air condition ISUZU TROOPER 1995 Workshop Manual

CHASSIS ELECTRICAL 8 -149
8. DOOR LOCK DOES NOT OPERATE WHEN
OPERATED FROM THE DOOR LOCK KEY SW-LH
• CHECK THE DOOR LOCKING CONDITION OPERATED
BY DOOR LOCK SW-LH
l
YES I NO l
1
• DISCONNECT THE DOOR LOCK KEY SW-LH CONNECTOR REFER TO ITEM 1 IN THIS DIAGNOSIS l
• IS BATTERY VOLTAGE APPLIED BETWEEN 1 I D-8 lOR
2 [Q]JAND GROUND?
I
YES I NO I
I
• IS CONTINUITY IN THE DOOR LOCK KEY SW-LH NORMAL? REPAIR A POOR CONNECTION OF CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1~AND
2ID-30I OR 2[@AND 3ID-30I
I
YES I NO l
I
REPAIR A POOR CONNECTION OF CONNECTORS OR AN OPEN REPAIR OR REPLACE THE DOOR LOCK KEY
CIRCUIT BETWEEN 3 [];[]AND IB-18 I SW-LH

8 -150 CHASSIS ELECTRICAL
9. DOOR LOCK DOES NOT OPERATE WHEN OPERATED
FROM THE FRONT DOOR LOCK KEY SW-RH
• CHECK THE DOOR LOCKING CONDITION OPERATED BY DOOR LOCK SW-LH
YES I
• DISCONNECT THE DOOR LOCK KEY SW-RH CONNECTOR
• ISBATTERYVOLTAGEAPPLIEDBETWEEN 1ID-171 OR 21 D-171 AND GROUND?
YES I
• IS CONTINUITY IN THE DOOR LOCK KEY SW-RH NORMAL?
YES I
REPAIR A POOR CONNECTION OF CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 31 D-171 AND(]]]
I
NO I
I
REFER TO ITEM 1 IN THIS DIAGNOSIS l
I
NO I
I
REPAIR A POOR CONNECTION OF CONNECTO S
OR AN OPEN CIRCUIT BETWEEN 11 D-171 ANC
2ID-30I OR 2ID-17I AND 3ID-30I
I
NO I
I
REPAIR OR REPLACE THE DOOR LOCK KEY
SW-RH
•

CHASSIS ELECTRICAL 8-215
1-6. AUTO-STOP FUNCTION OF THE WINDSHIELD WIPER
MOTOR DOES NOT
OPERATE
• DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER & WASHER SWITCH
• WITH THE SWITCH SET AT HOFFH POSITION, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMI-
NALS5~ -6~ 7
I
I I
YES I NO I
I I
• DISCONNECT THE CONNECTOR OF THE WINDSHIELD WIPER REPAIR OR REPLACE THE WINDSHIELD WIPER & MOTOR WASHER SWITCH
• CONNECT THE MOTOR CONNECTOR 2 I C-381 TO THE BATTERY (+) TERMINAL AND 3 ~ TO THE H TERMINAL, AND THEN CHANGE THE CONNECTION OF THE BATTERY(+) TERMINAL TO THE CONNECTOR 6 I C-381 WHILE THE MOTOR ROTATING AT A LOW SPEED
• WHEN CONNECTING THE CONNECTOR TERMINALS 2IC-38I AND
5
~ IN THIS CONDITION, DOES THE MOTOR STOP AT AUTO-STOP POSITION?
l
I I
YES I NO I
I I
• TURN THE STARTER SWITCH ON REPAIR OR REPLACE THE WINDSHIELD WIPER MOTOR
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE WIND-SHIELD WIPER MOTOR HARNESS SIDE CONNECTOR TERMINAL
6 ~AND GROUND?
l
I I
YES I NO I
I I
• DISCONNECT THE CONNECTOR OF THE WINDSHIELD REPAIR A POOR CONNECTION OF THE CONNECTORS INTERMITTENT RELAY OR AN OPEN CIRCUIT BETWEEN THE FUSE C-5 (15A)
• IS THERE CONTINUITY BETWEEN THE RELAY HARNESS SIDE AND 6 IC-381 CONNECTOR 6 I X-131 AND THE WINDSHIELD WIPER MOTOR
HARNESS SIDE CONNECTOR 5 ~ 7
l
I I
YES I NO I
I I
REPLACE THE WINDSHIELD INTERMITTENT RELAY I REPAIR A POOR CONNECTION OF THE CONNECTORS I OR AN OPEN CIRCUIT BETWEEN 6 IX-131 AND 5 IC-381

