1993 CHEVROLET PLYMOUTH ACCLAIM display

DIAGNOSTIC TESTING USING FAULT CODES
For diagnostic testing when using the fault codes,
refer to Fig.9 through 13.
DRB II DIAGNOSTIC TESTER
TESTING FAULT CODES
A more accurate device to retrieve fault codes is
Diagnostic Tool (DRB II). This diagnostic tool,
plugged into the diagnostic connector (Fig. 7) located
near the battery, will display fault descriptions. The
DRB II also can test various circuits and component
functions. Refer to the instructions provided with the
(DRB II) tool being used. Descriptions of Fault Codes
for other vehicle systems can be found in the General
Diagnosis sections of Group 14, Fuel System.
Fig. 8 Generator Fault Codes
8A - 24 BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS Ä

BATTERY/STARTER/GENERATOR SERVICE
CONTENTS
page page
BATTERY REMOVAL, INSTALLATION AND SERVICE ............................. 1
GENERATOR ............................ 9 SPECIFICATIONS
....................... 12
STARTER ............................... 4
BATTERY REMOVAL, INSTALLATION AND SERVICE
GENERAL INFORMATION
This first section will cover Battery replacement and
service procedures only. For Battery diagnostic proce-
dures, refer to Group 8A, Battery/Starting/Charging
Systems Diagnostics. Factory installed batteries (Fig. 1) do not have re-
movable battery cell caps. Water cannot be added to
factory installed battery. Battery is sealed, except for
small vent holes in the top. Chemical composition
inside the battery produces an extremely small amount
of gases at normal charging voltages. The factory
installed battery is equipped with a test indicator that
displays a colored ball to show the battery's state of
charge.
² Green Indicator = Full charge
² Black Indicator = Discharged
² Yellow Indicator = Battery replacement required.
BATTERY VISUAL INSPECTION AND SERVICE
(1) Make sure ignition switch is in OFF position and
all accessories are OFF. (2) Disconnect and remove the battery cable termi-
nals from the battery posts. Remove negative cable
first (Fig. 2). WARNING: TO PROTECT THE HANDS FROM BAT-
TERY ACID, A SUITABLE PAIR OF HEAVY DUTY
RUBBER GLOVES, NOT THE HOUSEHOLD TYPE,
SHOULD BE WORN WHEN REMOVING OR SERVIC-
ING A BATTERY. SAFETY GLASSES ALSO SHOULD
BE WORN.
(3) Lift battery heat shield off battery, if equipped
(Fig. 3). (4) Remove battery hold down nut and clamp.
Fig. 1 Maintenance Free Battery
Fig. 2 Remove Battery Cables
Fig. 3 Battery Hold-Down
Ä BATTERY/STARTER/GENERATOR SERVICE 8B - 1

OVERHEAD CONSOLE
CONTENTS
page page
AA BODY .............................. 1
AC AND AY BODY ....................... 6 AG AND AJ BODIES
.................... 13
AP BODY ............................. 21
GENERAL INFORMATION AA BODY
INDEX
page page
Ambient Temperature Sensor ................ 6
Compass Calibration ....................... 2
Compass Diagnostics ...................... 5
Compass Module Replacement ............... 6
Demagnetizing Procedure ................... 4 Map Reading Lamps
....................... 1
Overhead Console Replacement .............. 5
Self-Diagnostic Test ....................... 5
Thermometer and Compass Operation ......... 1
Variance ................................ 2
MAP READING LAMPS
The map reading and rear passenger lamps are
turned on and off by pressing their individual switch
marked LAMP. These same lamps also serve as cour-
tesy lamps whenever a door is opened, the illumi-
nated entry system is activated, or the headlamp
switch is turned fully clockwise.
LAMP REPLACEMENT
(1) Remove lens by inserting a large paper clip or
wire, with a hook on the end, into the hole in the
lens and pull downward (Fig. 1).
