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OPERATION The transmission control is divided into the electronic and hydraulic transmission control functions. While the elec- The Transmission Control Module (TCM) allows for the precise adaptation of pressures to the corresponding oper- EMERGENCY RUNNING FUNCTION In order to ensure a safe driving state and to prevent damage to the automatic transmission, the TCM control mod- The net effect is: • The last engaged gear remains engaged. • The modulating pressure and shift pressures rise to the maximum levels. • The torque converter lockup clutch is deactivated. In order to preserve the operability of the vehicle to some extent, the hydraulic control can be used to engage 2nd • Stop the vehicle. • Switch off engine. • Move selector lever to “P”. • Wait at least 10 seconds. • Start engine. • Move selector lever to D: 2nd gear. • Move selector lever to R: Reverse gear. The limp-home function remains active until the DTC is rectified or the stored DTC is erased with the DRBIII T tool. Sporadic faults can be reset via ignition OFF/ON. CLUTCH APPLICATION Refer to the following table for which shift elements are applied in each gear position. CLUTCH APPLICATION GEAR RATIO B1 B2 B3 K1 K2 K3 F1 F2 1 3.59 X* X X* X X 2 2.19 X X X* X 3 1.41 X X X 4 1.00 X X X 5 0.83 X X X X* N X X R 3.16 X* X X X * = The shift components required during coast. ZH AUTOMATIC - NAG1 SERVICE INFORMATION 21 - 201 |