FUNCTION - Output Signals (Electromagnetic Clutch Control, Line Pressure Solenoid, Idle-up Relay)
AT-11prose procedureOUTPUT SIGNALS
A. Electromagnetic clutch control
NOTE
There are five output modes to ensure smooth operation of the electromagnetic clutch:
UNDER 200 RPM
Selector position-
Accelerator-
Active mode (vs. vehicle speed)(4) Reverse excitation mode
-
Selector positionN, P RANGE
Accelerator-
Active mode (vs. vehicle speed)(4) Reverse excitation mode
OVER 200 RPM
Selector positionD RANGE
AcceleratorRELEASED
Active mode (vs. vehicle speed)(3) Drag mode -> (5) Zero mode -> (2) Direct-coupling mode (depending on speed)
OVER 200 RPM
Selector positionDs, R RANGE
AcceleratorRELEASED
Active mode (vs. vehicle speed)(3) Drag mode -> (5) Zero mode -> (2) Direct-coupling mode (depending on speed)
OVER 200 RPM
Selector positionD RANGE
AcceleratorPRESSED
Active mode (vs. vehicle speed)(1) Starting mode -> (2) Direct-coupling mode
OVER 200 RPM
Selector positionDs, R RANGE
AcceleratorPRESSED
Active mode (vs. vehicle speed)(1) Starting mode -> (2) Direct-coupling mode
| Specification | Value |
|---|---|
| Vehicle speed threshold 1 | 7/8km/h |
| Vehicle speed threshold 2 | 8/12km/h |
| Vehicle speed threshold 3 | 16/20km/h |
| Vehicle speed threshold 4 | 18.5/22.5km/h |
| Vehicle speed threshold 5 | 30/35km/h |
Vehicle speed threshold 1
7/8km/h
Vehicle speed threshold 2
8/12km/h
Vehicle speed threshold 3
16/20km/h
Vehicle speed threshold 4
18.5/22.5km/h
Vehicle speed threshold 5
30/35km/h
1. Starting mode:
NOTE
Controls the clutch when pulling away by increasing current in proportion to engine speed and rate of increase of engine speed.
Decel/accel shock when travelling at low speed (below 20 km/h) is eliminated by delaying clutch "engagement" until the N-CVT input shaft speed coincides (almost) with engine speed.
2. Direct coupling mode:
NOTE
Directly couples the clutch when the vehicle reaches a preset speed.
3. Drag mode:
NOTE
Maintains good low speed (below 7 km/h) characteristics by passing a small current through the clutch (approx. 0.2A) to create a "drag torque" when the accelerator pedal is released. Also prevents "creeping" and "stalling" by continuously feeding idle speed signals back to the ECU.
4. Reverse excitation mode:
NOTE
Demagnetises the clutch powder (to remove residual magnetism and prevent non-releasing of the clutch) when:
- aThe selector lever is in "N" or "P".
- bEngine speed is 200 rev/min or less. This also prevents the vehicle from being push-started.
5. Zero mode:
NOTE
De-energises the clutch while the output mode is shifting from mode 2 to mode 3 as the accelerator pedal is released in "D", "Ds" or "R".
B. Line pressure solenoid control
NOTE
Controls line pressure solenoid to determine torque transmission.
C. Idle-up relay control
NOTE
Controls idle-up relay to maintain oil pressure during ABS operation.