Page 1209 of 1413
(From page 23-1021
Apply a load wirh the VA'-4O un-til the battery voltage drops to be-tween 12- 13.5 V.
ls the amperage 60 A or more?
With the engine spe6d still at2OOO rpm, full-tield the altemalor.
Toat rnd rooalr d|e dtomEtor {soopsg.. 23-104 to 23-tO7).
Turn the ignition switch off; thenturn at on again.
Disconnocl lhe 4-P connectorIrom the altornator.
Check lor voltage between the lGterminal (BLK/YEL) and bodyground.
ls there battery vokage?Rop.ii open in tho BLK/YEL wiro.
NOTE; Attach a probe to the VAT-4O full field test lead and insert the orobeinto the full tield sccess hole at the back of the alternator. Switch the field selectorto the "A (Ground)" position momentarily and check amperage reading.
CAUTION: The voltago will ris6 quickly whon the slternator is full-fiolded. Donot allow th€ voltago to oxc66d 18 V 01 it may damage the elect.ical system
REGULATOR
{Locatodthe end cover)
FULL FIELDACCESS HOLE
L IWHT/BLUI
4-P CONNECTOR
IG IBLKATELI
wire side
23-103
Page 1210 of 1413

Charging System
Alternator Replacement
NOTE: The original radio has a coded theft protection
circuit. Be sure to get the customer's code number before
- disconnecting the battery.- removing the No. 32 {7.5 A) fuse from the under-hood
fuse/relay box.- removing the radio.
After service, reconnect powet to the radio and turn it on.
When the word "CODE" is displayed, enler the cus-
tomer's 5-digit code to restore radio operation.
1 . Disconnect the ground cable from the battery nega-
tive (- ) terminal.
2. Disconnect the alternator connector from the al-
rernaror.
TERMINAL NUT
B TERMINAL
ALTERNATORCONNECTOR
Remove the terminal nut and the WHT wire from the
B terminal.
Loosen the adjusting nut. then remove the mount-
Ing nul.
MOUNTING NUT44 N.m (4.5 kgt.m, 33 lbf'ftl
5. Remove the alternator belt from the alternator pulley.
6. Remove the lower mounting bolt, then lift the alter-
nator upward.
23-104
ADJUSTING NUT
w
UPPER MOUNTII{GBRACKET BOLTSil4 N.m {4.5 kgl'm, 33 lbl'ft}
24 N.m 12.4 kgf'm,'t 7 tbf.ftl
\ (^,-(\
\-/ I
7. Remove the lower and upper mounting bracket bolts
and the mounting brackets.
BRACKETBRACKET BOLTS44 N.m (4.5 ksl.m, 33 lbt'ft1
8. Remove the adiusting nut and upper mounting bolt,
then lift out the alternator.
9. lnstall the altetnator in the reverse order of removal.
CAUTION: Adiust tho alternalor belt tension aftor
installation (seo Page 23-1O81.
NOTE: Reconnect the battery ground cable and turn
the radio on. When the word "CODE" is displayed,
enter the customer's 5-digit code.
Page 1211 of 1413
Alternator Overhaul
CAUTION: Do not r€move th€ pulley unl€Es the t.ontbearing needs r6placsm6nt.
To loosen the pulley locknut, use 10 mm and 22 mmwrenches. It necessary, use an impact wrench.
Test, page 23-107SPAC
REAR BEARING
ER RING
rl
@n
CAUTION: Do not get grease
or oil on the slip rings.
HOLDERTOR
ARUSH HOLOER
FRONT BEARING
PULLEY LOCKI{UT1'll N.m 111.3 kgt.m,82 tbf.trl
STATOR/DRIVE ENDHOUStt{G
BBUSHINSULA
)
(@P "
STATOR THROUGHBOLT
VOLTAGE REGULATOR
DIODE IRECTIFIER) ASSEMBLYTest, page 23-106
6
q
%A
re
TERMINAL INSULATORqt
PULLEY LOCKNUT111 N.m (1 1.3 kgt.m, 82 lbf.ft)
PULLEY
10 mm BOX WRENCH
REAR HOUSING
Inspection, page 23-
fu"- "o*n.r" ".,"- BRACKET
23-105
Page 1212 of 1413

