1997 MITSUBISHI TRITON battery

CHASSIS ELECTRICAL ± Battery54-6
BATTERY TESTING PROCEDURE54100120107
TEST STEP
(1) Turn headlamps on for 15 seconds.
(2) Turn headlamps off for 2 minutes to allow battery voltage to
stabilize.
(3) Disconnect cables.
OK
Read open circuit voltage.
OK:Open circuit voltage is more than 12.4 VNGCharge battery at 5 amps. (see LOAD TEST RATE CHART)
RetestOK
(1) Connect a load tester to the battery.
(2) Load the battery at the recommended discharge rate (see LOAD
TEST RATE CHART) for 15 seconds.
(3) Read voltage after 15 seconds, then remove load.
(4) Compare the measured value with the minimum voltage (see
LOAD TEST CHART).
OK:Higher than minimum voltageNG
Replace battery
OK
Normal
LOAD TEST RATE CHART
Battery type50B24R55D23R55B24R75D26R80D26R95D31R
Charging time when fully discharged h
[5-amp rated current charging]8108121214
Load test (Amps)190170210240290310
LOAD TEST CHART
Temperature
C21 and
above16104±1±7±12±18
Minimum voltage V9.69.59.49.39.18.98.78.5

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-10
Immobilizer System
Caution
1. The ID code should always be re-registered when replacing the immobilizer-ECU. vehicles>
2. If the immobilizer-ECU has been replaced, you will need to re-register the ignition key ID codes
and to reset the code for the fuel cut valve controller to the factory setting. vehicles>
3. If the immobilizer-ECU has been replaced with a new part, the password (vehicle secret code)
which has been stored in the immobilizer-ECU for each vehicle will be replaced by the password
(secret code) specified by the customer.
STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING54300690024
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION54300700116
DIAGNOSIS CODES CHECK
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
ERASING DIAGNOSIS CODES
Refer to GROUP 00 ± How To Use Troubleshooting/Inspection Service Points.
Caution
The diagnosis codes which result from disconnecting the battery cables cannot be erased.
INSPECTION CHART FOR DIAGNOSIS CODES

54300710027
Diagnosis code No.Inspection itemsReference
page
11Transponder communication system or radio interference of ID code54-11
12*ID code are not the same or are not registered54-11
21Communication system between MUT-II and engine-ECU54-12
31EEPROM abnormality inside immobilizer-ECU54-12
NOTE
*: Diagnosis code No. 12 is not recorded.

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-16
Inspection Procedure 3
Engine does not start (Cranking but no initial combus-
tion).
Probable cause
If the fuel injectors are not operating, there might be a problem with the MPI system
in addition to a malfunction of the immobilizer system.
It is normal for this to occur if an attempt is made to start the engine using a key
that has not been properly registered.
Malfunction of MPI system

Malfunction of immobilizer-ECU
Check the system voltage during crank-
ing
OK:8 V or moreNGCheck the battery.
OK
Is a diagnosis code displayed from the
immobilizer-ECU?Ye sTo INSPECTION CHART FOR DIAG-
NOSIS CODE. (Refer to P.54-10.)
No
Is a diagnosis code displayed from the
engine-ECU?Ye sRefer to GROUP 13A ± Troubleshoot-
ing.
No
Check the starting system. (Refer to
GROUP 13A ± Troubleshooting.)
OK
Check trouble symptom.
NG
Check the immobilizer-ECU power
source and the earth circuit. (Refer to
P.54-17, Inspection Procedure 5.)OKCheck trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code)
and the ID code. (Refer to P.54-23.)
Inspection Procedure 4
Engine does not start (Cranking but no initial combus-
tion).
Probable cause
If no fuel injection, there might be a problem with the fuel injection system in addition
to a malfunction of the immobilizer system.
It is normal for this to occur if an attempt is made to start the engine using a key
that has not been properly registered.
Malfunction of diesel fuel injection system

Malfunction of immobilizer-ECU
Check the system voltage during crank-
ing
OK:8 V or moreNGCheck the battery.
OK
Is a diagnosis code displayed from the
immobilizer-ECU?Ye sTo INSPECTION CHART FOR DIAG-
NOSIS CODE. (Refer to P.54-13.)
No
Check the diesel fuel injection system.
(Refer to GROUP 13E ± On-vehicle Ser-
vice.)
OK
Check the immobilizer-ECU power sup-
ply and the earth circuit. (Refer to
P.54-17, Inspection Procedure 5.)OKCheck trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code),
reset the code to the factory setting and
register the ID code. (Refer to P.54-23.)
Check trouble symptom.
NG
Replace the fuel cut valve controller
(fuel injection pump assembly).

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.

