Isuzu N-Series. Service manual — part 1164
8-368 CAB AND CHASSIS ELECTRICAL
Diagnostic Mode
Door Lock Operational Test
1. Check for continuity between the 1-B-219 connec-
tor and the 2-B-219 connector (harness side).
2. Check the remaining connectors to see that they
have battery voltage.
3. If the above conditions are normal but the lock
does not operate, check the door lock switch (driv-
er’s door).
Refer to the item below.
N8A5454E
5 6
1 2
9
8
10
4
3
7
Connector
1(B/R)
2(G/R)
Position
Unlock
Lock
B-219
Harness side
+
+
-
-
N8A5455E
CAB AND CHASSIS ELECTRICAL 8-369
Door Lock Switch Inspection
Check for continuity between the connectors. If there is
no continuity, the switch must be replaced.
Control Unit Removal
1. Remove the meter cluster. Refer to the item “Meter
assembly” in this Manual.
2. Release the pawl to remove the brackets holding
the tail lamp and stop lamp warning light relays.
3. Remove the connectors.
4. Remove the distributor from its bracket.
5. Loosen the fixing screws.
6. Remove the control unit from the bracket.
Control Unit Installation
Follow the removal steps in reverse order to install the
control unit.
1
4
2
5
3
6
Connector
number
Position
5
6
4
Lock
Unlock
D-4
Door lock switch side
N8A5456E
Connector
Control unit for
keyless entry system
Distributor
N8A5457E
Bracket
N8A5458E
8-370 CAB AND CHASSIS ELECTRICAL
Circuit Diagram
OFF
D
ACC
ST
ON
OFF
DOOR
ON
BATTERY
6
35
74
2
1
FTX
2L
0.5R
0.5Y
0.5GR
0.3B
0.3B
0.5B
0.5G/Y
0.5G/R
0.5BR/R
0.5BR/Y
0.5BR/R
0.5BR/Y
0.5BR/R
0.5BR/Y
0.85BR/R
0.85BR/Y
0.85BR/R
0.85BR/Y
0.85BR/R
0.85BR/Y
0.3R/G
0.3G/B
0.5B
0.85B
0.5R/Y
0.5B
0.5GR/B
0.5LG/R
RELAY
:
T
AIL
0.5GR/R
0.5GR/R
0.85R
0.5GR/R
14
32
RADIO
CIGAR LIGHTER
ROOM LAMP
RELAY:
DOOR LOCK
ACTUA
TOR
(AS)
ACTUATOR ASSY
(DR)
ACTUA
TOR FOR RH
REAR DOOR LOCK
(DUAL CAB TYPE)
ACTUA
TOR FOR LH
REAR DOOR LOCK
(DUAL CAB TYPE)
KEY SW
ANT
SW:
ROOM LAMP
SW:DOOR (DR SIDE)
SW:DOOR (AS SIDE)
3R/Y
0.85R
0.5R
F-15
AUDIO(IG),
CIGAR LIGHTER
15A
KEY SW
50A
FL-2
MAIN
100A
FL-1
AUDIO(B),
DOOR LOCK
15A
F-4
N8A5459E
CAB AND CHASSIS ELECTRICAL 8-371
ABS (Anti-lock Brake System, Without ASR)
Parts Location
H-16
H-17
H-14
H-15
J-74 F/RH SENSOR
H-5
~
H-8
B-66 STOPLIGHT SW
B-89 CLUTCH SW
B-79
DATA LINK
CONNECTOR
B-69 EXH. BRAKE SW
(BRAKE SW)
B-1 EAR
TH ;
FRAME (FR)
B-67 IGNITION SW "A"
B-7 EAR
TH ;
HEADLIGHT B/T
B-233,B-234 ECM
FUSE BOX ASM
F-2,F-5,F-16
STARTER SW
J-148 R/RH
P-5
H-13
J-31 EXH. BRAKE
MAGNETIC VALVE
SENSOR (24V)
J-149 R/LH
SENSOR (24V)
R-6
STOPLIGHT (RH)
R-1
STOPLIGHT (LH)
SENSOR (12V)
J-177
ABS EHCU
B-51 ABS
J-75 F/LH SENSOR
J-9 EAR
TH ;
FRAME
(12V)
(24V)
J-78 R/RH,R/LH
P-1
~
P-4
BATTERY
W
ARNING LIGHT (METER)
B-52 EXH. BRAKE
IND. LAMP (METER)
B-75 ACCEL SW
RELAY BOX ASM (NO.1)
X-5 ABS INDICATOR RELAY
X-8 EXHAUST BRAKE RELAY (24V)
X-25 EXHAUST BRAKE CONTOROL RELAY
X-28 EXHAUST BRAKE CUT RELAY
J-23 DIODE
FL-1,FL-2,FL-9 FUSIBLE LINK
N8A5607E
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