1997 MITSUBISHI TRITON fuse

CHASSIS ELECTRICAL ± Headlamp54-44
Inspection procedure 6
The headlamps do not illuminate when the vehicle is in the
following condition and the ignition switch is moved to the
ON position. However, they illuminate when the lighting
switch is moved to the HEAD position.


Lighting switch: OFF

Passing switch: OFF
Probable cause
The cause is probably a malfunction of the daytime running lamp control unit (DRL-ECU)
circuit system. If there is a blown fuse, there may also be a short-circuit in a harness.
Malfunction of fuse

Malfunction of connector

Malfunction of harness wire

Malfunction of the DRL relay (1)

Malfunction of the DRL-ECU
DRL relay (1) check
(Refer to P.54-50.)NG
Replace
OK
Disconnect the DRL relay (1) connector
A-12 and measure at the harness side.

Ignition switch: ON
1. Voltage between terminal No.4 and
earth
OK:System voltage
2. Voltage between terminal No.3 and
earth
OK:System voltage when the
lighting switch is at HEAD and
0 V when it is at OFF.
3. Continuity between terminal No.1
and earth
OK:Continuity1. NGCheck the following connectors:
A-12, A-16, C-81, C-88NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
DRL relay (1) and the ignition switch.
Repair, if necessary.
2. NGCheck the following connectors:
A-12, A-16, A-20, A-34NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
DRL relay (1) and the headlamp. Repair,
if necessary.
3. NGCheck the following connectors:
A-12, A-19NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
DRL relay (1) and the body earth. Repair,
if necessary.OK
Malfunction of the DRL-ECU
Replace

CHASSIS ELECTRICAL ± Headlamp54-45
Inspection procedure 7
The headlamps do not switch off when the vehicle is in the
following condition and the lighting switch is moved to the
TAIL position.


Ignition switch: OFF

Passing switch: OFF
Probable cause
The cause is probably a malfunction of the daytime running lamp control unit (DRL-ECU)
circuit system. If there is a blown fuse, there may also be a short-circuit in a harness.
Malfunction of fuse

Malfunction of connector

Malfunction of harness wire

Malfunction of the tail lamp relay

Malfunction of the DRL-ECU
Lighting switch check
(Refer to P.54-49.)NG
Replace
OK
Disconnect DRL-ECU connector A-10
and measure at the harness side.

Continuity between terminal No.10
and earth
OK:ContinuityNGCheck the following connectors:
A-10, A-19NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
DRL-ECU and the body earth. Repair,
if necessary.
OK
Tail lamp relay check
(Refer to P.54-49.)NG
Replace
OK
Disconnect the DRL-ECU connector
A-10 and measure at the harness side.

Voltage between terminal No.5 and
earth
OK: System voltageNGCheck the following connectors:
A-10, A-16, A-55XNG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
DRL-ECU and the fusible link No.3. Re-
pair, if necessary.OK
Malfunction of the DRL-ECU
Replace

CHASSIS ELECTRICAL ± Radio and Tape Player54-70
A-9 Ever-present noise.
Noise is often created by the following factors, and
often the radio is OK when it is checked individually.

Travelling conditions of the vehicle

Terrain of area travelled through

Surrounding buildings

Signal conditions

Time periodFor this reason, if there are still problems with noise
even after the measures described in steps A-1
to A-8 have been taken, get information on the
factors listed above as well as determining whether
the problem occurs with AM or FM, the station
names, frequencies, etc., and contact a service
centre.
B. RADIO
B-1 No power is supplied when the switch is set to ON.
Is dedicated fuse No. 4 blown or is the circuit open?Ye sReplace fuse or repair harness.
No
Is the connector at the back of the radio connected properly?NoConnect connector securely.
Ye s
Disconnect and check the connector at the rear of the radio. Is
the ACC power (12 V) being supplied to the radio?NoRepair harness.
Ye s
Repair or replace radio.
B-2 No sound from one speaker.
Check to see if there is any sound when
attached to another radio.Ye sRepair or replace radio.
No
Remove the connector on the back of
the radio and check the speaker harness
for conductance.Ye sIt conducts electricity but is shorted out.Repair speaker harness.
No
Check the speaker for conductance.Ye sRepair speaker harness and ensure
proper connection of relay connectors.
No
Repair or replace speaker.