CHASSIS ELECTRICAL 8-219
2-2. AUTO-STOP FUNCTION OF THE REAR WIPER MOTOR DOES
NOT OPERATE
• DISCONNECT THE CONNECTOR OF THE REAR WIPER MOTOR
• WITH THE MOTOR SIDE CONNECTOR 2 ~ CONNECTED TO THE BATTERY(+) TERMINAL AND THE TERMINAL 4 ~TO THE (-)TERMINAL, ROTATE THE MOTOR
• WHILE ROTATING THE MOTOR, CHANGE THE CONNECTION OF
THE BATTERY(+) TERMINAL TO THE CONNECTOR 3~ , AND THEN CONNECT THE CONNECTORS 1 I G-6 I AND 2 G-6
• DOES THE REAR WIPER STOP AT THE AUTO-STOP POSITION
IN THIS CONDITION?
I
I I
YES J NO I
l I
• TURN THE START SWITCH ON
REPAIR OR REPLACE THE REAR WIPER MOTOR I
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE REAR
WIPER MOTOR HARNESS SIDE CONNECTOR 31 G-61 AND THE
GROUND?
I
I
I
YES I NO I
I I
• DISCONNECT THE CONNECTOR OF THE REAR INTERMITTENT REPAIR A POOR CONNECTION OF THE CONNECTORS RELAY OR AN OPEN CIRCUIT BETWEEN THE FUSE C-6 (10Al
• IS THERE CONTINUITY BETWEEN THE RELAY HARNESS SIDE AND 31 G-61 CONNECTOR 51B-211 AND THE WIPER MOTOR HARNESS SIDE
CONNECTOR 1 G-6 7
I
I
I
YES
I NO I
I I
REPLACE THE REAR INTERMITTENT RELAY I REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 5 IB-211 AND
11 G-61

'"T1 cO' co w (
RELAY
& FUSE
BOX
(FL-11
RELAY:
NC
COMPRESSOR
BLOWER
MOTOR
RELAY:
NCTHERMOSTAT
,,-;~
H-42'
NC:
AIR
CONDITIONING
(
PRESSURE
SW
RECEIVER
DRIER
B-19
FUSE
BOX
(C-19,
C-201
B-36 RELAY;
HEATER
& NC
NCSW FAN
SW
AND
HEATER
BEZEL
ILLUMINATION
LIGHT
(
MAGNETIC
CLUTCH
INC
COMPRESSOR)
;g ::0 ~ r-0 0 ~ 0 2
n :::J: )> en en Cii m r­m ~ ::u n )> r-eo I w ~ ...a

8 -342 CHASSIS ELECTRICAL
CIRCUIT DIAGRAM
~ IOOV
M:LAV; 8TARTERI1) ITO PAOEI· .. I
E!]~ ENG. ft'AME
. :l
. 5
IOOV-11< II
2L
I LOWER MOTOR
'
fiiELAY; HEATEfii6AIC
C·1t 21A BLOWER
A/C: AIR CONDITIONING
O.IIR O.IIR
IOOV~ 11~----------------------------------------------------------__J
Fig. 8-396
22
H·11
..

8-340 CHASSIS ELECTRICAL
HEATER AND AIR CONDITIONING
GENERAL DESCRIPTION
The circuit consists of the pressure switch, NC switch, electric thermostat, blower motor, fan switch, magnet
clutch of the NC compressor, blower resistor and relay.
The start and stop of the NC is controlled by turning the NC switch on and off. The electric thermostat and the
ECM can stop the operation of the NC temporarily by disconnecting the magnet clutch under the
predetermined conditions
to adjust the room temperature, preventing the abnormal rise of the engine coolant
and reduce the engine load while the NC is in operation.
Refer
to Section 18 "AIR CONDITIONING" for detail.
OPERATING CONDITIONS OF A/C COMPRESSOR (MAGNETIC CLUTCH)
BATIERY(+)
--
~
A/C SW "ON"
~
HEATER & A/C RELAY "ON"
(The contact point is closed except
when starter SW is at ST or OFF position)
(S =:>
¢:!]
PRESSURE D
SW"ON"
¢:::l
~ FAN SW"ON"
u A/C THERMOSTAT
RELAY
"ON"
A/C COMPRESSOR
RELAY"ON"
ECM IA2l "ON"
MAGNETIC
CLUTCH lAIC COMPRESSOR)
"ON"
NOTE:
Arrow marks" =:> " indicate the direction of current
Fig. 8-394
~
1111

