Emergency Mode In The Event Of A Fault

An emergency program is activated to deal with the fault when the transmission control module (TCM) detects a transmission fault (permanent fault). If the transmission control module (TCM) detects a permanent fault, an emergency mode is activated. The transmission control module (TCM) then implements corrective action to protect the transmission, while leaving the car in the best possible drivable condition. Minor malfunctions do not activate an emergency program. There are different programs depending on the type of fault:

• Emergency mode
• Limp-home mode.

Emergency mode is activated for minor faults and the Limp-home mode for the most serious faults. If the malfunction is intermittent, the transmission control module (TCM) returns to normal operation the next time the ignition is switched on.

Emergency mode 

The warning lamp in the combined instrument panel comes on and a or text message is displayed for diagnostic trouble codes (DTCs) stored in the transmission control module (TCM).

The transmission shifts in all gears but transmits no signal to the lock-up solenoid. This means that lock-up is not available.

Limp-home mode 

The warning lamp in the combined instrument panel comes on or a text message is displayed for diagnostic trouble codes (DTCs) stored in the transmission control module (TCM).

The transmission control module (TCM) interrupts the activation of all solenoids. This means that no shifting is possible. The transmission operates only in 3rd gear in positions 3 and L, 4th gear in position D and reverse in position R. Shifting can only be carried out manually between 3rd and 4th gear and reverse gear.

No control of line pressure solenoids SLS and SLT. Maximum system pressure constantly which results in harsh upshifting and downshifting and harsher shifts when engaging P-R, N-R and N-D.