Chrysler Cirrus, Dodge Stratus, Plymouth Breeze Haynes. Instruction - page 36
12-16
Chapter 12 Chassis electrical system
SWITCH
POSITION
CONTINUITY
BETWEEN
RESISTANCE
VALUE
UNLOCK
1 and 4
2700 Ω ± 10%
LOCK
1 and 4
620 Ω ± 10%
26.5 Power door lock
switch terminal guide
and continuity chart
vehicle speed with a vacuum-actuated servo
motor located in the engine compartment,
which is connected to the throttle linkage by
a cable (see illustration). The system con-
sists of the Powertrain Control Module
(PCM), brake switch, control switches, a
relay, the vehicle speed sensor and associ-
ated wiring. Listed below are some general
procedures that may be used to locate com-
mon cruise control problems.
Check
2
If the system does not operate, check
the fuse (see Section 3). Also check the vac-
uum hose to the cruise control servo to make
sure it's not plugged, cracked or soft (which
will cause it to collapse in operation. With the
engine off, check the servo by applying vac-
uum (with a hand-operated vacuum pump) to
the vacuum fitting on the servo - the servo
should move the throttle linkage and hold
vacuum if it's working properly.
3
Have an assistant operate the brake
li ghts while you check their operation (voltage
from the brake light switch deactivates the
cruise control).
4
If the brake lights don't come on or
don't shut off the cruise control, correct the
problem and recheck cruise control opera-
tion.
5
Inspect the cable linkage between the
cruise control servo and the throttle linkage.
The cruise control servo is located on the left
(driver's) side of the vehicle.
6
Visually inspect the wires connected to
the cruise control servo and check for dam-
age and broken wires.
7
The cruise control on these vehicles use
two types of Vehicle Speed Sensors (VSS).
The VSS is located in the transaxle. Note:
Due to the complexity of diagnosing the Out-
put speed sensor on automatic transaxles,
this manual only addresses the VSS on man-
ual transaxles. However, you can still make
sure the electrical connector at the sensor is
clean and tight. Refer to Chapter 6 for infor-
mation on checking the VSS on manual
transaxles.
8
Test drive the vehicle to determine if the
cruise control is now working properly. If it
isn't, take it to a dealer service department or
an automotive electrical specialist for further
diagnosis and repair.
25 Electric rear view mirrors -
description and check
General description
1
Electric rear view mirrors use two
motors to move the glass; one for up-and-
down adjustments and one for left-to-right
adjustments. The motors are integral with the
mirror assembly and not serviceable.
Check
2
The control switch, located in the
driver's door panel, has a selector portion
which sends voltage to the left or right side
mirror. With the ignition ON but the engine
OFF, roll down the windows and operate the
mirror control switch through all functions
(l eft-right and up-down) for both the left and
right side mirrors.
3
Listen carefully for the sound of the
electric motors running in the mirrors.
4
If the motors can be heard but the mirror
glass doesn't move, there's probably a prob-
lem with the drive mechanism inside the mir-
ror. Remove and disassemble the exterior
mirror to locate the problem and correct if
possible (see Chapter 11).
5
If the mirrors don't operate and no
sound comes from the mirrors, check the
fuses (see Section 3).
6
If the fuses are OK, remove the door trim
panel (see Chapter 11).
7
Turn the ignition switch ON and check
for battery voltage at the mirror switch electri-
cal connector PINK wire terminal. Battery
voltage should be present. If there's no volt-
age at the switch, check for an open or short
in the wiring between the fuse panel and the
switch and repair the circuit (see Section 31).
Note: It's common for wires to break in the
portion of the harness between the body and
door (opening and closing the door fatigues
and eventually breaks the wires).
8
If voltage is present, connect a jumper
wire from the BLACK wire terminal to a good
ground on the chassis. Use another fused
jumper wire and connect the PINK wire termi-
nal to each one of the other terminals with the
ignition switch ON (engine OFF). If the mirror
motor operates, replace the switch. If the mir-
ror does not respond, replace the discrepant
mirror assembly (see Chapter 11).
26 Power door lock system -
description and check
General description
1
Power door lock systems are operated
by bi-directional solenoids located in each
door latch. The lock switches have two oper-
ating positions: Lock and Unlock. These
switches connect voltage to the door latch
solenoids. Depending on which way the
switch is activated, it reverses polarity, allow-
ing the two sides of the circuit to be used
alternately as the feed (positive) and ground
side.
Check
Refer to illustration 26.5
2
Check the fuses (see Section 3).
