flexible adaptation to different vehicle and engine
variants.
EMERGENCY RUNNING FUNCTION
In order to ensure a safe driving state and to pre-
vent damage to the automatic transmission, the TCM
control module switches to limp-home mode in the
event of critical faults. A diagnostic trouble code
(DTC) assigned to the fault is stored in memory. All
solenoid and regulating valves are thus de-energized.
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 deacti-
vated.
In order to preserve the operability of the vehicle
to some extent, the hydraulic control can be used to
engage 2nd gear or reverse using the following pro-
cedure:
•
Stop the vehicle.
•
Move selector lever to “P”.
•
Switch off engine.
•
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
appropriate scan tool. Sporadic faults can be reset
via ignition OFF/ON.
CLUTCH APPLICATION
Refer to CLUTCH APPLICATION 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
N/A
X
X
R
3.16
X*
X
X
X
R - Limp
In
1.93
X
X
X
* = The shift components required during coast.
VA
AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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