Page 999 of 1681
Troubleshooting
Blower Motor (cont'd)
From page 21-11\View from wire side
8LU/BLK( + I
Turn the ignition switch OFF.
Remove the heater control panel(see page 21-25).
Turn the ignition switch ON lll).
Measure the voltage between theBLU/BLK wire terminal {+) andbody ground (- ).
Repair open in the BLU/Bl-K wir6between the blowea motor andthe hoster lsn switch.ls there battery voltage?
Turn the ignition swirch OFF.
Check for continuity in the BLKwire between the heater fanswitch and body ground.
Check fo. an oDen in th6 8LK wirebotwo€n th€ haat€r tan switchand body ground. ll th6 whe isOK. check tor poor ground atG201 and 401.
Rsplac€ the heat€r fan switch.
ls there continuity?
Page 1000 of 1681
From page 21-11
BLOWER MOTOR RELAY /rp SOCKETTurn the ignition switch ON {ll).
Measure the voltage between theNo. 4 terminal (-f ) and bodyground (- ).
Repair open in the BLK/YEL wirebetweon tho under-hood tuse/r€-lav box and th€ und€r-drshtuse/relav box.
ls there battery voltage?
Turn the ignition swrtch OFF.
Check for continuity between theNo. 2 terminal and body ground.
Check for an oDen in the BLK wir€belween the undor-hood fuso/re-lay box and body ground. It thewire is OK, check forpoor groundat G201 and G4O1.
Ropair open in the BLU/WHT wirebetween the undor-hood fuse/re-lav box and the blow€r motor.
21
4
Page 1001 of 1681
Troubleshooting
Mode Control Motor
Mode controlmotor does nol run.or ong or more mode are in-operatve.
Disconnect the mode control mo-tor 8P connector.
Turn the ignrtion switch ON (ll).
Measurethe voltage between theBLK/YEL wire terminal {+ ) andbody ground (- ).
Repair open in ths BLK/YEL wirebetween the und€r-dash fusehe-lay box and the mods cont.olmotoa,
Turn the ignition swirch OFF.
ls there battery voltage?
To page 21 15
21-14
Page 1004 of 1681
Recirculation Control Motor
Recirculation contiol door doosnot change b6tw66n FRESH andRECIRCULATE.
Disconnect the recirculation control motor 4P connector.
Turn the ignition switch ON (lll.
Measure the voltage between theBLK/YEL wire terminal (+l andbodv ground 1- ).
Repair opon in the 8LK/YEL wirebotwo€n th6 undeFdaah fus6/r6-lay box and ths .acirculation con-lrol motor.
ls there battery voltage?
lurn the ignition switch OFF.
To p6ge 21-18
{cont'd)
21-17
Page 1015 of 1681

Mode Control Motor
Test
Connect battery power to the No. 4 terminal of themode control motor and connect ground to the No.
I terminal.
Using a jumper wire, connect the No. 8 termjnal in-dividually to the No. 1, 2, 3, 6 and 7 terminals, inthat order. Each time the short circuit is made. themode control motor should run smoothly and stop.
NOTE: lf the mode control motor does not run whenshorting the first terminal, short that te.minal againafter shorting the other terminals.
The mode control motor is OK if it runs when jumping
the tirst terminal again.
lf the mode control motor does nol run in steD 2, re-move it, and check the mode control linkage anddoors for smooth movement. lf the mode controllinkage and doors move smoothly, replace the mode
control motor.
Replacement
MODE CONTROLMOTOR
Disconnect the mode control motor 8P connector,
and remove it lrom the heater unit,
Remove the lwo sc.ews, the mode control motor,
and the flange collar.
MODE CONTROLMOTOR 8PCONNECTOR
Install in the reverse order of removal. After instal-lation, make sure the mode control motor runssmoothly.
21-28
Page 1016 of 1681

lli
''
ltRecirculation Control Motor
Test
1.Connect battery power to the No. 1 terminal of the
recirculation control motor, and connect ground to
the No. 2 and No. 4 terminals; the recirculation con-
trol motor should run smoothly.
Disconnect the No. 2 or No. 4 terminal from ground;
the recirculation control motor should stop at FRESH
or RECIRCULATE.
CAUTION: Never connect the battery in the oppo-
site dilection.
NOTE: Don't cycle the recirculation control motor
for a long time.
lf the recirculation control motor does not run in step
1, remove it, and check the recirculation control link-
age and door lor smooth movement. If the recircu-
lation control linkage and door move smoothly,
reDlace the recirculation control motor.
3.
1.Disconnect the 4P connector from the recirculation
control motor, and remove the wire harness clip from
it.
2. Remove the two screws, the recirculation
motor and the flange collaf.
scREwsRECIRCULATIONCONTROL MOTOB
lnstall in the revefse order of removal. After instal-
lation, make sure the recirculation control motor runs
smoothly.
4P CONNECTOR
Replacement
21-29
Page 1026 of 1681

Troubleshooting
Radiator Fan
RADIATOR FAN RELAY 4P SOCKET
El2F-lt--T-- |
ujj I
I
",-*rrro [--l .u^rrrr
E lw'RE
l2-
trI
\
\
8LK BLK/RED
View from wire side\
Radiator lan does not run at all.
Chock the No. 57 (20 A) fuse in
the undeFhood fuse/relay box.
Remove the radiator tan relayfrom the under-hood fuse/rolaybox, and test it (see page 22-19).
Measuro the voltag€ betwogn theNo.2 terminal (+) and bodyground (-).
ls there battery voltage?
Connect the No. 1 and No. 2 ter-minals with a jumper wire.
Does the radiator fan run?
Check for continuity in the BLK/RED wire between the No. 1 ter-minal and the radiator fan.
Repair open in tho BLK/RED wir6b6twaon the undor-hood fuso/r6l6v box and the radirtorf6n.ls there continuity?
Check Ior continuity in the BLKwire between the radiator lanand body ground.
Chock for.n opon in tho BLKwiro botween tho .adiator fanand body ground, It tho wire i3OK, check for poor ground rtG201 and G401.
ls there continuity?
Roolace the radiator tan motor.
10 page 22-9
22-8
Page 1027 of 1681
From page 22 8
RADIATORFAN RELAY
l-'--l
| 2 |
[T;]
I BrK/YEt
o)
I
RELAY 4P SOCKET
Disconnect the,umper wire andturn the ignition switch ON (II).
Measure the voltage between theNo. 4 terminal (+i and bodyground ( ).
Ropair op€n in the GRN wire be-tween the undor-hood Iuse/.elay box and the A/C diode.
ls there battery voltage?
Repair open in the BLK/YEL wirebotwean the under-hood tuse/relay box snd the under-daahfuso/relay box,
22-9