driven pulley pressure control valve
^ Engine assembly
Start Clutch Pressure Control Calibration Procedure mode
1. Connect the HDS to the DLC (A), and go to the A/T Mode Menu.
NOTE: If the HDS does not communicate with the PCM, troubleshoot the DLC circuit.
2. Follow the HDS screen prompts in the Start Clutch Feedback Learn (see the HDS Operator's manual).
Calibration Procedure with SCS mode
1. Apply the parking brake, and block all four wheels securely.
2. Warm up the engine to normal operating temperature (the radiator fan comes on).
3. Make sure that the MIL does not come on and the D indicator does not blink. If the MIL comes on or the D indicator blinks, check the fuel and emissions system or the CVT control system.
4. Turn the ignition switch OFF.
5. Connect the HDS to the DLC, and follow the screen prompts to short-circuit the SCS signal terminal using the tester menu.
6. Press the brake pedal, and continue pressing the pedal until the calibration is completed.
7. Start the engine with no-load condition, but turn the headlights on, The headlights must be on during calibration.
8. Shift the shift lever to the N position, shift to D, S, then L, and return to the N position. Repeat this shifting pattern three times within 20 seconds after the engine is started.
9. Check that the D indicator comes on when the shift lever is in the N position, then goes off in one minute.
10. If the D indicator blinks or does not come on, or if the indicator comes on and stays on, turn the ignition switch OFF, and restart the procedure with step 5.
11. Shift to the D position, and check that the D indicator comes on, then goes off.
12. If the D indicator blinks or does not come on, or if the indicator comes on and stays on, turn the ignition switch OFF, and restart the procedure with step 5.
13. Turn the ignition switch OFF to complete the procedure.
14. Test-drive the vehicle to verify that a problem does not occur on the start clutch pressure control system.
Calibration by Driving the Vehicle
1. Warm up the engine to normal operating temperature (the radiator fan comes on).
2. Start the engine with no-load, then immediately turn the headlights on.
3. Drive the vehicle in the D position until the vehicle speed reaches 37 mph (60 km/h), then release the accelerator and decelerate without pressing the brake pedal for more than 5 seconds to reach completion.
4. Verify that a problem does not occur on the start clutch pressure control system.
Start Clutch Check
NOTE: If the transmission acts abnormally when the vehicle starts off, check the start clutch with the HDS.
1. Connect the HDS to the DLC (A), and go to the A/T Mode Menu.
NOTE: If the HDS does not communicate with the PCM, troubleshoot the DLC circuit.
2. Choose Data List in the A/T Mode Menu, and monitor the Start Clutch Status with the HDS.
^ If the HDS indicates Normal, the start clutch is OK, then disconnect the HDS.
^ If the HDS indicates Unchecked, go to step 5.
^ If the HDS indicates Judder1 or Judder2, replace the CVTF, then go to step 3.
3. Choose Start Clutch Status Data in Miscellaneous Test Menu, and clean the start clutch status with the HDS.
4. Choose Data List in A/T Mode Menu, and monitor the Start Clutch Status Diagnosis condition with the HDS.
^ If the HDS indicates Not ready, warm up the engine to normal operating temperature (the radiator fan comes on), then go to step 5.
^ If the HDS indicates Ready, go to step 5.
5. Start the engine, and shift to the D position while pressing the brake pedal.
6. Accelerate from a stop at over 50% throttle (with 2.25 V of APP sensor voltage by monitoring the HDS), then slow down to a stop.
7. Repeat step 6 two times.
8. Choose Data List in the A/T Mode Menu, and make sure that the Start Clutch Status is Normal with the HDS.
9. To verify that the engine stalling and the judder when starting off does not occur, test-drive the vehicle for several minutes.