Automatic gearbox (Stepspeed Em-CVT) (Tests): Description and operation

TESTS

TEST 1: Fluid condition check

1. Drain and examine gearbox fluid. See Adjustments.
2. If fluid contains metallic particles, replace gearbox and flush fluid cooler and pipes.
3. If fluid is discoloured, burnt or contains water:

• Fill gearbox with correct fluid to the correct level.
• Test drive vehicle for at least 10 miles (16 km) using all selector positions.
• If fault is still present, replace gearbox.

4. If drained fluid is in good condition, re-check selector cable adjustment.
5. If adjustments are correct and the fault is still present, replace the gearbox. See Repairs.

TEST 2: Park/Neutral switch check

1. With engine stopped, disconnect multiplug from park/neutral switch.
2. Connect a circuit continuity tester between switch pins 4 and 2.
3. Move gear selector lever through all positions and observe continuity tester. Circuit continuity should only exist with selector in positions ’P’ and ’N’.
4. Disconnect continuity tester and reconnect between switch pins 3 and 1.
5. Move gear selector lever through all positions and observe continuity tester. Circuit continuity should only exist with selector in position ’R’.
6. If park/neutral switch does not function as described in steps 3 and 5, replace switch. See Repairs.

TEST 3: Kick-down check

A stop watch and the vehicle tachometer is required for this test.

1. With the gear selector lever in position ’D’, accelerate the vehicle up to 50 mph (80 km/h).
2. When 50 mph (80 km/h) is reached, release the accelerator pedal and, without using the brakes, allow the vehicle to decelerate to 38 mph (61 km/h).
3. When the vehicle has reached 38 mph (61 km/h) apply full throttle to initiate kick-down.
4. If engine speed is between 3800 and 4200 rev/min within 1 to 2 seconds of reaching 38 mph (61 km/h), kick-down operation is satisfactory.

TEST 4: Delayed shift response

A stop watch and the vehicle tachometer is required for this test.

1. With gear selector lever in position ’D’, apply full throttle until 50 mph (80 km/h) is reached.
2. At 50 mph (80 km/h) move the selector lever across the gate to the Sport position; the instrument pack LCD should display ’D^Sport’.
3. When selector lever is moved to the Sport position, the engine speed should increase to 5500 rev/min within 1 to 2 seconds. If this response is achieved gearbox shift operation is satisfactory.

TEST 5: Manual mode response

A stop watch and the vehicle tachometer is required for this test.

1. With the selector lever in position ’D Sport’, drive the vehicle at a steady 50 mph (80 km/h).
2. Release the throttle pedal and move the selector lever to the minus (-) position (manual mode). The instrument pack should display the gear ratio number and the engine speed should rise within 1 to 2 seconds. If this response is achieved, manual mode operation is satisfactory.