RectifierTest
NOTE: The diodes are designed to allow current to pass
in one direction while blocking it in the opposite direc-
lion. Each diode must be tested for continuitv in both
directions with an ohmmeter that has diode checking
capability. Since the alternator rectifier is made up of
eight diodes (four pairs), there are a total of '16 checks,
1. Check for continuity in each ditection between the
B and P terminals, and between the E (ground) and
P terminals of each diode pair. All diodes should have
continuity in only one direction,
lf any of the eight diodes tails, replace the rectifier
assembly. (Diodes are not available separately.)
Gharging System
Alternator Brush Inspection
Remove the end cover, then lake oul the brush
holder by removing its two screws
Measure the length of the brushes with a vernier
calioer.
Aliornatol Brush Longlh:
Standard: 10.5 mm (O.41 in)
Servic. Limit: 1.5 mm (O.06 in)
lf the brushes are less than the service limit, replace
the b.ush holder assemblv.
VERI{IEB CALIPEB
23-106
Page 1213 of 1413
Rotor Slip Ring Test
1 . Check thst there is continuity between thg slip rings.
ROTOR SHAFT
Check th8t there is no continuity betw€en the slip
rings and the rotor or rotor shaft.
lf the rotor fails either continuity check, rsplace th€
alternator.
2
3
Stator Test
1. Chock that there is continuity between each pair ofl6ads.
Ch6ck that there is no continuity between each lead
and the coil core.
lf th€ coil fsils either continuity check. replace the
alt6rnator.
cotl coRE
23-107
Page 1214 of 1413

Charging System
Alternator Belt Inspection and Adjustment
Deflection Method:
Apply a force of 100 N (1o kgt, 22 lbJ) and measure the
deflection between the alternator and the crankshatt
pulley.
Detlsction:9-11 mm (0.35-O.43 inl
NOTE; On a brand-new belt {one that has be€n run
for less than five minutes), the deJlection should be
6-8 mm 1O.23-O.32 in) wh€n first measured. lf
the belt is worn or damaged, replace it.
ALTER'{ATOR ADJUSTIT{G NUT
24 N.m {2.4 kgl'm, 17 lbl'ft1
MOUt{Tlt{GNUT44 t{.m (4.5 kgt.m,33 tbf.ft)
PULLEY ALTEBNA
lf adiustment is nocessarY:
1. Loosen the alternator adjusting nut and mounting
nur.
2. Move the alternator to obtain the proper belt tension,
then retighten the adjusting nut and mounting nut
to the specified torques.
3. Recheck the deflection ot the belt.
NOTE: lt necessary, adiust the P/S pump belt (see
section 17) and A/C compressor belt lsee section
22t.
23-108
Boh Tsnsion Gaug6 Mothod:
Foltowing the gauge manuJacturer's instructions, attach
the belt tension gauge to the belt and measure the
tension.
Tension: 340-49O N (35-50 kgl, 77-110 lbfl
NOTE: On a brand-new belt (one that has been run
for less than tive minutes), tension should be
690-880 N (70-90 kgt, 154- 198 lbJ) when tirst
measured. lf the belt is worn or damaged, replace it.
lf adi$tmsnt is nscaasary:
1. Loosen the alternator adiusting nut and mounting
nut.
2. Move ths ahernator to obtain the proper bslt tension,
then retighten the adjusting nut and mounting nut
to the specified torques.
3. Recheck the tension of the belt,
NOTE: lf necessary, adjust the P/S pump belt (see
section 17) and A/C compressor belt (see section
22t.
ALTERI{ATOR ADJUSTING NUT
24 .ln 12.4 kst'm, 17lbl'ft}
oTJGG-0O1010A
Page 1215 of 1413
Fan Gontrols
Component Location Index
For the A/C system, see section 22.
UNDER-HOODFUSE/RELAY BOX
RADIAIOR FAN REI.AYTest, page 23-68
CONDCNSER FAI{ BELAYlwir6 color3: ELKnirHT, WHTIIBLUryEL, and BLU/BL( ITest, page 23-68
ENGII{EcooLA TTEMPERATURE{ECT)SwlTCHTesr, page 23-'l 12
FAN MOTORTest, page 23-112
BADIATOR FAN MOTORTest, page 23-1 12
23-109
Page 1216 of 1413
ul{o€R - DAstlGIINONSWITCH FUSC/RELAYBOX
Circuit Diagram (Without A/Cl
UI{OER - HOOD FUS€/REI.AY BOX
6r F'rrr^'l.{ ots YEt {<\o*r
\-Y -l
ECM
V
Gtr{
l,*^,
($fffiHil'r"n.''
I
t?i'r?Tdf.ol
I
ffi,"'l
IBtl(
I
I:
G10l
Fan Controls
23-110
No.4l {lmA, No.39l50Al
FIIF.-