Circuit inspection of the power seat switch (Fig.
8-422)
lti!.l Remove the connector IH-461 ofthe power seat
switch and check the
voltage and continuity of
the harness side connector.
I H-461
a u~u
Terminal No. Wire color Connected to Item to be
measured
1 8/L C/8-2
(30A)
Voltage
CHASSIS ELECTRICAL 8-371
Harness
side
Connecting Checking
Standard
terminal condition
1-Ground
-Apprpx. 12V·
4 8 Ground Continuity 4-Ground -Continuity
PASSENGER SIDE
(1!] INSPECTION
Fig. 8-422
Check
to see if there is any continuity between the
connector
terminals while operating the power seat
switch. (Fig. 8-423)
Repair
or replace the switch when the result of inspec­
tion is found abnormal.
[ill I T-121
I
Switch
a side Switch
side
~0. T-9
Terminal No. 1 2

2
Sw Direction
0 Forward
Slide switch 0
0
Rearward 0
0 Forward 0 Recliner switch 0 Rearward 0
Fig. 8-423
I T-131
I
Switch
side
T-12 T-13
3 4
5 6
1 2
-o
{)
{)
"' ....,
-o
"' ....,
{)
-o

98-20 CRUISE CONTROL
@ INSPECTION OF THE MODE SWITCH, CANCEL SWITCH (A/T), CLUTCH
SWITCH
(M/T) AND THE CIRCUIT
• IS THE FUSE C-3 IA/TI OR C-4 IMfTI NORMAL?
• DISCONNECT THE CONNECTOR OF THE MODE SW (CLUTCH SWITCH).
• IS THERE BATTERY VOLTAGE APPLIED
BETWEEN THE HARNESS SIDE CONNECTOR SIC-431 121 B-1611 AND THE GROUND WHEN STARTER SWITCH IS ON?
• IS THE CONTINUITY IN THE MODE SWITCH !CLUTCH SW) NORMAL?
•
DISCONNECT THE CONNECTOR OF THE CANCEL SWITCH.
• WHEN IN THE FOLLOWING CONDITIONS, IS THERE BATTERY VOLTAGE APPLIED BETWEEN THE
SWITCH HARNESS SIDE CONNECTOR 121 B-521 AND THE GROUND?
(A/T): WHEN THE MODE SWITCH IS EITHER AT "D",
"3", "2" OR "L" POSITION. (MfTI: WHEN THE CLUTCH PEDAL RELEASED.
CONTINUED ON FOLLOWING PAGE
REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 I 15A) AND 51 C-431, OR THE FUSE C-4 (10AI AND 21 B-161.
..

ACTUATOR CABLE DIAGRAM (FIG. 98-
18)
Engine control cable
CRUISE CONTROL 9B-35
Accelerator pedal
Fig. 98-18
~ INSPECTION
I C-371
E9
Circuit Tester
Resistance Current
connection (Q) (A)
Vent
valve 1-2 62-72 -
Safety valve 2-4 62-72 -
Vacuum pump 2-3 -Max. 2A
Fig. 98-19
I~~ Check the resistance and current values between
the
pump & VSV connector terminals. (Fig. 98-
19)
Repair or replace the pump & VSV when the
result of inspection is found abnormal.
IL1i'llnspection of operation (Fig. 98-20)
Apply the battery voltage between the pump & VSV
connector terminals, and check to see if the motor and
actuator operate
smoothly.
Repair or replace the pump & VSV when the result of
inspection is found abnormal.
I C-371
il
Check condition Operation
Connect connector
terminalll C-3~ I Motor operates
to battery(+} terminal and 3 C-37 to (-)terminal
In the condition abov~und Actuator cable is
connector
terminal 1 C-37 and pulled
41 C-371
In the condition abov
1e. disrnnect Cable is pulled back
connector
terminal 1 C-37 and
41 C-371
Fig. 98-20