Easy entry/exit steering column adjustment, function - GF46.15-P-2001R

MODEL 230

Fig 1: Function Of Easy Entry/Exit, Steering Column Adjustment (Model 230)

Networking of components

Function prerequisites with ignition key

Function activated in instrument cluster
Ignition key withdrawn, or
Driver door opened and power to circuit 15R, or
Driver door opened and power to circuit 15c, or
Driver's door opened with key not in ignition

Function prerequisites with Keyless Go card (code 889)

Function activated in instrument cluster
Driver door opened and power to circuit 15R, or
Driver door opened and power to circuit 15c, or
Driver door opened

Easy entry/exit steering column adjustment, function

In order to make it easier to leave the vehicle, the driver's seat and the steering column are moved to an entry/exit position (seat back and steering column raised).

Adjustment to the entry/exit position is triggered by the ignition key position and door contact states.

While the "easy entry/exit" function is in operation, the "head restraint presetting" function is not carried out.

The following information is read in and processed by the driver-side front seat adjustment control module with memory (N32/1) via the passenger compartment CAN:

Rear SAM control module (N10/8) sends the status of the
left door contact switch (S17/3)
DI control module (N73) sends the status of the circuits
Instrument cluster (A1) sends easy entry/exit activated
Left door control module (N69/1) sends the status of the left seat adjustment switch group (S91/2) .

If all the requirements are fulfilled and if actuation is not aborted, the driver-side SAM control module (N10/10) actuates the height adjustment up/down motor (M20m2).

Abort conditions:

The left front seat adjustment control module with memory (N32/1) deactivates the easy entry and exit function if the driver presses one of the following switches:

a switch in the instrument cluster (A1)
steering column adjustment raise/lower, forward/back switch (S59/1s1)
one of the switches in the left seat adjustment switch group (S91/2)
left rear compartment access switch (S137)

If the driver deactivates the easy entry/exit function, this function can only be reactivated by the following operating states:

No circuit after circuit 15c
Circuit 15R after circuit 15

The easy entry/exit feature is only reinitiated if a valid state transition is available to trigger the easy entry/exit function.

Longitudinal adjustment of the seat to the entry/exit position is aborted by the left front seat adjustment control module with memory (N32/1) if the following errors occur:

Longitudinal seat adjustment denormalized
Longitudinal seat adjustment position sensor (Hall sensor) faulty

Abort due to contrary state transitions

Adjustment to the entry/exit position is aborted by the left front seat adjustment control module with memory (N32/1) if the following changes in the ignition key position and door contact status occur:

No circuit after circuit 15c
Circuit 15c after circuit 15R
Circuit 15R after circuit 15
Driver's door open after driver's door closed

Repeat limiter

Alternately inserting and removing the ignition key causes repeated back and forth movement between the easy entry/exit and driving positions (with door open: steering column only; with door closed: seat and steering column). To prevent this, the number of cycles is limited to 5. The counter is reset if

the ignition key is turned to circuit 15R, or
if the status of the driver's door changes.

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