Manual Road Test Procedure

Manual Road Test Procedure
This procedure determines whether a problem lies in the electronic control system or in the transmission itself. This procedure tests the gears being used in the L, the 2, or the D ranges with the shift solenoids disconnected from the PCM.
1. Perform A Powertrain On Board Diagnostic (OBD) System Check in Engine Controls.
2. Start the engine and warm to normal operating temperature.
3. Turn the ignition switch to LOCK.
4. Disconnect the solenoid wire harness connector from the solenoid wire harness.
5. Start the engine.
6. On a level road, move the gear selector to the Low (L) position and accelerate the vehicle to 20 km/h (13 mph).
Observe that 1st gear is being used.
7. Move the gear selector to Second (2) position at 20 km/h (13 mph).
8. Accelerate to 40 km/h (25 mph). Observe that the transmission is in 3rd gear.
9. At 40 km/h (25 mph), shift the manual selector to the Drive (D) position.
10. Observe that the transmission is in 4th gear at speeds above 40 km/h (25 mph).
11. Stop the vehicle.
12. Shift to the Park (P) position and turn the ignition switch to LOCK.
13. Reconnect the solenoid wire harness connector
14. Turn the ignition switch to ON.
15. Clear DTCs with the scan tool.
16. Compare the results of this Manual Road Test Procedure with the Road Test Procedure described previously.
^ If the transmission operates normally with the electronic control system disabled, but malfunctions with the electronic control system connected, the problem lies in the electronic control system. Refer to the appropriate DTC test.
^ If the transmission is still malfunctioning with the electronic control system disabled, the problem lies in the transmission. Refer to the Manual Road Test Diagnosis table.