Test-Drive Schedule TCM-002E AW55-50/51SN

Perform the following test-drive:

NOTE: Read through the whole document before starting to test-drive.

Check the oil temperature in the transmission via read-out. Suitable temperature range is 40-65°C.
Vehicles with GearTronic lever carrier:
1. Perform the same step as above once more with the gear lever in GearTronic-position with 4th gear selected. Try also to keep the engine in the same engine speed range as during the previous check. In this position, slipping lock-up will not be possible, only locked lock-up. Then the indicator light will be on with a steady glow.
Start Activation of gear indication. See, Diagnostics/Vehicle communication/Advanced.
NOTE: The activation only applies during one driving cycle.

Vehicles with GearTronic lever carrier:
1. Perform the same step as above once more with the gear lever in GearTronic-position with 4th gear selected. Try also to keep the engine in the same engine speed range as during the previous check. In this position, slipping lock-up will not be possible, only locked lock-up. Then the indicator light will be on with a steady glow.
Drive the vehicle with light load, approx. 60 km/h (37 mph) in 4th gear (engine speed approx. 1600 RPM). Check status of lock-up via control light IND.
HINT: The problems occur at slipping lock-up (IND-light flashes).

Vehicles with GearTronic lever carrier:
1. Perform the same step as above once more with the gear lever in GearTronic-position with 4th gear selected. Try also to keep the engine in the same engine speed range as during the previous check. In this position, slipping lock-up will not be possible, only locked lock-up. Then the indicator light will be on with a steady glow.
When the IND-light flashes, throttle up slightly on a slight uphill grade. Pay attention to if a brief vibration occurs, and that slipping lock-up is turned off. The engine speed should increase by approx. 500 RPM.
Vehicles with GearTronic lever carrier:
1. Perform the same step as above once more with the gear lever in GearTronic-position with 4th gear selected. Try also to keep the engine in the same engine speed range as during the previous check. In this position, slipping lock-up will not be possible, only locked lock-up. Then the indicator light will be on with a steady glow.
Check if the vibrations follow the speed or if they are brief vibrations.

NOTE: It is likely that no new diagnostic trouble code will be stored as the diagnosis requires that the malfunction occurs during a number of driving cycles to enable storing of the diagnostic trouble.

Perform one of the alternatives below:

Vibrations occur both at slipping and locked lock-up: replace transmission.
See Gearbox, Removing
Vibrations only occur at slipping lock-up: replace torque converter.
Vibrations only occur at locked lock-up: replace transmission.
See Gearbox, Removing
Vibrations follow the speed:
Investigate other components, such as tire imbalance and similar.
No vibrations can be detected:
No further troubleshooting is required.