(2) Remove lamp by pulling firmly toward front of
vehicle. (3) Install new lamp by pushing firmly into recep-
tacle. (4) Snap lens into position taking care to orient
the tabs on the lens with the slots in the housing and
snap into position.
LAMP TEST
(1) Close vehicle doors.
(2) Press each lamp switch button (Fig.2). Right
hand button should light passenger side lamp and
left hand button should light drivers side lamp front
or rear. (3) If any of the lamps fail to illuminate, open ve-
hicle doors: (a) If lamp does not illuminate check for a
burned out lamp. If lamp is OK, check fuse and
wire connectors. (b) If lamp illuminates when doors are open
check switch.
THERMOMETER AND COMPASS OPERATION
The ignition switch must be in the ON or ACCES-
SORY position before the temperature and compass
reading can be displayed. The Comp/Temp switch, lo-
cated left of the display module, turns the display on
and off. The US/Metric switch, located right of the dis-
play, changes the temperature reading from Fahrenheit
to Celsius. Should the compass blank out and the CAL
symbol only light, demagnetizing may be necessary.
The compass is a flux-gate system which, is inte-
gral to the console. The temperature readout is con-
nected to a thermistor sensor which, located on the
front lower radiator closure panel.Fig. 1 Overhead Console Lens Removal
Ä OVERHEAD CONSOLE 8C - 1

When the vehicle is standing still, engine compart-
ment temperature may be radiated to the tempera-
ture sensor. Therefore the most accurate ambient
temperature readings are displayed when the vehicle
is moving in a forward motion. When the ignition switch is turned off the last dis-
played temperature reading stays in memory. When
the ignition switch is turned on again the thermom-
eter will display the memory temperature for 1
minute; then update the display to the actual tem-
perature within 5 minutes. Refer to Compass and
Thermometer Diagnosis (Fig. 3).
COMPASS CALIBRATION
The compass unit automatically calibrates itself as
the vehicle is driven; therefore, no calibration should be
required. When the compass is first powered up, the
CAL light on the display should be on. The CAL light
will go off and the compass will be accurate after the
vehicle completes one to three complete circles.
Do not attempt to set the compass near large metal
objects, such as, other vehicles, large buildings, or
bridges. If the vehicle's compass headings are inaccurate,
the compass also can be manually calibrated using
the following procedures: (1) Depress and hold down both the Comp/Temp
button and the U.S./Metric button. (2) The display will go off and after 5 seconds the
VAR light will come on. Continue to hold both but-
tons down. (3) In approximately 10 seconds, the CAL light
will come on. Release both buttons and the display
will show the heading and outside temperature. (4) Release buttons the CAL light will then go off,
showing the compass is calibrated. (5) The variation may need to be adjusted. The
variation is the difference between magnetic north
and true north. To set variation refer the to Varia-
tion Setting Procedure. If the compass portion of the display is not lit or
compass readings are not accurate after calibration.
The vehicle may have too much magnetism for the
compass to be accurate or the compass circuitry is
not working properly. Refer to Variance Procedure,
Demagnetizing Procedure and/or Compass Diagnos-
tics.VARIANCE
Variance is the difference between magnetic North
and geographic North. In some areas the difference
between magnetic and geographic north is great
enough to cause the compass to give false readings. If
this occurs, the variance must be set.
Fig. 2 Map Lamp Diagnosis
8C - 2 OVERHEAD CONSOLE Ä

VARIANCE SETTING PROCEDURE
There are two methods for setting variance while
in variance set mode. If the CAL symbol is on proce-
dure 2 must be used.
PROCEDURE 1
(1) Turn ignition switch to the on position.
(2) Press and hold the Comp/Temp button till the
display is turned OFF. (3) While continuing to hold Comp/Temp button
depress and hold US/Metric button until the VAR
symbol lights in approximately 5 seconds. (4) Release buttons.
(5) To determine the zone number which, corre-
sponds with your geographic area refer to Fig. 4.
