ISUZU TROOPER 1995 Workshop Manual

CHASSIS ELECTRICAL 8 -141
MEMO

8-142 CHASSIS ELECTRICAL
POWER DOOR LOCK
GENERAL DESCRIPTION
The circuit consists of the door lock (& power window) switch, door lock actuator for the front and rea door,
tailgate
lock actuator and the door lock key switch.
The
front door lock switch-LH is always provided with battery voltage. The key or the inside lock bu on on
the both driver's and the
front passenger's door can activate the lock mechanism of all the doors (in< luding
the tailgate).
When the driver's
door lock switch or the front passenger's door lock switch is turned on, current fie ws for
about one second to the door lock actuator of each door connected in parallel with the front door ock (&
power window) switch-LH to activate the actuator to lock and unlock the doors.
OPERATION OF DOOR LOCK BY DRIVER SIDE LOCK KEY SWITCH
LOCK
UNLOCK
BATTERY(+) POWER WINDOW RELAY
.....-1::::::;---'li) ~
fi ::> ~ = } TO ACTUATOR IC IE~CC (ACTUATOR OPERATES
I l lj~:.-.>+T++==-TO LOCK SIDE)
W=~~~~'l g
Jlf!
FRONT DOOR LOCK (& POWER WINDOW l SW-LH
sb2-f---+---w
U ~rh;±,i DOOR LOCK ~LfJg KEY SW-LH
u =
BATTERY(+) POWER WINDOW RELAY
,..,~T =
I IEl. )
CS ~:t-o·++ 1+==-TO UNLOCK SIDE)
IL...t=:t=~~w.~ g
~q;J
FRONT DOOR LOCK (& POWER WINDOW) SW-LH
[b =
U ~8 DOOR LOCK
~l.f} KEY SW-LH
NOTE: Arrow marks"=" indicate the direction of current.
Fig. 8-181
IIIII

"T1 !0 (X) I ... (X) N
(
RR
DOOR
LOCK
ACTUATOR
(RHI
DOOR
LOCK
KEY
SW
"-
FRT
DOOR
LOCK
& POWER
WINDOW SW
(RHI
RELAY
& FUSE
BOX (FL-11~
BATTERY
' ,,
( TAILGATE
LOCK
ACTUATOR
(LHI
RR
DOOR
LOCK
ACTUATOR
(LHI
h.=
I //If/:
I
FRT
DOOR
LOCK
& POWER
WINDOW
SW
(LHI
FRT
DOOR
LOCK
ACTUATOR
(LHI
FUSE
BOX
(C-181
(
~ ~ r-0 n ~ 0
2
(") J: )> en
en (i) m r­m ~ :a g r­eo I ...a t

8 -144 CHASSIS ELECTRICAL
CIRCUIT DIAGRAM
FL-1 86/R 80AMAIN SW 5W + o---+=-=-4 P-2 ~
GJ
GJ
/
1 H-14 SW
~~P-1ol~ BODY ENG. FRAME 1.25 LG/W
5W
1 C-18 J 20A DOOR LOCK
4 RELAY; POWER WINDOW 141 ITO PAGE 8-1!58)
...
r---D~D~~~1o~------------~~5~7-----,
§*f-----+------+--.51
RE' AY· I I'V'K RELAY; UP 1__;;=.l...v----J--·m~;:;:::::I--·~RELAY; DOWN I ~ ~ ~ 1.25LG IC H-23f----.----------------t--------~
R~LOCK 8 5 ~--r-_)~~i_~t~~~~l~~o~t~--~----~ID-si~~~1-~25~LG~~~~--H~~--~----+---~---4----~--~--~
~!
-
RELAY; UP RELAY; DOWN
D-30JI D-30/1 D-30j ~ 1 2
0 14 2 H-22 H-23
14 2
H-18 H-19
"' BODY-RHij~
3 1
0.5 L!Y
H-19
"' tQ~------------~
"' H-23
"' "' N "' BODY-LH II B-181---------------_J
22 21 H-32 0 -32
3 5 e 3 3 e H-19 H-19
H-34 H-34 H-28 H-28
" .... IQ ~ -' s "' ~ ::!
~ ~ II! s s g s 2
~ IQ
IQ ~ ~ "' IQ H-38 ~ N -' -' -' -'
s ~
"' ;, N ::! "'
Fo.~ Fo-~ Fo-i'f1 Fo-~ ~~ Fo-~ Fo-~ ~2~ Faf1 f. r.1
M M
FAT DOOR LOCK FAT DOOR LOCK ACTUATOA-LH ACTUA TOR-AH
Fig. 8-183
M
ARDOORLOCK ACTUATOR-RH
M
RADOOALOCK ACTUATOA-LH TAILGATE
ACTUATOR· H
•

