Dynamic Testing - Engine ON

DESCRIPTION
Dynamic testing is the final step in the transmission tester usage. It allows the transmission to be proven out electronically and hydraulically.

PRELIMINARY SET UP
1. Slide MODE switch to DRIVE.
2. Turn GEAR SELECT dial to 1.
3. Transaxle range selector lever in PARK; parking brake ON.
4. START engine.

EPC SOLENOID
1. Observe line pressure. Record value. Line pressure should go to maximum. If not, REFER to the Diagnosis by Symptom Routines Symptom Related Diagnostic Proceduresor Pinpoint Test E concerning EPC solenoid. E: Electronic Pressure Control (EPC) Solenoid

Pressure Reference Chart No. 401:

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

2. Press EPC switch. Line pressure should drop to a minimum value. Record value. If not, REFER to the Diagnosis by Symptom Symptom Related Diagnostic Proceduresor Pinpoint Test E for the EPC solenoid. E: Electronic Pressure Control (EPC) Solenoid

TRANSAXLE ENGAGEMENTS
1. Verify that MODE switch is in DRIVE mode.
2. Turn GEAR SELECT dial to 1.
3. START engine.
4. Shift vehicle from PARK to REVERSE.
- Did vehicle shift into REVERSE?
- Was engagement firm?
5. Press EPC switch. Line pressure should drop to idle pressure. While holding EPC switch down, shift vehicle from PARK to REVERSE.
- Did vehicle shift into REVERSE?
- Was engagement smooth?
- Shift vehicle from REVERSE to PARK.
- Release EPC switch. Line pressure should rise to MAX pressure.
6. Shift vehicle from PARK to DRIVE.
- Did vehicle shift into DRIVE?
- Was engagement firm?
7. Shift vehicle from DRIVE to PARK.
8. Press EPC switch. Pressure should drop to idle pressure.
9. Press EPC switch. Line pressure should drop to idle pressure. While holding EPC switch down, shift vehicle from PARK to DRIVE.
- Did the vehicle shift from PARK to DRIVE?
- 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, the technician may not feel all shifts when engaged.
- LEDs will turn green when shift 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 shift lever to OVERDRIVE and accelerate to 24 km/h (15 mph). Select second gear by turning GEAR SELECT dial to 2.
- Did vehicle upshift to second gear?
- Did appropriate shift solenoids activate/deactivate?
2. Accelerate to 40 km/h (25 mph) and select third gear by turning GEAR SELECT dial to 3.
- Did vehicle upshift to third gear?
- Did appropriate shift solenoids activate/deactivate?
3. Accelerate to 56-72 km/h (35-45 mph) and select fourth gear by turning GEAR SELECT dial to 4.
- Did vehicle upshift to fourth gear?
- Did appropriate shift solenoids activate/deactivate?
4. Reverse the order to downshift.
- Did vehicle downshift from fourth to third, third to second, and second to first?

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

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

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

- Did converter engage?
- Did engine rpm drop?
- Did TCC solenoid activate?
- Did TCC solenoid deactivate when you released switch?

TURBINE SHAFT SPEED (TSS) SENSOR

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

1. Set voltmeter to 20 volts AC.
2. Connect voltmeter positive lead to the +TSS.
3. Connect voltmeter negative lead to the -TSS.
4. Slowly accelerate vehicle and monitor voltmeter.
- Did voltage increase with vehicle speed?
5. After you finish testing:
- If testing of the Transmission Range (TR) Sensor is not required, continue to Disconnecting the Tester.
- If testing of the TR is required, proceed to TR Sensor Testing. Testing and Inspection

DISCONNECTION THE TESTER
1. Disconnect transmission tester from transaxle connector.

CAUTION: Do not attempt to pry off connectors with a screwdriver. This will damage the connector and could result in a transaxle concern.

2. Reinstall vehicle wiring harness. Verify connection by pulling up on the harness.
3. Reinstall all heat shields that were previously removed.
4. Disconnect transmission tester power cable from vehicle.
5. Erase all DTC'S using procedures described in Powertrain Management.
6. Rerun On-Board Diagnostics (OBD) to receive a pass code.
7. Verify that the customer concern has been eliminate.