(6) Press the US/Metric button until the zone num-
ber matches the display. (7) Press the Comp/Temp button to finish setting
of variation. (8) Variation is complete.
PROCEDURE 2 (1) Move away from any large metal objects like
buildings, or bridges. With the engine running and
the doors closed point vehicle true north. (2) Press and hold Comp/Temp button. The display
will go blank. (3) While continuing to hold Comp/Temp button
depress and hold the US/Metric button until the
VAR symbol lights in approximately 5 seconds. (4) Release buttons.
(5) Press the Comp/Temp button to finish setting
of variation. (6) Variation is complete.
DEMAGNETIZING PROCEDURE
Do not attach magnetic devices, such as magnetic
CB antennas to the vehicle roof, as they can cause
the compass to give false readings. Every vehicle has its own magnetic field. This
magnetic field is created by the various processes a
steel roof goes through when the vehicle is built. A
magnetic field also can be created if the roof is sub-
jected to A magnet, example:
² Magnetic c.b. antenna
² Magnetic tipped screwdriver and etc.
If the roof becomes magnetized use a demagnetiz-
ing Tool 6029 to demagnetize the roof. In this demagnetizing procedure you will use the
demagnetizing tool to demagnetize the roof and
mounting screws in the overhead console. It is impor-
tant that you follow the instructions below exactly.
The mounting screws and the mounting brackets
around the compass area are steel, and therefore aid
in the degaussing of the roof panel. (1) Be sure the ignition switch is in the OFF posi-
tion before you begin the demagnetizing procedure. (2) Open the sun glass compartment to gain access
to the overhead console mounting screws. (3) Plug the demagnetizing tool into a standard
110/115 volt AC outlet, keeping the demagnetizing
tool at least 12 inches away from the compass area
when plugging it in. (4) Slowly approach the console mounting screw
with the plastic coated tip of the tool for at least 2
seconds. (5) With the demagnetizing tool still energized,
slowly back it away from the screw until the tip is at
least 12 inches from the screw head. (6) After you have pulled at least 12 inches from
the last screw, remove the demagnetizing tool from
inside of the vehicle and disconnect it from the elec-
trical outlet. (7) Place an 8 1/2 in. X 11 in. piece of paper
lengthwise on the roof of vehicle directly above com-
pass. The purpose of the paper is to protect the roof
panel from scratches and define the area to be de-
magnetized.
Fig. 4 Variance Settings
8C - 4 OVERHEAD CONSOLE Ä

(8) Plug in the demagnetizing tool, keeping it at
least 2 feet away from the compass unit. (9) Slowly approach the center of the roof panel at
the windshield with the demagnetizing tool plugged
in.
² Contact the roof panel with the tip of the tool.
² Using slow sweeping motions of 1/2 inch between
sweeps
² Move the tool approximately 4 inches either side of
the centerline, and at least 11 inches back from the
windshield. (10) With the demagnetizing tool still energized,
slowly back away from the roof panel until the tip is
at least two feet from the roof before unplugging the
tool. (11) Recalibrate compass.
COMPASS DIAGNOSTICS
To place the unit into the diagnostics mode, turn
the vehicle ignition off. Depress the Comp/Temp but-
ton while turning on the ignition/run switch. The
display will then show DO. There are three tests that
can be performed when in the diagnostics mode.
Press the U.S./Metric button to choose test desired
(Fig. 5).
Test 1 (d1) determines the magnetic field strength
at the compass. The compass displays compensation
numbers which, correspond to the current magnetic
field strength at the compass. The letter N is dis-
played in the compass portion of the display. While a
number which, corresponds to the magnetic field
strength in the North/South direction is displayed.
