Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 523

MULTI-FUNCTION SWITCH

DESCRIPTION

The multi-function switch (2) is located on the steering
column, just below the steering wheel, within the
Steering Column Control Module (SCCM).

The only visible components of the multi-function
switch are the control stalk and control knob that
extend through the SCCM on the left side of the col-
umn. The remainder of the switch including its mount-
ing provisions, its electrical connection, and the turn
signal cancel actuator are concealed within the
SCCM.

Each of the switch controls has white International Control and Display Symbol graphics applied to it, which clearly
identify its many functions. Three integral locating posts on the switch housing, slide into channels in a receptacle
in the circuit board within the SCCM. A single integral connector receptacle in the circuit board connects the switch
to the vehicle electrical system through the instrument panel wire harness.

The multi-function switch provides the vehicle operator with a control interface for the following functions:

•

Front Washer Control - The multi-function switch control knob provides a momentary position for front washer
system operation.

•

Front Wiper Control - The multi-function switch control knob provides two continuous front wipe switch posi-
tions, low speed or high speed; and, an intermittent front wipe mode with six delay interval positions.

•

Headlamp Beam Selection - The multi-function switch control stalk provides detent switching for selection of
the headlamp high or low beams. There is also an intermediate momentary position that allows the headlamp
high beam circuits to be momentarily flashed to provide an optical horn feature (sometimes referred to as
flash-to-pass) as an optical signalling device.

•

Turn Signal Control - The multi-function switch control stalk provides momentary non-detent (lane change)
switching and detent switching with automatic cancellation for both the left and right turn signal lamps.

The multi-function switch cannot be adjusted or repaired. If any function of the switch is faulty, or if the switch is
damaged, the entire switch must be replaced as a unit (Refer to 19 - STEERING/COLUMN/STEERING COLUMN
CONTROL MODULE - DISASSEMBLY).

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LAMPS/LIGHTING - EXTERIOR - SERVICE INFORMATION

OPERATION

The multi-function switch operates as follows:

•

Front Washer Control - The control knob on the end of the multi-function switch control stalk is depressed
towards the steering column to momentarily activate the washer pump in the front washer mode. The washer
pump will continue to operate in the front washer mode until the control knob is released. The multi-function
switch provides an output by sending electronic front washer switch status messages to the Front Control Mod-
ule (FCM) over the Controller Area Network (CAN) data bus. The FCM responds by energizing or de-energiz-
ing the washer pump in the front washer mode.

•

Front Wiper Control - The control knob on the end of the multi-function switch control stalk is rotated to one
of the continuous front wiper detents, to one of six intermittent ( or auto wipe sensitivity positions if so
equipped) wiper detents, or to the Off position to select the front wiper mode. The multi-function switch pro-
vides an output by sending electronic front wiper switch status messages to the FCM over the CAN data bus.
The FCM responds by energizing or de-energizing the wiper on/off and high/low relays in the Power Distribu-
tion Center (PDC) for front wiper system control.

•

Headlamp Beam Selection - The control stalk of the multi-function switch is pushed toward the instrument
panel for a latching high beam selection. Pulling the stalk rearward toward the steering wheel for a latching low
beam selection. Each time the control stalk is actuated to the momentary position with the headlamps turned
off, the headlamp high beams will be illuminated for as long as the control stalk is held in this position. The
multi-function switch provides an output to the FCM over the CAN data bus. The FCM energizes or de-ener-
gizes the selected low or high beam circuits.

•

Turn Signal Control - The control stalk of the multi-function switch is moved upward to activate the right turn
signal circuitry, and, downward to activate the left turn signal circuitry. The turn signal switch has a detent
position in each direction that provides turn signals with automatic cancellation, and an intermediate, momen-
tary position in each direction that provides turn signals only until the control stalk is released. When the con-
trol stalk is moved to a turn signal switch detent position, the cancel actuator extends toward the center of the
steering column. A turn signal cancel cam that is integral to the clockspring rotates with the steering wheel and
the cam lobes contact the cancel actuator when it is extended from the multi-function switch. When the steer-
ing wheel is rotated during a turning maneuver, one of the two turn signal cancel cam lobes will contact the
turn signal cancel actuator. The cancel actuator latches against the cancel cam rotation in the direction oppo-
site that which is signaled. If the left turn signal detent is selected, the lobes of the cancel cam will ratchet past
the cancel actuator when the steering wheel is rotated to the left, but will unlatch the cancel actuator as the
steering wheel rotates to the right and returns to center, which will cancel the turn signal event and release the
control stalk from the detent so it returns to the neutral Off position. When a turn signal is activated, the multi-
function switch provides an output to the FCM over the CAN data bus. In addition, the message is sent to the
CCN via the CAN bus to activate the proper signal within the EMIC. The FCM energizes and flashes or de-
energizes the selected left or right turn signal circuits.

The multi-function switch can be diagnosed using a diagnostic scan tool and the appropriate diagnostic information.

LAMPS/LIGHTING - EXTERIOR - SERVICE INFORMATION

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REPEATER LAMP - EXPORT

REMOVAL

1. Push lamp (3) to the left and disengage lamp by

rotating it out of the metal around its left edge.

2. Remove lamp.

3. Rotate Socket out.

4. Remove Bulb.

INSTALLATION

1. Replace Bulb.

2. Engage right hook of lamp (3) into the sheet metal

(2 - note correct orientation of lettering on lens).

3. Rotate lamp in place until left side engages (light

audible click).

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LAMPS/LIGHTING - EXTERIOR - SERVICE INFORMATION

SWITCH - STOP LAMP

DESCRIPTION

The stop lamp switch (2) is located under the instru-
ment panel at the brake pedal arm. This switch con-
tains

three

internal

switches

controlling

various

functions of the vehicle, one of them controls opera-
tion of the vehicle’s brake lamps. Other functions of
the internal switches include speed control deactiva-
tion and brake sense for the ABS and the brake trans-
mission shift interlock.

OPERATION

The stop lamp switch has three internal switches used for various functions. Among these are:

•

Brake lamp actuation

•

Speed control deactivation, and

•

Brake sense for ABS and brake transmission shift interlock

When the brake pedal is in the released position, the plunger on the outside of the stop lamp switch is pushed
inward by the brake pedal. In this position, the electrical contacts for one internal switch are open while the electrical
contacts for other two internal switches are closed.

When the brake pedal is pressed, the plunger on the outside of the stop lamp switch extends outward. This action
closes the electrical contacts for the one internal switch and opens the contacts for the remaining two switches
within the stop lamp switch. The internal switch which closes when the brake pedal is pressed completes the circuit
to the brake lamps at the rear of the vehicle, thus allowing illumination of the brake lamps and the center-high-
mounted stop lamp (CHMSL).

DIAGNOSIS AND TESTING

STOP LAMP SWITCH

NOTE: Before proceeding with this diagnostic test, verify the adjustment of the stop lamp switch to rule out
misadjustment. (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/STOP LAMP SWITCH - ADJUST-
MENTS)

If the electrical circuit has been tested and the stop lamp switch is suspected of being faulty, it can be tested using
the following method.

LAMPS/LIGHTING - EXTERIOR - SERVICE INFORMATION

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