1997 MITSUBISHI TRITON Workshop Manual

T
R O UBLE SH O OTIN G 4230007011 5
D IA G NO SIS F U NCTIO N
I N PU T S IG NAL IN SPEC TIO N P O IN TS
< V EH IC LE S W IT H E TA CS-E C U>
1 . Connect th e M UT-II to th e d ia gnosis c o nnecto r.
2 . If b uzze r o f th e M UT-II s o unds o nce w hen d oor lo ck
a ctu ato r s w it c h is o pera te d ( L O CK/U NLO CK), th e
E TA C S-E C U in put s ig nal fo r th at s w it c h c ir c u it s yste m
i s n orm al.
I N SPEC TIO N C HART F O R T R O UBLE S YM PTO M S
T ro uble s ym pto m I
n sp ectio n
p ro ce dure R
efe re nce
p age P
ow er
w in dow s T
he p ow er w in dow s c a nnot b e o pera te d b y a ny o f th e p ow er
w in dow s w it c h es. 1 4
2-2 1 D
riv e r's s id e p ow er w in dow c a nnot b e o pera te d b y th e p ow er
w in dow m ain s w it c h . 2 4
2-2 2 P
asse nger's s id e a nd r e ar p ow er w in dow s c a nnot b e o pera te d
b y th e p ow er w in dow m ain s w it c h . ( H ow eve r, th ey c a n b e
o pera te d b y th e p ow er w in dow s u b-s w it c h es.) 3 4
2-2 3 P
asse nger's s id e a nd r e ar p ow er w in dow s c a nnot b e o pera te d
b y th e p ow er w in dow s u b-s w it c h es. ( H ow eve r, th ey c a n b e
o pera te d b y th e p ow er w in dow m ain s w it c h .) 4 4
2-2 3 P
asse nger's s id e a nd r e ar p ow er w in dow s c a nnot b e o pera te d
b y b oth th e p ow er w in dow s u b-s w it c h es a nd b y th e p ow er
w in dow m ain s w it c h . 5 4
2-2 4 W
hen th e g la ss is r a is e d, it th en lo w ers a uto m atic a lly . 6 4
2-2 6 T
he g la ss is n ot lo w ere d w hen s o m eth in g is ja m med in th e
w in dow . 7 4
2-2 6 W
hen th e g la ss is fu lly r a is e d, it th en lo w ers a uto m atic a lly . 8 4
2-2 7 D
oor lo ckin g m
ech anis m N
one o f th e d oor lo ck fu nctio ns o pera te . 9 4
2-2 7 m
ech anis m N
one o f th e d oors lo ck o r u nlo ck w hen th e d riv e r's s id e in sid e
d oor lo ckin g k n ob is o pera te d ( in clu din g b y m eans o f th e d oor
k e y). 1
0 4
2-2 8 S
om e d oors d o n ot lo ck o r u nlo ck. 1
1 4
2-2 8

BODY ± Door42-21
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
The power windows cannot be operated by any of the
power window switches.
Probable cause
The cause may be a malfunction of the power window relay and of the power window
relay drive circuit.
Malfunction of power window relay

Malfunction of wiring harness or connector
Power window relay continuity check.
(Refer to P.42-38.)NG
Replace
OK
Measure at the power window relay con-
nector C-78.

Disconnect the connector and
measure at the harness side.

Voltage between 3 and body earth

Voltage between 4 and body earth
OK:System voltageNGCheck the following connectors:
C-01, C-78, C-88, C-89NG
Repair
OK
Check trouble symptoms.
OK
Measure at the power window relay con-
nector C-78.

Disconnect the connector and
measure at the harness side.

Continuity between 2 and body earth
OK:ContinuityNGCheck the following connector:
C-78NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
C-17, C-39, C-78, D-04, D-16, D-22,
E-03, E-04, E-13, E-15OKCheck trouble symptoms.
NG
RepairNG
Check the harness wire between ignition
switch (IG2) and power window relay,
between fusible link No.4 and power win-
dow relay, and repair if necessary.
NG
Check the harness wire between power
window relay and the earth, and repair
if necessary.
NG
Check the harness wire between power
window relay and power window main
switch, between power window relay
and power window sub-switch, and re-
pair if necessary.

BODY ± Door42-22
Inspection Procedure 2
Driver's side power window cannot be operated by the
power window main switch.
Probable cause
The cause may be a malfunction of the earth circuit in the power window main switch
or of the power supply circuit for the power window motor.
The cause may also be a malfunction of the control circuit inside the power window
main switch.
Malfunction of power window motor

Malfunction of power window main switch

Malfunction of wiring harness or connector
Power window motor (driver's side)
check (Refer to P.42-38.)NG
Replace
OK
Measure at the power window main
switch connector E-03.

Voltage between 1 and body earth
(When main switch is at UP)

Voltage between 5 and body earth
(When main switch is at DOWN)
OK:System voltageNGCheck the following connectors:
E-03, E-11NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
C-39, E-03NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between power
window main switch and earth.NG
Repair
OK
Replace the power window main switch.NG
Check the harness wire between power
window main switch and power window
motor (driver's side), and repair if neces-
sary.

BODY ± Door42-23
Inspection Procedure 3
Passenger's side and rear power windows cannot be
operated by the power window main switch. (However,
they can be operated by the power window sub-switches.)
Probable cause
The cause may be a malfunction of the power window main switch, or an open circuit
or short-circuit in the communication line.
Malfunction of power window main switch

Malfunction of wiring harness or connector

Measure at the power window main
switch connector E-03 and power win-
dow sub-switch connector E-13.

Disconnect the connector and
measure at the harness side.

Continuity between 2 (main switch
side) and 8 (sub-switch side)
OK:Continuity

Continuity between 2 (main switch
side) and the earth
OK:No continuityNGCheck the following connectors:
C-17, C-39, E-03, E-13NG
Repair
OK
Check the following connectors:
E-03, E-13OKCheck trouble symptoms.
NG
Repair

Measure at the power window main
switch connector E-03 and power win-
dow sub-switch connector E-04
or E-15 .

Disconnect the connector and
measure at the harness side.

Continuity between 2 (main switch
side) and 8 (sub-switch side)
OK:Continuity

Continuity between 2 (main switch
side) and the earth
OK:No continuityNGCheck the following connectors:
C-39, D-16, D-22, E-03, E-04
C-39, D-04, D-22, E-03, E-15NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
E-03, E-04
E-03, E-15OKCheck trouble symptoms.
NG
RepairOK
Check trouble symptoms.NGCheck the harness wire between power
window main switch and power window
sub-switch, and repair if necessary.
NG
Replace the power window main switch. NG
Check the harness wire between power
window main switch and power window
sub-switch, and repair if necessary. NG
Replace the power window main switch.
Inspection Procedure 4
Passenger's side and rear power windows cannot be
operated by the power window sub-switches. (However,
they can be operated by the power window main switch.)
Probable cause
The cause may be a malfunction of the power window sub-switch.
Malfunction of power window sub-switch
Replace the power window sub-switch

BODY ± Door42-24
Inspection Procedure 5
Passenger's side and rear power windows cannot be
operated by both the power window sub-switches and by
the power window main switch.
Probable cause
One of the following items can be defective:

Power supply circuit of the power window sub-switch

Earth circuit

Power window motor

Lock switch

Power window main switch

Power window sub-switch
Malfunction of power window main switch

Malfunction of power window sub-switch

Malfunction of power window motor

Malfunction of wiring harness or connector

Power window motor (passenger's side)
check (Refer to P.42-38.)NG
Replace
OK
Measure at the power window sub-
switch connector E-13.

Disconnect the connector and
measure at the harness side.

Voltage between 1 and body earth
OK:System voltageNGCheck the following connectors:
C-17, E-13NG
Repair
OK
Check trouble symptoms.
OK
Measure at the power window sub-
switch connector E-13.

Voltage between 3 and body earth
(When main switch is at DOWN)

Voltage between 6 and body earth
(When main switch is at UP)
OK:System voltageNGCheck the following connectors:
C-17, E-13NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and the earth.NG
Repair
OK
Replace the power window sub-switch.
OK
Check the following connectors:
E-13, E-22NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and power window
motor (passenger's side).OKReplace the power window main switch.
NG
RepairNG
Check the harness wire between power
window relay and power window sub-
switch, and repair if necessary.

BODY ± Door42-25

Power window motor check
(Refer to P.42-38.)NG
Replace
OK
Measure at the power window sub-
switch connector E-04 or E-15
.

Disconnect the connector and
measure at the harness side.

Voltage between 1 and body earth
OK:System voltageNGCheck the following connectors:
C-78, D-16, D-22, E-04
C-78, D-04, D-22, E-15NG
Repair
OK
Check trouble symptoms.
OK
Measure at the power window sub-
switch connector E-04 or E-15
.

Voltage between 3 and body earth
(When main switch is at DOWN)

Voltage between 6 and body earth
(When main switch is at UP)
OK:System voltageNGCheck the following connectors:
D-16, D-22, E-04
D-04, D-22, E-15NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and the earth.NG
Repair
OK
Replace the power window sub-switch.
OK
Check the following connectors:
E-04, E-07
E-15, E-18NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between power
window sub-switch and power window
motor.OKReplace the power window main switch.
NG
RepairNG
Check the harness wire between power
window relay and power window sub-
switch, and repair if necessary.

BODY ± Door42-26
Inspection Procedure 6
When the glass is raised, it then lowers automatically.
Probable cause
If the sliding resistance is too large when the glass is being raised, it is judged that
something is jammed in the window, and the window is lowered by approximately
150 mm.
Incorrect window glass adjustment

Glass slider is incorrectly installed or warped

Malfunction of power window main switch or sub-switch
Does the glass move in the opposite direction when the power
window drive current is above the following value? (Refer to
P.42-30.)
Drive current:
4 ± 7 A
3.5 ± 6.5 AYESAdjust the window glass. (Refer to P.42-29.)
Adjust or replace the power window. (Refer to P.42-29.)
NO
Driver's side: Replace the power window main switch.
Passenger's side: Replace the power window sub-switch.
Inspection Procedure 7
The glass is not lowered when something is jammed in the
window.
Probable cause
The safety mechanism is released under the following conditions, and the window
will not be lowered even if something becomes jammed in it.

If the limit switch is always off

If there is an open circuit in the harness between the limit switch and the power
window main switch or the power window sub-switch

If the limit switch turns off before the set value is reached

If the window is within 12 mm of being fully closed (normal setting to prevent
the window from being lowered)
Malfunction of limit switch

Malfunction of wiring harness

Malfunction of power window main switch or sub-switch

Incorrect limit switch operation position
Limit switch operation position adjustment (Refer to P.42-39.)
Check trouble symptoms.
NG
Limit switch continuity check (Refer to P.42-39.)NG
Replace
OK
Check the following connectors:
C-39, E-03, E-10
C-17, E-13, E-21
D-16, D-22, E-04, E-08
D-04, D-22, E-15, E-19NG
Repair
OK
Check trouble symptoms.
NG
Check the harness between the limit switch and the power window
main switch and between the limit switch and the power window
sub-switch, and between the limit switch and the earth.OKDriver's side: Replace the power window main switch.
Passenger's side: Replace the power window sub-switch.
NG
Repair

BODY ± Door42-27
Inspection Procedure 8
When the glass is fully raised, it then lowers
automatically.
Probable cause
When the window is within 12 mm of being fully closed, the limit switch turns off
to prevent the window from being lowered. However, the above problem can occur
if there is a malfunction of the limit switch or a short-circuit in a harness.
Malfunction of limit switch

Malfunction of wiring harness or connector

Malfunction of power window main switch or sub-switch

Incorrect limit switch operation position
Limit switch operation position adjustment (Refer to P.42-39.)
Check trouble symptoms.
NG
Limit switch continuity check (Refer to P.42-39.)NG
Replace
OK
Check the following connectors:
E-03, E-10
E-13, E-21
E-04, E-08
E-15, E-19NG
Repair
OK
Check trouble symptoms.
NG
Check the harness between the limit switch and the power window
main switch or between the limit switch and the power window
sub-switch.OKDriver's side: Replace the power window main switch.
Passenger's side: Replace the power window sub-switch.
NG
Repair
Inspection Procedure 9
None of the door lock functions operate.
Probable cause
The cause may be a malfunction of the ETACS-ECU power supply circuit system
or of the earth circuit system.
Malfunction of ETACS-ECU

Malfunction of wiring harness or connector
Measure at the J/B connector C-81,
C-82.

Remove the ETACS-ECU and
measure at the J/B side.

Voltage between 1 and body earth
(C-82)

Voltage between 6 and body earth
(C-81)
OK:System voltageNGCheck the following connectors:
A-56X, C-81, C-82NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
C-87, C-91NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between ET-
ACS-ECU and the earth.NG
Repair
OK
Replace the ETACS-ECU.NG
Check the harness wire between fusible
link No.6 and J/B, and repair if neces-
sary.