The temperature portion of the display or the letter
W is displayed in the compass portion of the display. A number which, corresponds to the magnetic field
strength in the East/West direction is displayed in
the temperature portion of the display. For proper
compass operation the numbers should be between 1
and 14. A number of 7 or 8 is ideal (no vehicle mag-
netism) while numbers approaching 1 or 14 show
that the vehicle is highly magnetic. If the numbers
show that the vehicle is highly magnetic, perform
the demagnetized procedure in this Group and retest
for magnetism at compass. Test 2 (d2) checks the electronic circuits of the
compass, temperature. If the test passes d2 will be
displayed, and if the test fails F2 will be displayed.
Refer to Body Diagnostic Procedure Manual for fur-
ther testing procedures. Test 3 (d3) performs a walking segment test which,
sequentially puts different directions and numbers on
the display. If any segment fails, replace the compass
module.
SELF-DIAGNOSTIC TEST
(1) With the ignition switch in the OFF position si-
multaneously press the Comp/Temp button and the
US/Metric button. (2) Turn ignition switch ON.
(3) Continue to hold both buttons until the display
performs a walking segment test. This checks for
open or shorted segments. To repeat the test press
the Comp/Temp button. (4) Press the US/Metric button, all segments will
light for about 2 seconds. To repeat the test press the
Comp/Temp button. (5) Press the US/Metric button to return to normal
operation.
OVERHEAD CONSOLE REPLACEMENT
(1) Unscrew the mounting screw in sun glass bin
compartment (Fig. 6).
(2) Slide console forward toward windshield until
the console unhooks from roof bracket. (3) Disconnect wire harness from console.
(4) For installation reverse above procedures.
Fig. 5 Terminal Identification
Fig. 6 Overhead Console Mounting
Ä OVERHEAD CONSOLE 8C - 5

COMPASS MODULE REPLACEMENT
(1) Remove overhead console.
(2) Using a small screwdriver, release the 2 snaps
at rear of compass module. (3) After releasing the 2 snaps, slide compass mod-
ule rearward until free of mounting bar. (4) For installation reverse above procedures.
AMBIENT TEMPERATURE SENSOR
(1) Raise and support vehicle on safety stands.
(2) From behind front bumper fascia, remove screw
attaching sensor to front lower crossmember (Fig. 7). (3) For installation, reverse above procedures.
AC AND AY BODY
INDEX
page page
Ambient Temperature Sensor ............... 12
Automatic Calibration Set Procedure ........... 8
Bezel/Button Switch Removal ............... 10
Bus Accessed Diagnostics .................. 10
Console Removal ........................ 10
Electronic Board Assembly Replacement ....... 10
Electronic Vehicle Information Center (EVIC) Overhead Console ....................... 6 Engine Compartment Node Removal
.......... 12
EVIC Self Check Diagnostics ................ 8
Manual Calibration Set Procedure ............. 8
Map Reading Lamps/Power Sunroof Switch Removal .............................. 11
Overhead Reading/Courtesy Lamp Console ..... 11
Wiring Harness Removal ................... 10
ELECTRONIC VEHICLE INFORMATION CENTER
(EVIC) OVERHEAD CONSOLE
The Electronic Vehicle Information Center is a
computer controlled warning system which, monitors
various sensors used on the vehicle. The system sup-
plements the warning indicators in 8the instrument
cluster. Visual warning messages are displayed by a
digital display in the overhead console (Fig. 1).
When a warning message has been activated, a
tone will sound to attract the driver's attention. The
warning message will then be displayed on the over-
head console until the condition is corrected or a new
display function is called up. A tone will announce each new warning condition.
For complete diagnostic procedures for the EVIC
systems, refer to the Body-Chassis Diagnostic Test
Procedures Manual. The EVIC has a 24 function system that provides
the driver with visual messages when a warning con-
dition exists. These messages are displayed on the
overhead console. For complete EVIC overhead console operating in-
structions, refer to the Owners Manual provided with
the vehicle.
EVIC BUTTON FUNCTIONS
TIME button will display:
² Time of day
² Day of week
² Day of month
² Month of year
The body controller is the source of this informa-
tion. The EVIC function buttons are used to reset
and display this data.
