Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 271
relay to starter solenoid for loose or corroded connec-
tions. Particularly at starter terminals.
• Repeat test. If engine still fails to crank properly,
trouble is within starter or starter mounted solenoid,
and it must be removed for repairs. Refer to Group
8B, Battery/Starter/Generator Service, Starter re-
placement.
STARTER RELAY TEST
WARNING: CHECK TO ENSURE THAT THE TRANS-
MISSION IS IN PARK OR NEUTRAL WITH THE
PARKING BRAKE APPLIED
(1) Verify battery condition. Battery must be in
good condition with a full charge before performing
any starter tests. Refer to Battery Tests.
(2) Perform the preceding starter solenoid tests
BEFORE performing starter relay tests. Refer to
Starter Solenoid Test.
(3) Locate and remove the starter relay. For
starter relay locations, refer to Starter Solenoid Test
(Fig. 13 or 14).
(4) After the starter relay has been located and re-
moved, refer to Starter Relay Tests (Fig. 15).
NEUTRAL STARTING AND BACK-UP SWITCH
AUTOMATIC TRANSMISSION ONLY
For electrical diagnostics, when checking starter
circuits, refer to Starter Relay Tests (Fig. 15).
For replacement of switch, refer to Group 21, Tran-
saxle, Neutral Starting and Switch Replacement.
STARTER INTERLOCK SWITCH—CLUTCH
PEDAL MOUNTED
MANUAL TRANSMISSION ONLY
For electrical diagnostics, refer to the Starter Relay
Tests.
For replacement and/or adjustment of the switch,
refer to Group 6, Manual Transaxle Clutch, Manual
Transaxle Starter Interlock Switch.
IGNITION SWITCH TEST
After testing the starter solenoid and relay, test ig-
nition switch and wiring. Refer to Group 8D, Ignition
Systems, or the Front Wheel Drive Car Wiring Dia-
grams Service Manual. Check all wiring for opens or
shorts, and all connectors for being loose or corroded.
BENCH TESTING STARTER SOLENOID
(1) Disconnect field coil wire from field coil termi-
nal (Fig. 16 or 17).
(2) Check for continuity between solenoid terminal
and field coil terminal with a continuity tester. Con-
tinuity should be detected (Fig. 18 or 19).
(3) Check for continuity between solenoid terminal
and solenoid housing (Fig. 20 or 21). Continuity
should be detected. If continuity is detected, solenoid
is good.
(4) If continuity is not detected in either test, sole-
noid has an open circuit and is defective. If equipped
with:
• BOSCH STARTER: Replace the solenoid.
• NIPPONDENSO STARTER: Replace the starter
assembly.
8A - 16
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
Ä
Fig. 15 Starter Relay Tests
Ä
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
8A - 17
Fig. 16 Field Coil Wire Terminal—Bosch
Fig. 17 Field Coil Wire Terminal—Nippondenso
Fig. 18 Continuity Test Between Solenoid Terminal
and Field Coil Terminal—Bosch
Fig. 19 Continuity Test Between Solenoid Terminal
and Field Coil Terminal—Nippondenso
Fig. 20 Continuity Test Between Solenoid Terminal
and Solenoid Case —Bosch
Fig. 21 Continuity Test Between Solenoid Terminal
and Solenoid Case —Nippondenso
8A - 18
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
Ä
GENERATOR TEST PROCEDURES ON VEHICLE
INDEX
page
page
Charging System Diagnostics (Fig. 1)
. . . . . . . . . 19
Current Output Test
. . . . . . . . . . . . . . . . . . . . . . 19
Output Wire Resistance Test
. . . . . . . . . . . . . . . . 19
CHARGING SYSTEM DIAGNOSTICS (Fig. 1)
OUTPUT WIRE RESISTANCE TEST
The generator output wire resistance test shows
the amount of voltage drop across the generator out-
put wire between the generator B+ terminal and the
positive battery post.
PREPARATION
Before starting test, make sure the vehicle has a
fully charged battery. Tests and procedures to check
for a fully charged battery is shown in the Battery
section.
(1) Turn the ignition switch OFF.
(2) Disconnect battery NEGATIVE cable.
(3) Disconnect the generator B+ output wire from
the generator output battery terminal (Fig. 2).
(4) Connect a 0-150 ampere scale (DC) ammeter in
series between B+ terminal and output wire (Fig. 2
and 3). Connect positive lead to B+ terminal, and
negative lead to output wire.
(5) Using o-18 volt scale voltmeter, connect the
positive lead to the disconnected (B+) output wire
(Fig. 2). Connect the negative lead to positive battery
post.
(6) Remove fresh air hose between Powertrain
Control Module and air cleaner if necessary.
(7) Connect jumper wire between a good ground
and K20 circuit terminal at the back of the genera-
tor.
CAUTION: Do not connect the A142 circuit terminal
(Fig. 2) to ground the Fusible link will burn.
(8) Connect an engine tachometer and connect bat-
tery negative cable.
(10) Connect a volt/amp tester equipped with a
variable carbon pile rheostat between battery termi-
nals (Fig. 4).
Caution: Be sure the carbon pile is in OFF position
before connecting leads.
TEST
(1) Start engine. Immediately after starting, re-
duce engine speed to idle.
(2) Adjust engine speed and carbon pile to main-
tain 20 amperes flowing in the circuit. Observe volt-
meter reading. Voltmeter reading should not exceed
0.5 volts.
RESULTS
If a higher voltage drop is shown, inspect, clean
and tighten all connections between generator B+
terminal and battery positive post. A voltage drop
test may be performed at each connection to locate a
connection with excessive resistance. If resistance
tests are satisfactory, reduce engine speed, turn off
carbon pile, and turn off ignition switch.
(1) Disconnect battery negative cable.
(2) Remove test ammeter, voltmeter, carbon pile,
and tachometer.
(3) Remove jumper wire.
(4) Connect generator output wire to generator B+
terminal.
(5) Connect battery negative cable.
(6) Connect fresh air hose between Powertrain
Control Module and air cleaner if removed.
CURRENT OUTPUT TEST
The current output test decides whether the gener-
ator can deliver its rated current output. For gener-
ator
identification
and
output
amperage
specifications, refer to Generator Specifications.
For generator maximum voltage at individual tem-
peratures, refer to Generator Output Voltage Specifi-
cations.
PREPARATION
Before starting any tests, make sure the vehicle
has a fully charged battery. Tests and procedures to
check for a fully charged battery is shown in Battery
section.
(1) Disconnect battery negative cable.
(2) Disconnect output wire at the B+ terminal
(Figs. 2 and 5).
(3) Connect a 0-150 ampere scale (DC) ammeter in
series between the B+ terminal and output wire.
Connect Positive lead to B+ terminal and negative
lead to output wire.
(4) Using 0-18 voltmeter, connect positive lead to
B+ terminal (Figs. 2 and 5). Connect negative lead
to a good ground.
Ä
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
8A - 19
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст