MITSUBISHI TRITON 1997 Workshop Manual

P
ro bab le c au se M
easu re a t S R S c h eck h arn ess c o n-
n ecto r ( 5 ).

Dis co nnect S D U c o nnecto r
C -2 7.

Connect S R S c h eck h arn ess
c o nnecto r ( 3 ).

Contin uit y b etw een te rm in als
( 1 9) ± ( 2 0)
O K: C ontin uit y N
G C
heck tr o uble s ym pto m . N
G C
heck th e h arn ess b etw een th e S D U a nd e arth , a nd
r e pair if n ece ssa ry . O
K M
easu re a t S R S c h eck h arn ess c o nnecto r ( 5 ).

Ig nit io n s w it c h : O N

Volt a ge b etw een th e te rm in al ( 1 1 ) a nd b ody e arth .
O K: 9 V o r m ore N
G R
epla ce th e S D U. O
K C
heck tr o uble s ym pto m . N
G C
heck th e h arn ess w ir e b etw een th e S D U a nd ig nit io n s w it c h IG
1
( B ), a nd r e pair if n ece ssa ry .

P
ro bab le c au se M
easu re a t S R S c h eck h arn ess c o n-
n ecto rs ( 5 ).

Dis co nnect S D U c o nnecto r
C -2 7.

Connect S R S c h eck h arn ess
c o nnecto r ( 3 ).

Contin uit y b etw een te rm in als
( 1 9) ± ( 2 0)
O K: C ontin uit y N
G C
heck tr o uble s ym pto m . N
G C
heck th e h arn ess w ir e b etw een th e S D U a nd e arth ,
a nd r e pair if n ece ssa ry . O
K M
easu re a t S R S c h eck h arn ess c o nnecto r ( 5 ).

Ig nit io n s w it c h O N

Connect te rm in al ( 1 3) to b ody e arth .
O K: L am p illu m in ate s. N
G B
lo w n S R S w arn in g la m p
b ulb c h eck. N
G
Rep air C
heck t h e f o llo w in g
c o nnecto rs :
C -2 7, C -8 6, C -8 7, C -8 8 N
G
Rep air O
K R
epla ce th e S D U. O
K C
heck tr o uble s ym pto m . C
heck th e h arn ess w ir e
b etw een th e S D U a nd
i g nit io n s w it c h ( IG
1)
, a nd
r e pair if n ece ssa ry . N
G
Rep air O
K R
epla ce th e c o m bin atio n
m ete r.

SRS ± Troubleshooting52B-14
Code No.43 SRS warning lamp drive circuit system
(Lamp does not switch off.)Probable cause
This diagnosis code is output when a short to earth occurs in the harness between
the lamp and the SDU while SDU is monitoring the SRS warning lamp and the lamp
is ON.
Malfunction of wiring harnesses or connectors

Malfunction of SDU

Malfunction of combination meter
SRS warning lamp inspection

Ignition switch: ON

Does lamp switch off when SDU connector C-27 is
disconnected?NoCheck the following
connectos:
C-06, C-27NG
Repair
Ye s
Replace the SDU.
OK
Check trouble symptoms.
NG
Check the harness wire
between the SDU and
combination meter, and
repair if necessary.
Code No.44 SRS warning lamp drive circuit systemProbable cause
This diagnosis code is output when a short occurs in the lamp drive circuit or a
malfunction of the output transistor inside the SDU is detected while the SDU is
monitoring the SRS warning lamp drive circuit.
Malfunction of wiring harnesses or connectors

Malfunction of SDU
Check the SRS warning lamp drive circuit system.
(Refer to P.52B-13.)OKReplace the SDU.
Code No.45 SDU non-volatile memory (EEPROM) and A/D
converter systemProbable cause
This diagnosis code is output if there is a malfunction in the SDU non-volatile memory
(EEPROM) and A/D converter.
Malfunction of SDU
Replace the SDU.
INSPECTION CHART FOR TROUBLE SYMPTOMS52400340126
Get an understanding of the trouble symptoms and check according to the inspection procedure chart.
Trouble symptomInspection procedure No.Reference page
Communication with
MUT-II is not possible.Communication with all systems is not
possible.152B-15
Communication is not possible with
SRS only.252B-15
When the ignition key is turned to ªONº (engine stopped), the
SRS warning lamp does not illuminate.Refer to diagnosis code No.43.52B-13
After the ignition switch is turned to ON, the SRS warning lamp
is still on after approximately 7 seconds have passed.Refer to diagnosis code No.43.52B-14

P
ro bab le c au se R
efe r to G RO UP 1 3A ± T ro uble sh ootin g.
I n sp ectio n P ro ced ure 2
C om munic atio n w it h M UT-II is n ot p ossib le .
( C om munic atio n is n ot p ossib le w it h S R S o nly .) P
ro bab le c au se M
easu re a t S R S c h eck h arn ess
c o nnecto r ( 5 ).

