Dynamic Testing - Engine ON

DESCRIPTION
On Dynamic testing allows the transmission to be proven out electronically and hydraulically.

PRELIMINARY SET UP
1. Set BENCH/DRIVE switch to DRIVE mode.
2. Set gear select switch to first gear position.
3. Place vehicle in PARK (P).
4. Start engine.

EPC SOLENOID FUNCTIONAL TEST
1. Observe line pressure. Record value. Line pressure should go to maximum. If not, refer to the Diagnosis by Symptom routines for diagnostic tips or Pinpoint Test E concerning the EPC solenoid.
2. Press the EPC switch. Line pressure should drop to a minimum value. Record value. If not, refer to the Diagnosis by Symptom routines or Pinpoint Test E for the EPC solenoid.

CAUTION: Do not attempt to hold the EPC switch depressed (minimum line pressure and stall the transmission (holding the vehicle with the brake while depressing the throttle with the transmission in gear), as transmission damage will result.

TRANSMISSION ENGAGEMENTS
1. Verify that MODE switch is in DRIVE mode.
2. Turn GEAR SELECT dial to 1.
3. Start the engine.
4. Shift vehicle from PARK (P) to REVERSE (R).
- Did vehicle shift into REVERSE (R)?
- Was engagement firm?

5. Depress EPC switch. Line pressure should drop to idle pressure.
- While holding EPC switch down, shift vehicle from PARK (P) to REVERSE (R).
- Did vehicle shift into REVERSE (R)?
- Was engagement smooth?
- Shift vehicle from REVERSE (R) to PARK (P).
- Release EPC switch. Line pressure should rise to maximum pressure.

6. Shift vehicle from PARK (P) to DRIVE (D).
- Did vehicle shift into DRIVE (D)?
- Was engagement firm?

7. Shift vehicle from DRIVE (D) to PARK (P).
8. Depress EPC switch. Pressure should drop to idle pressure.
9. Depress EPC switch. Line pressure should drop to idle pressure.
- While holding EPC switch down, shift vehicle from PARK (P) to DRIVE (D).
- Did the vehicle shift from PARK (P) to DRIVE (D)?
- Was the engagement smooth?

10. Release EPC switch.

UPSHIFTS/DOWNSHIFTS
NOTE:
- Upshifts and downshifts will be firm during this procedure.
- Pressure gauges may be removed.
- These tests should be performed on the road. If performed on the hoist, feeling the shifts engage may not be possible.

LEDs will turn green when solenoids are activated and turn OFF when deactivated. Refer to the appropriate overlay for the proper status shift sequence of the shift solenoids during upshifts and downshifts.

1. Move transmission range selector lever into OVERDRIVE position and accelerate to 24 km/h (15 mph). Select second gear by rotating gear select switch to second gear position.
- Did vehicle upshift to second gear?
- Did appropriate shift solenoids activate or deactivate?

2. Accelerate to 40 km/h (25 mph) and select third gear position.
- Did vehicle upshift to third gear?
- Did appropriate shift solenoids activate or deactivate?
3. Accelerate to 56-72 km/h (35-45 mph) and select fourth gear position.
- Did vehicle upshift to fourth gear?
- Did appropriate shift solenoids activate or deactivate?

4. Reverse the order to downshift.
- Does vehicle downshift from fourth to third, third to second, and second to first?
- Did appropriate shift solenoids activate or deactivate?

5. Does the transmission pass these tests? If not, refer to Diagnosis by Symptom. Symptom Related Diagnostic Procedures

TORQUE CONVERTER CLUTCH (TCC) ENGAGEMENT
1. Accelerate and shift vehicle into third gear. Hold speed steady and press the MCCC switch.

CAUTION: Do not depress MCCC switch with transmission in gear and the vehicle at a stop. Damage to the torque converter clutch may result.

NOTE: This test should be performed on the road. If performed on a hoist, feeling the torque converter clutch engage may not be possible.

2. Check for the following conditions:
- Does the torque converter clutch engage?
- Does the engine rpm drop?
- Did torque converter clutch solenoid (TCC solenoid) activate?

3. Does the transmission pass these tests? If not, refer to Diagnosis by Symptom. Symptom Related Diagnostic Procedures

OUTPUT SHAFT SPEED (OSS) SENSOR FUNCTIONAL TEST
1. Set multimeter to 20 volts AC.

NOTE: This test may be performed on the hoist or on the road.

2. Connect multimeter positive lead to the OSS (+) jack.
3. Connect multimeter negative lead to the OSS (-) jack.
4. Slowly accelerate vehicle and monitor multimeter. Does voltage increase with vehicle speed?
5. If testing of the DTR sensor is not required, disconnect the tester. Transmission Range (TR) Sensor Testing

If DTR sensor testing is required, continue.