CHASSIS ELECTRICAL ± Radio and Tape Player54-73
B-8 Insufficient memory (preset stations are erased).
Is dedicated fuse No. 5 blown or is the circuit open?Ye sReplace fuse or repair harness.
No
Disconnect and check the connector at the rear of the radio.
Is the memory backup (battery) power being supplied?NoRepair harness.
Ye s
Repair or replace radio.
C. TAPE PLAYER
C-1 Cassette tape will not be inserted.
Are there any foreign objects in the tape player?Ye sRemove the object(s)*1
No*1
Attempting to force a foreign object (e.g., a coin or clip, etc.) out
of the tape player may damage the mechanism. The player should
be taken to a service dealer for repair.
Does the tape player work if another tape is inserted?Ye sReplace tape*2
No
Repair or replace tape player.
*2
Ensure that the tape label is not loose, that the tape itself is not
deformed and that the tape is tightly wound. Also, tape of C-120
or greater length often get caught in the mechanism and should
not be used.
C-2 No sound (even after a tape has been inserted).
Is dedicated fuse No. 4 blown or is the circuit open?Ye sReplace fuse or repair harness.
No
Is connector at rear of radio connected tightly?NoConnect connector firmly.
Ye s
Disconnect connector at rear of radio. Is ACC power being supplied
to the radio?Ye sRepair or replace tape player.
No
Repair harness.

13
INSPECTION PROCEDURE 3
Encrypted codes cannot be registered Probable cause
The cause may be a malfunction of the diagnosis con-
nector, ETACS-ECU or diagnosis output circuit.•
Malfunction of MUT-II
•
Malfunction of connector or wiring harness
•
Malfunction of ETACS-ECU
NGCheck the following connectors:
C-35, D-110
OK NG
Check trouble symptomsRepair
NG
Measure at diagnosis connector C-35 and ETACS-
ECU connector D-110.
•
Disconnect the connector, and measure at har
ness side.
•
Continuity between following terminals:
OK:
Continuity
28 - 9 side>Check the harness wire, and repair if necessary.
•
Between the ETACS-ECU and diagnosis connector
OK
Can the MUT-II communicate with other systems?
Yes No
NGCheck the following connectors:
A-56X, C-35, C-79, C-81
OK NG
Check trouble symptoms.Repair
Measure at the diagnosis
connector C-35
•
Voltage between 16
and body earth
OK:
System voltage
NG
OKCheck the harness wire, and repair if necessary.
•
Between fusible link No.5 and diagnosis connector
OK
Replace MUT-II.Measure at the diagnosis
connector C-35.
•
Continuity between 4
and body earth
•
Continuity between 5
and body earth
OK:
System voltage
NG
NG
RepairCheck the following
connectors:
C-35, C-86
OK
Check trouble symptoms.NG
Check the harness wire, and repair if necessary.
•
Between the diagnosis connector and earth
NG
Check the following connectors:
A-56X, C-81, C-82, C-88, C-91
OK NG
Check trouble symptomsRepair
NG
Measure at the ETACS-ECU connector C-91.
•
Disconnect the connector, and measure at the
harness side
•
Voltage between 1 and body earth
•
Voltage between 2 and body earth
•
Voltage between 3 and body earth
OK:
System voltage
OKCheck the harness wire, and repair if necessary.
•
Between dedicated fuse No.6 and ETACS-ECU
•
Between ignition switch (IG1) and ETACS-ECU
Check the following connectors:
C-86, C-91
OK NG
Check trouble symptoms.
Repair
Measure at the ETACS-ECU connectors C-91
•
Disconnect the connector, and measure at the
harness side.
•
Between 10 for connector C-91 and body earth
OK:
System voltage
NG
OK
Replace the ETACS-ECU.Check the harness wire, and repair if necessary.
•
Between the ETACS-ECU and earth
BODY – Keyless Entry System42-5