3
Operate the door lock switches in both
directions (Lock and Unlock) with the ignition
ON (engine OFF). Listen for the click of the
solenoid operating.
4
If there's no click, check for voltage at
the switches. If no voltage is present, check
the wiring between the fuse panel and the
switches for continuity.
5
If voltage is present but no click is
heard, remove the door trim panel (see Chap-
ter 11). Using an ohmmeter and the accom-
panying chart, check for continuity between
the switch terminals with the switch in each
position (see illustration). Replace the
switch if the resistance value is not as speci-
fied.
6
With the ignition ON (engine OFF), use a
voltmeter to check for battery voltage to the
switch electrical connector at the PINK wire
terminal. Repair the wiring if voltage is not
present.
7
If the switch is OK and voltage is pre-
sent but the solenoid still doesn't click, check
the wiring between the switch and solenoid
for continuity. Repair the wiring if there's no
continuity.
8
Using a voltmeter, check for battery
voltage at the solenoid electrical connector;
with the ignition switch ON (engine OFF)
operate the lock switch. One of the wires
should have voltage in the Lock position; the
other should have voltage in the Unlock posi-
tion. If voltage is present, replace the door
latch assembly (see Chapter 11). If the inop-
erative solenoid isn't receiving voltage, check
for an open or short in the wire between the
switch and the solenoid. Note: It's common
for wires to break in the portion of the harness
between the body and door (opening and
closing the door fatigues and eventually
breaks the wires).
27 Power window system -
description, check and window
motor replacement
General description
1
The power window system consists of
the circuit breaker, control switches, the
motors, glass mechanisms (regulators), and
Chapter 12 Chassis electrical system
12-17
27.9b Remote power window switch terminal guide and
continuity chart
SWITCH
Position
CONTINUITY
BETWEEN
TERMINALS
CONTINUITY
BETWEEN
TERMINALS
OFF
PIN 10 to 2
PIN 10 to 3
PIN 10 to 4
PIN 10 to 7
PIN 10 to 8
PIN 10 to 9
PIN 10 to 11
PIN 10 to 12
UP
DRIVER'S
PIN 1 to 7
PIN 8 to 10
UP
RIGHT
PIN 1 to 12
FRONT
PIN 10 to 11
UP
LEFT
PIN 3 to 10
REAR
PIN 1 to 2
UP
RIGHT
PIN 1 to 4
REAR
PIN9to 10
DOWN DRIVER'S
PIN 1 to 8
PIN7to10
DOWN RIGHT
PIN 1 to 11
FRONT
PIN 10 to 12
DOWN LEFT
PIN 3 to 1
REAR
PIN 2 to 10
DOWN RIGHT
PIN 1 to 9
REAR
PIN 4 to 10
WINDOW LOCK
PIN 1 to 5
27.9a Power window master (driver's) switch terminal guide and
continuity chart
SWITCH
POSITION
associated wiring.
2
Power windows are wired so they can
be lowered and raised from the master con-
trol switch by the driver or by remote
switches located at the individual windows.
Each window has a separate motor which is
reversible. The position of the control switch
determines the polarity and therefore the
direction of operation.
3
The power window system will operate
only when the ignition switch is in the ON
position.
Check
Refer to illustrations 27.9a and 27.9b
4
These procedures are general in nature,
so if you can't find the problem after perform-
ing them, take the vehicle to a dealer service
department or other qualified repair shop for
further diagnosis and/or repair.
5
If the power windows don't work at all,
check the circuit breaker continuity (see Sec-
tion 3).
6
If the circuit breaker is OK, remove the
door trim panel from the driver's door (see
Chapter 11).
7
With the ignition ON (engine OFF), use a
voltmeter to check for battery voltage to the
master switch electrical connector at the TAN
wire terminal. Note: Battery voltage should
also be present at one terminal on each
remote switch. Repair the wiring if voltage is
not present.
8
If one window is inoperative from the
master control switch, try the control switch
located at that window. Note: This doesn't
apply to the driver's door window.
9
If a window works from one switch, but
not the other, remove the door trim panel
(see Chapter 11) and check the switch for
continuity. Use an ohmmeter and the accom-
panying chart to check for continuity
between the switch terminals with the switch
in each position (see illustrations). Replace
the switch if continuity is not as specified.
10 If the switch tests OK, check for a short
or open circuit in the wiring between the
affected switch and the window motor.
11
If one window is inoperative from both
switches, remove the trim panel from the
affected door (see Chapter 11) and check for
voltage at the motor while the switch is oper-
ated.
12 If voltage is reaching the motor, discon-
nect the glass from the regulator (see Chap-
ter 11). Move the window up and down by
hand while checking for binding and damage.