CONNECTOR LIST
CHASSIS ELECTRICAL 8 -145
~~
~m
Fig. 8-184

8 -146 CHASSIS ELECTRICAL
DIAGNOSIS
QUICK CHART FOR CHECK POINTS ~
~
Fuse FRT Door FRT Door
Door Door Door
lock actuator
lock lock
lock key lock key
Cable IC-18 I& power I& power 20AI window)
window) switch switch FRT-LH FRT-RH RR-LH RR-RH Tailgate
arness
T SW-LH SW-RH FRT-LH FRT-RH
1. All the doors do not
lock and unlock by
door lock SW-LH 0(1) 0131
P121
2. All the doors do not
get locked (or
0(1) 0121 Pl31 unlocked) by FRT door lock SW-RH
3. FRT door-LH does not 0(1) P121 get locked {or unlocked)
4. FRT door-RH does not 0111 P121 get
locked (or unlocked)
5. RR door-LH does not 0(1) P121 get locked (or unlocked)
6. RR door-RH does not 0111 P121 get
locked (or unlocked)
7. Tailgate does
not get 0111 P121 locked (or unlocked)
8. Door lock does not
operate when operated 0111 0131 p(2) from the door lock key SW-LH
9. Door lock does not ~ operate when operated Om 0131 P121 from the door lock key SW-RH
Note: Figure in parenthesis "( )" indicates the order of inspection.
~
•

•
•
•
•
•
CHASSIS ELECTRICAL 8-147
1. ALL THE DOORS DO NOT LOCK AND UNLOCK BY DOOR LOCK
SW-LH
IS FUSE C-18 (20Al NORMAL? I
I
YES I NO I
I
IS I
B-181 GROUNDED SECURELY? I REPLACE THE FUSE I
I
YES
j NO I
l
DISCONNECT THE DOOR LOCK SW-LH CONNECTOR
GROUND IB-18ISECURELY
IS
BATTERY VOLTAGE APPLIED BETWEEN 10~
AND GROUND?
l
YES I NO I
l
IS THERE ANY CONTINUITY BETWEEN 11 D-5 I I REPAIR A POOR CONNECTION OF CONNECTORS
AND I B-181 OR AN OPEN CIRCUIT BETWEEN FUSE C-18 (20A)
AND 10 I D-51
I
YES I NO I
I
REPAIR
OR REPLACE THE DOOR LOCK SW-LH J REPAIR A POOR CONNECTION OF CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 11 D-5 I AND
I B-181

8-148 CHASSIS ELECTRICAL
2. ALL THE DOORS DO NOT GET LOCKED (OR UNLOCKED) B~
FRT DOOR LOCK SW-RH
• CHECK THE DOOR LOCKING CONDITION BY
DOOR LOCK SW-LH
I
I
YES I
I
• IS CONTINUITY IN THE FAT DOOR LOCK SW-RH
NORMAL?
I
I
YES I
I
• IS(]}] GROUNDED SECURELY?
I
I
YES I
1
REPAIR A POOR CONNECTION OF CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 I D-301 AND 31 D-141
OR 1 I D-301 AND 41 D-141
I
I
I NO I
I
I REFER TO ITEM NO. 1 IN THIS DIAGNOSIS I
I
I NO I
I
I REPAIR OR REPLACE THE DOOR LOCK SW-L -1 I
I
I NO I
I
I GROUND[]]]SECURELY I
3. FRT DOOR-LH DOES NOT GET LOCKED (OR UNLOCKED)
4. FRT DOOR-RH DOES NOT GET LOCKED (OR UNLOCKED
5. RR DOOR-LH DOES NOT GET LOCKED (OR UNLOCKED)
6. RR DOOR-RH DOES NOT GET LOCKED (OR UNLOCKED)
7. TAILGATE DOES NOT GET LOCKED (OR UNLOCKED)
I REPLACE THE DOOR LOCK ACTUATOR I
..

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
•