2
INSPECTION
· Check the SRS-ECU and brackets for dents, cracks or
deformation.
· Check connectors and lock lever for damage, and
terminals for deformation
Caution
If a dent, crack, deformation or rust is discovered,
replace the SRS-ECU with a new one.
NOTE
For checking of the SRS-ECU other than described
above, refer to the section concerning troubleshooting.
(Refer to P.52B-5.)
AIR BAG MODULES AND CLOCK SPRING
Caution
1. Disconnect the battery (-) terminal and wait
for 60 seconds or more before starting
work. Furthermore, the disconnected
battery terminal should be covered with
tape to insulate it. (Refer to P.52B-3)
2. Never attempt to disassemble or repair the
air bag modules or clock spring.
If faulty, replace it.
3. do not drop the air bag modules or clock
spring or allow contact with water, grease
or oil.
Replace it if a dent, crack, deformation or
rust is detected.4. The air bag modules should be stored on a
flat surface and placed so that the pad
surface is facing upward.
Do not place anything on top of it.
5. Do not expose the air bag modules to
temperatures over 93° C.
6. After deployment of an air bag, replace the
clock spring with a new one.
7. Wear gloves and safety glasses when
handling air bags that have already
deployed.
8. An undeployed air bag module should only
be disposed of in accordance with the
procedures (Refer to P.52B-31.)
52B-22SRS - SRS-ECU/Air Bag Modules and Clock Spring
52400220031
After deployment of an air bag, replace the
air bag modules. Check the clock spring,
and if faulty, replace it with a new part.
52400240044

4
INSPECTION
· Check the SDU and brackets for dents, cracks or
deformation.
· Check connector for damage, and terminals for
deformation
Caution
If a dent, crack, deformation or rust is discovered,
replace the SDU with a new one.
NOTE
For checking of the SDU other than described above,
refer to the section concerning troubleshooting. (Refer to
P.52B-6.)
AIR BAG MODULES AND CLOCK SPRING
Caution
1. Disconnect the battery (-) terminal and wait
for 60 seconds or more before starting
work. Furthermore, the disconnected
battery terminal should be covered with
tape to insulate it. (Refer to P.52B-3)
2. Never attempt to disassemble or repair the
air bag modules or clock spring.
If faulty, replace it.
3. do not drop the air bag modules or clock
spring or allow contact with water, grease
or oil.
4. Replace it if a dent, crack, deformation or
rust is detected.
4. The air bag modules should be stored on a
flat surface and placed so that the pad
surface is facing upward.
Do not place anything on top of it.
5. Do not expose the air bag modules to
temperatures over 93° C.
6. After deployment of an air bag, replace the
clock spring with a new one.
7. Wear gloves and safety glasses when
handling air bags that have already
deployed.
8. An undeployed air bag module should only
be disposed of in accordance with the
procedures (Refer to P.52B-31.)
52B-28SRS - SRS Diagnosis Unit (SDU)/Air Bag Modules and Clock Spring
52400220093
After deployment of an air bag, replace the
air bag modules. Check the clock spring, and
if faulty, replace it with a new part.

52400240143

11
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
None of the doors can be locked or unlocked using
the transmitter.Probable cause
The cause may be a malfunction of the transmitter or ETACS-
ECU, defective connection between ETACS-ECU and junction
block, defective power supply voltage to ETACS-ECU input
line due to commercial equipment, or the lock and unlock sig-
nals are not being sent to the ETACS-ECU.•
Malfunction of transmitter
•
Malfunction of ETACS-ECU
•
Malfunction of key reminder switch
•
Malfunction of wiring harness or connector
•
Malfunction of door switch
•
Defective connection between ETACS-ECU and
junction block
•
Defective power supply voltage to ETACS-ECU
input line due to commercial equipment
Check the central door lock systemCan the doors be locked and unlocked by the pas-
senger’s-side door key cylinder and lock knob?
YesNo
Has the encrypted code been registered properly? * NG Re-register the encrypted code. (Refer to P.42.6)
OK
Replace the transmitter battery. (Refer to P.42-6)
NG
Is a commercial equipment equipped?
NoYes
Remove that equipment, and then check trouble
symptoms.
NG
Check the connection between ETACS-ECU and
junction block claw.NG
Repair
OK
NG .Check the following connectors:
A-56X, C-81, C-91
OK NG
Measure at the ETACS-ECU connector C-91.
•
Disconnect the connector, and measure at the
harness side.
•
Voltage between 2 and body earth
OK:
System voltageCheck trouble symptomsRepair
OK NG
Check the harness wire, and repair if necessary.
•
Between fusible link No.5 and ETACS-ECU
Door switch continuity check
OK NG
Mut-II Pulse Check
•
Door switch input signal
OK:
MUT-II Buzzer sounds once when opening
and closing each door.NG
Repair
OK
Check the following connectors:
C-110, D-03, D-07, D-14, D-17, D-21
OK NG
Check trouble Symptoms.Repair
NG
To next pageCheck the harness wire, and repair if necessary.
•
Between ETACS-ECU and door switch
NOTE
*: This should be done if a transmitter, receiver or ETACS-ECU has been replaced, and if a secret cod
has not been registered properly
BODY – Keyless Entry System42-3

5
4.
Remedy the malfunctions indicated by th
diagnosis codes, disconnect the diagnosis code
check harness, and then install the valve relay.
Then turn the ignition switch to ON again t
check the ABS warning lamp. (Refer to P.35-36-
16.) If the lamp indicates a malfunction, th
valve relay system may be detective. (Refer to
P.35-36-14.)
ERASING DIAGNOSIS CODES
With the MUT-II
Connect the MUT-II to the diagnosis connector (16-
pin), and then erase the diagnosis codes.
Without the MUT-II
Remove the battery cable from the battery (-)
terminal for 10 seconds or more, and the
reconnect the cable.
See next page.
SERVICEBRAKES – ABS Troubleshooting 35-36-4