Also check for binding and damage to the
regulator. If the regulator is not damaged and
the window moves up and down smoothly,
replace the motor (see below). If there's bind-
ing or damage, lubricate, repair or replace
parts, as necessary.
13 If voltage isn't reaching the motor and
switch continuity is OK, check the wiring in
the circuit for continuity between the interior
fuse block and the switch, master switch to
remote switch, and local switch to the win-
dow motor. Note: It's common for wires to
break in the portion of the harness between
the body and door (opening and closing the
door fatigues and eventually breaks the
wires).
14
Test window operation after you are fin-
ished to confirm proper repairs.
Window motor - replacement
Refer to illustration 27.17
Warning: Do not remove the window motor
from the regulator assembly without first
clamping the sector gear to the mounting
plate or serious personal injury may result.
The sector gear is spring loaded.
15
Remove the window regulator (see
Chapter 11).
16
Using a C-clamp or locking pliers, clamp
the sector gear to the mounting plate.
17
Remove the bolts securing the motor
and remove it from the regulator (see illus-
tration).
18 Installation is the reverse of removal.
28 Power seats - description and
check
General description
1
Power seats allow you to adjust the
position of the seat with little effort. The
optional power seats on these vehicles adjust
8 ways; forward and backward, up and
down, tilt forward and backward, and recline
up and down.
2
The power seat system consists of four
individual electric motors, the seat switch, a
12
12-18
Chapter 12
Chassis
electrical
system
SWITCH POSITION
CONTINUITY
BETWEEN
OFF
1-2, 1-3,
1-6, 1-7,
1-9, 1-10
1-4,
1-8,
SEATBACK RECLINER UP
5-2, 1-4
SEATBACK RECLINER DOWN
5-4, 1-2
SEAT BACKWARD
5-3, 1-6
SEAT FORWARD
5-6, 1-3
FRONT RISER UP
5-4, 1-10
FRONT RISER DOWN
5-10, 1-7
REAR RISER UP
5-8, 1-9
REAR RISER DOWN
5-9, 1-8
20 amp circuit breaker (located in the interior
fuse block), a 40 amp fuse located in the
Power Distribution Center and the wires that
connect them.
Check
Refer to illustration 28.8
3
These procedures are general in nature,
29.1a The driver's side airbag (arrow) is
located in the steering column horn pad
so if you can't find the problem after perform-
ing them, take the vehicle to a dealer service
department or other qualified repair shop for
further diagnosis and/or repair.
4
First, look under the seat for any objects
which may be caught in the seat mechanism
preventing the seat from moving.
5
Check the circuit breaker continuity (see
Section 3).
6
In a quiet place, operate the seat switch
and listen for motor actuation. If you can hear
the motors, but the seat doesn't move,
something is jammed in the mechanism or
the mechanism itself is damaged. Repair or
replace parts as necessary.
7
If the motors don't make any sound,
check for battery voltage at the seat switch
connector RED wire. Battery voltage should
be present, if it isn't, repair the wiring.
8
If voltage is present at the RED wire,
remove the seat switch and check it for conti-
nuity in all operating positions (see illustra-
tion). Replace the switch if any position does
not have continuity as specified.
9
If the switch is OK, check the operation
of each individual motor. Disconnect the
electrical connector from the motor. Using
fused jumper wires, apply battery voltage to
the motor electrical connector. The motor
should operate. Reverse the polarity of the
voltage applied. The motor should operate in
the opposite direction. If the motor fails to
respond as noted, replace the motor(s).
10 If the switch is OK and the motors are
operational, an open circuit exists between
the switch and the motor(s). Repair the wiring
as required.
General description
Refer to illustrations 29.1a, 29.1b and 29.1c
These models are equipped with a Sup-
plemental Restraint System (SRS), more
commonly called an airbag system. This sys-
tem is designed to protect the driver and
front seat passenger from serious injury in the
event of a collision. It consists of airbag mod-
ules in the center of the steering wheel and
the right side top surface of the dashboard
(see illustrations). The Airbag Control Mod-
ule (ACM), which is mounted on the floorpan
between the shift lever and the parking brake
lever under the center console, controls the
system and also incorporates the impact
sensor (see illustration).
Airbag modules
Each airbag module contains a housing
incorporating the cushion (airbag) and inflator
unit. The inflator assembly is mounted on the
back of the housing over a hole through
which gas is expelled, inflating the bag
almost instantaneously when an electrical
signal is sent from the system. The steering
column incorporates a specially wound wire
called a clockspring that carries this signal to
the module regardless of the steering wheel
position. The clockspring is a flat, ribbon-like
electrically conductive tape which is wound
so that the steering wheel can be rotated to
any position without ever loosing electrical
contact.
