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Home >> Nissan-Datsun >> 1994 >> Sentra (4 Door) L4-1597cc 1.6L DOHC MFI (GA16DE) >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Component Tests and General Diagnostics >> Road Testing >> Positions

Positions

ROAD TESTING
Perform road tests using "Symptom" chart.

"P" POSITION
1. Place selector lever in "P" position and start engine. Stop engine and repeat the procedure in all positions, including neutral position.
2. Stop vehicle on a slight upgrade and place selector lever in "P" position. Release parking brake to make sure vehicle remains locked.

"R" POSITION
1. Manually move selector lever from "P" to "R", and note shift quality.
2. Drive vehicle in reverse long enough to detect slippage or other abnormalities.

"N" POSITION
1. Manually move selector lever from "R" and "D" to "N" and note shift quality.
2. Release parking brake with selector lever in "N" position. Lightly depress accelerator pedal to make sure vehicle does not move. (When vehicle is new or soon after clutches have been replaced, vehicle may move slightly. This is not a problem.)

"D" POSITION





1. Manually shift selector lever from "N" to "D" position, and note shift quality.
2. Using the shift schedule as a reference, drive vehicle in "D" position. Record, on symptom chart, respective vehicle speeds at which up-shifting and down-shifting occur. These speeds are to be read at three different throttle positions (light, half and full), respectively. Also determine the timing at which shocks are encountered during shifting and which clutches are engaged.





3. Determine whether lock-up properly occurs while driving vehicle in proper gear position and at proper vehicle speed.
4. Check to determine if shifting to overdrive gear cannot be made while OD control switch is "OFF".
5. While driving vehicle in the 60 to 70 km/h (37 to 43 MPH) position in "D3" position at half to light throttle position, fully depress accelerator pedal to make sure transaxle downshifts from 3rd to 2nd gear.
6. While driving vehicle in the 25 to 35 km/h (16 to 22 MPH) ("D2" position) at half to light throttle position, fully depress accelerator pedal to make sure transaxle downshifts from 2nd to 1st gear.

"2" POSITION
1. Shift to "2" position and make sure vehicle starts in 1st gear.
2. Increase vehicle speed to make sure transaxle upshifts from 1st to 2nd gear.
3. Further increase vehicle speed. Make sure transaxle does not upshift to 3rd gear.
4. While driving vehicle at the 25 to 35 km/h (16 to 22 MPH) with throttle at half to light position ("22" position), fully depress accelerator pedal to make sure transaxle down- shifts from 2nd to 1st gear.
5. Allow vehicle to run idle while in "2" position to make sure that transaxle downshifts to 1st gear.
6. Move selector lever to "D" position and allow vehicle to operate at 30 to 40 km/h (19 to 25 MPH). Then, shift to "2" position to make sure transaxle downshifts to 2nd gear.

"1" POSITION
1. Place selector lever in "1" position and accelerate vehicle. Make sure transaxle does not shift from 1st to 2nd gear although vehicle speed increases.
2. While driving vehicle in "1" position, release accelerator pedal to make sure that engine compression acts as a brake.
3. Place selector lever in "D" or "2" position and allow vehicle to run at 15 to 25 km/h (9 to 16 MPH). Then move selector lever to "1" position to make sure transaxle downshifts to 1st gear.
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