Full Throttle Downshift Test

Full Throttle Downshift Test

Power (P) Shift Mode
Test the power shift mode using the following procedure:
1. Operate the vehicle at 80km/h (50mph).
2. Verify the following conditions:
^ The manual selector is in the Drive (D) position
^ The OD switch is pressed
^ The Power/Normal switch is in the Power (P) position
3. Quickly press the accelerator pedal to the Wide Open Throttle (WOT) position.
4. Verify the following conditions:
^ The TCC releases.
^ The transmission immediately downshifts to second gear.

Normal (N) Shift Mode
Test the normal shift mode using the following procedure:
1. Operate the vehicle at 40 km/h (25 mph).
2. Verify the following conditions:
^ The manual selector is in the Drive (D) position
^ The OD switch is pressed
^ The Power/Normal switch is in the Normal (N) position
3. Quickly press the accelerator pedal to the Wide Open Throttle (WOT) position.
4. Verify the following conditions:
^ The TCC releases.
^ The transmission immediately downshifts to second gear.

Manual Downshift Test
1. At a vehicle speed of 80 km/h (50 mph), perform the following procedure:
1.1. Move the manual selector to the Drive (D) selector.
1.2. Press the OD switch.
1.3. Place the Power/Normal switch in the Power (P) position.
1.4. Release the accelerator pedal.
1.5. Release the OD switch.
1.6. Verify the following operating conditions:
^ The TCC releases.
^ The transmission downshifts immediately to third gear.
^ The engine reduces the vehicle speed.
2. At a vehicle speed of 48 km/h (30 mph), perform the following procedure:
2.1. Move the manual selector to the Drive (D) selector.
2.2. Release the accelerator pedal.
2.3. Move the manual selector to Second (2) gear.
2.4. Verify the following operating conditions:
^ The transmission downshifts immediately to second gear.
^ The engine reduces the vehicle speed.
2.5. If no engine braking is available, test for a faulty second coast brake.
3. At a vehicle speed of 24 km/h (15 mph), perform the following procedure:
3.1. Move the manual selector to the Drive (D) selector.
3.2. Release the accelerator pedal.
3.3. Move the manual selector to the Low (L) position.
3.4. Verify the following operating conditions:
^ The transmission downshifts immediately to first gear.
^ The engine reduces the vehicle speed.
3.5. If no engine braking is available, test for a faulty reverse band.