Dis co nnect S D U c o nnecto r
C -2 7.

Connect S R S c h eck h ar-
n ess c o nnecto r ( 3 ).

Contin uit y b etw een te rm i-
n als ( 1 9) ± ( 2 0)
O K: Contin uit y N
G O
K C
heck tr o uble s ym pto m s. N
G C
heck th e h arn ess w ir e b etw een th e S D U a nd e arth , a nd r e pair
i f n ece ssa ry . O
K C
heck tr o uble s ym pto m s. N
G C
heck th e h arn ess w ir e b etw een th e S D U a nd ig nit io n s w it c h IG
1,
a nd r e pair if n ece ssa ry . O
K C
heck th e h arn ess w ir e b etw een th e S D U a nd d ia gnosis c o nnecto r. N
G
Rep air R
epla ce th e S D U. 3
5 M
easu re a t S R S c h eck h arn ess c o nnecto r ( 5 ).

Ig nit io n s w it c h : O N

Volt a ge b etw een te rm in al ( 1 1 ) a nd b ody e arth
O K: 9 V o r m ore

Volt a ge b etw een te rm in al ( 1 2) a nd b ody e arth
O K: 9 V o r m ore N
G

B
atte ry ( ± ) c a ble I
n su la tin g ta pe B
atte ry S
D U P
ad c o ve r

C
onnecto r P
ro te ctiv e tu be C
ase M
atin g m ark s P
ro te ctiv e tu be

F
ro nt w ir in g h arn ess
1 . Check c o nnecto r fo r p oor c o nnectio n.
2 . Check h arn esse s fo r b in ds, c o nnecto rs fo r d am age, a nd
t e rm in als fo r d efo rm atio n.
R EPLA C E A N Y C O NNEC TO RS O R H AR NESS T H AT
F A IL T H E V IS U AL C HEC K. ( R efe r to P . 5 2B -3 .)
C au tio n
T he S R S m ay n ot a ctiv ate if S R S h arn esses o r
c o nnecto rs a re d am ag ed o r im pro perly c o nnecte d ,
w hic h c o uld r e su lt in s erio us in ju ry o r d eath t o t h e
v eh ic le 's d riv er.
P O ST-IN STA LLA TIO N C HEC K
R eco nnect th e n egativ e b atte ry te rm in al. T urn th e ig nit io n
k e y to th e ª O Nº p osit io n. D oes th e S R S w arn in g la m p illu m in ate
f o r a bout 7 s e co nds, tu rn o ff a nd th en r e m ain e xtin guis h ed
f o r a t le ast 5 s e co nds? If y e s, S R S s yste m is fu nctio nin g
p ro perly . If n o, c o nsu lt p age 5 2B -6 .

SRS ± Post-collision Diagnosis52B-19
POST-COLLISION DIAGNOSIS52400110154
To inspect and service the SRS after a collision (whether
or not the air bag has deployed), perform the following steps.
SRS DIAGNOSIS UNIT MEMORY CHECK
1. Connect the MUT-II to the diagnosis connector (16-pin).
Caution
Turn off the ignition switch before connecting or
disconnecting the MUT-II.
2. Read (and write down) all displayed diagnosis codes.
(Refer to P. 52B-6.)
NOTE
If the battery power supply has been disconnected or
disrupted by the collision, the MUT-II cannot communicate
with the SRS diagnosis unit. Inspect and, if necessary,
repair the body wiring harness before proceeding further.
3. Read the data list (fault duration and how many times
memories are erased) using the MUT-II.
Data list
No.Service Data ItemApplicability
91How long a problem has lastedMaximum time to be stored: 9999 minutes
(approximately 7 days)
92Number indicating houw often the memory is clearedMaximum time to be stored: 250
4. Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-6.)
REPAIR PROCEDURE
WHEN AIR BAG DEPLOYS IN A COLLISION.
1. Replace the following parts with new ones.

SRS diagnosis unit (SDU) (Refer to P. 52B-26.)

Air bag module (Refer to P. 52B-28.)

Front impact sensors (Refer to P. 52B-23.)

F
ro nt im pact
s e nso r F
orw ard L
ock le ve r S
D U

C
ase
P
ro te ctiv e tu be
P ro te ctiv e tu be