10
0
28.8 Power seat switch
29
Airbag system - general
terminal guide and
continuity chart
information
29.1b The passenger's airbag (arrow) is located on the dashboard
above the glove box
29.1c The Airbag Control Module is located under the center
console and mounted to the floorpan
Chapter 12 Chassis electrical system
12-19
I mpact sensor
The system has one impact sensor
located inside the Airbag Control Module
(ACM). The impact sensor acts as a threshold
sensitive switch that completes an electrical
circuit during an impact of sufficient G-force.
When the circuit is completed, the airbags
inflate.
Airbag Control Module (ACM)
The ACM also contains the safing sen-
sor, a capacitor that maintains an electrical
charge strong enough to deploy the airbags
which lasts approximately two minutes after
the battery power has been disconnected.
Additionally, the ACM incorporates an on-
board microprocessor which monitors the
operation of the system. It checks this sys-
tem every time the vehicle is started, causing
the AIRBAG light to go on, then off, if the sys-
tem is operating properly. If there is a fault in
the system, the light will go on and stay on, or
the light will fail to go on, and the ACM will
store fault codes indicating the nature of the
fault. If the AIRBAG light does go on and stay
on, the vehicle should be taken to your dealer
immediately for service.
Disabling the airbag system
Whenever working in the vicinity of the
center console, steering column or instru-
ment panel the airbags must be disarmed. To
disable the airbag system, perform the fol-
lowing steps:
a) Make sure the steering wheel is in the
straight-ahead position, turn the ignition
key to the Lock position and remove the
key.
b) Disconnect and isolate the negative bat-
tery cable from the ground stud on the
left shock tower (see Chapter 5, Sec-
tion 1).
c) Wait at least two minutes for the backup
power supply to be depleted before
beginning work.
Enabling the system
To enable the airbag system, perform
the following steps:
a) Make sure the steering wheel is in the
straight-ahead position, the ignition
switch is in the Lock position and the
key is removed.
b) Connect the negative battery cable to
the ground stud on the left shock tower.
c) Turn the ignition switch to the On posi-
tion. Observe the airbag warning light, it
should glow for approximately 6 to 8
seconds then go out, indicating the sys-
tem is functioning properly
30 Compass/temperature Mini-Trip
Computer self diagnosis (if
equipped)
General description
1
The Compass/temperature Mini-Trip
Computer (CMTC) is capable of performing a
self-check on it's internal functions. When
activated, the CMTC will illuminate all seg-
ments of the vacuum florescent (VF) display
and indicate it's status. Upon completion of
the internal check, the CMTC will display one
of the following: PASS, FAIL or CCD. Due to
the complexity of diagnosing and replacing
the CMTC or related components, this check
should be used for indication purposes only.
If anything but PASS is displayed after the
test is performed, have the vehicle diag-
nosed/repaired at a dealer service depart-
ment or other qualified repair shop.
Starting the self-diagnosis
2
With the ignition switch in the OFF posi-
tion, simultaneously depress the US/M and
STEP buttons.
3
While holding the buttons down, turn
the ignition switch to the ON position. The
CMTC will begin diagnosis and display one of
the following:
a) PASS: All functions operational - system
OK
b) FAIL: The CMTC module is faulty and
should be replaced
c) CCD: A CCD bus connection or the
Body Control Module is faulty
31
Wiring diagrams
1
Since it isn't possible to include all
wiring diagrams for every year covered by
this manual, the following diagrams are those
that are typical and most commonly needed.
2
Prior to troubleshooting any circuits,
check the fuse and circuit breakers (if
equipped) to make sure they're in good con-
dition. Make sure the battery is properly
charged and check the cable connections
(see Chapter 1).
3
When checking a circuit, make sure that
all connectors are clean, with no broken or
loose terminals. When unplugging a connec-
tor, do not pull on the wires. Pull only on the
connector housings themselves.
12
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Chapter 12 Chassis electrical system
Engine control system - 1995 and 1996 four-cylinder models (1 of 4)
Chapter 12 Chassis electrical system
12-21
Engine control system - 1995 and 1996 four-cylinder models (2 of 4)
12
12-22
Chapter 12 Chassis electrical system
Engine control system - 1995 and 1996 four-cylinder models (3 of 4)
Chapter 12 Chassis electrical system
12-23
Engine control system - 1995 and 1996 four-cylinder models (4 of 4)
12