² To set HOURS, press TIME button and within four
seconds press the SET button. An arrow will appear
on the display and point to the hours. Press and hold
the SET button to advance the hours or INFO button
to set back the hours.
² To set MINUTES, press TIME button. The arrow
will point to the minutes. Press and hold the SET
button to advance the minutes or INFO button to set
back the minutes.
Fig. 7 Ambient Temperature Sensor
Fig. 1 EVIC Overhead Console
8C - 6 OVERHEAD CONSOLE Ä

² To set DAY of WEEK, press TIME button. An ar-
row will appear on the display and point to the Day.
Press and hold the SET button to move the day for-
ward or INFO button to move it backward.
² To set DAY of MONTH, press TIME button. The
arrow will point to Date. Press and hold the SET
button to advance the date or INFO button to move
it backwards.
² To set MONTH of YEAR, press TIME button. The
arrow will point to the Month. Press and hold the
SET button to advance the Month forward or INFO
button to move backward. TEMP button, pressing the Temp button will dis-
play:
² The temperature outside the vehicle
² Vehicle direction define by an eight point compass
If Compass has lost calibration or not receiving
good information from the engine compartment node,
an asterisk (*) will flash on the display and the word
calibrate will appear. Refer to Compass Calibration. FUEL BUTTON, WILL DISPLAY:
² Pressing FUEL button the first time will show, the
estimated number of miles that can be driven with
the remaining fuel. The destination to empty indica-
tion will vary every few seconds as the amount of
fuel and fuel efficiency is calculated. This function
can not be reset.
² Pressing the FUEL button second time; will dis-
play the fuel consumed.
²
Pressing the FUEL button third time; will display
the average fuel economy in miles per gallon since last
reset. The display will be updated every 16 seconds.
² Pressing the FUEL button forth time, the current
fuel economy will be displayed. The current fuel
economy will be up updated every two seconds.
² To reset Fuel consumed, press SET button until
the fuel consumed message is displayed and then
within five seconds press SET button.
² To reset AVERAGE FUEL ECONOMY, press the
FUEL button until average fuel economy is displayed
and within five seconds press SET button. TRIP RESET, press FUEL button and wait four
seconds press the SET button twice. This clears all
trip information and the message Trip Reset will be
displayed. This will occur only if a reset function is
currently being displayed. The reset functions:
² Fuel consumed
² Average fuel economy message
INFO button, will active a MONITORED SYS-
TEMS OK message on display if all monitored sys-
tems are operating properly. If a problem is detected,
the appropriate message will be displayed. SET button, will clear the various functions after
they have been displayed. It is used to enter the
clock set or compass variance modes. This button is
also used to reset certain trip computer functions and
the maintenance reminder message.
The EVIC display may be turned off by pressing the
TIME and SET buttons at the same time. Pressing the
buttons a second time will restore the display.
EVIC INFORMATION SOURCES
The EVIC monitors information provided by the
body controller, engine compartment node and pow-
ertrain control module. Refer to Body Diagnostic Test
Procedure Manual for test procedures. The Body Controller is a micro-controller unit
which, informs the EVIC overhead console via the
CCD bus of:
² Time of day
² Day of week
² Day of month
² Month of year
² Fuel range
² Fuel consumed
² Fuel efficiency
² Warning messages as noted in Fig. 2
The Engine Compartment Node is a microcomputer
controlled unit which, informs the EVIC overhead
console via the CCD bus of:
² Outside temperature
² Compass direction
THE FOLLOWING ARE WARNING MESSAGES:
² Low brake fluid
² Low coolant level
² Low engine oil level
The powertrain control module is a microcomputer
controlled unit which, informs the EVIC overhead con-
sole via the CCD bus of the following warning messages:
² Engine temperature high
² Voltage improper
Fig. 2 EVIC Messages and Sensors
Ä OVERHEAD CONSOLE 8C - 7