1997 MITSUBISHI TRITON radio

MPI ± Troubleshooting13A-20
Code No.54 Immobilizer systemProbable cause
Range of Check

Ignition switch: ON
Set Conditions

Improper communication between the engine-ECU and immobilizer-ECU
Radio interference of ID codes

Incorrect ID code

Malfunction of harness or connector

Malfunction of immobilizer-ECU

Malfunction of engine-ECU
NOTE
(1) If the ignition switches are close each other when starting the engine, radio interference may cause
this code to be displayed.
(2) This code may be displayed when registering the key ID code.
No
Is there another ignition key near the ignition key that is inserted
in the ignition switch?Ye sRemove the extra ignition key.
NGCheck trouble symptom.
Is a diagnosis code output from the immobilizer-ECU?Ye sCheck the immobilizer system. (Refer to GROUP 54 ± Ignition
Switch and Immobilizer System.)
No
Check the following connectors.
C-19, C-36, C-50NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the immobiliz-
er-ECU.OKReplace the immobilizer-ECU.
NG
Check trouble symptom.NG
RepairNG
Replace the engine-ECU.

54-2
MULTI-METER 35. . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 35. . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 36. . . . . . . . . . . . . . . . .
Voltmeter Simple Test 36. . . . . . . . . . . . . . . . . . . .
MULTI-METER 37. . . . . . . . . . . . . . . . . . . . . . . . . .
OUTSIDE THERMO SENSOR 38. . . . . . .
SERVICE SPECIFICATIONS 38. . . . . . . . . . . . .
OUTSIDE THERMO SENSOR 38. . . . . . . . . . . .
HEADLAMP* 39. . . . . . . . . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS 39. . . . . . . . . . . . .
SPECIAL TOOLS 39. . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 40. . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 46. . . . . . . . . . . . . . . . .
Headlamp Aiming 46. . . . . . . . . . . . . . . . . . . . . . . .
Intensity Measurement 47. . . . . . . . . . . . . . . . . . . .
Bulb Replacement 47. . . . . . . . . . . . . . . . . . . . . . . .
HEADLAMP 48. . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT COMBINATION LAMP* 51. . . . . .
SIDE TURN-SIGNAL LAMP* 52. . . . . . . .
REAR COMBINATION LAMP* 53. . . . . . .
REAR FOG LAMP 54. . . . . . . . . . . . . . . . . .
SPECIAL TOOL 54. . . . . . . . . . . . . . . . . . . . . . . .
REAR FOG LAMP 54. . . . . . . . . . . . . . . . . . . . . .
RHEOSTAT 56. . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 56. . . . . . . . . . . . . . . . . . . . . . . .
RHEOSTAT 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HAZARD WARNING LAMP SWITCH
57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 57. . . . . . . . . . . . . . . . . . . . . . . .
HAZARD WARNING LAMP SWITCH 57. . . . .
HORN 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CIGARETTE LIGHTER 59. . . . . . . . . . . . . .
CLOCK 60. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 60. . . . . . . . . . . . . . . . . . . . . . . .
CLOCK 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RADIO AND TAPE PLAYER 61. . . . . . . .
SPECIAL TOOL 61. . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 61. . . . . . . . . . . . . . . . . . .
Quick-reference Troubleshooting Chart 61. . . . .
Chart 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio and Tape Player with
Anti-theft System 77. . . . . . . . . . . . . . . . . . . . . . . . .
RADIO AND TAPE PLAYER 80. . . . . . . . . . . . .
SPEAKER 81. . . . . . . . . . . . . . . . . . . . . . . . .
ANTENNA 82. . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 82. . . . . . . . . . . . . . . . . . . . . . . .
ANTENNA 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTINUED ON NEXT PAGE

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 System54-11
INSPECTION PROCEDURE FOR DIAGNOSIS CODES

Code No.11 Transponder communication system or radio
interference of ID codeProbable cause

The ID code of the transponder is not sent to the immobilizer-ECU immediately
after the ignition switch is turned to ON position.

If the engine is started while several ignition keys are in the vicinity, then interference
between the different keys may occur, which will cause this code to be generated.
Radio interference of ID code

Malfunction of transponder

Malfunction of ignition key ring antenna

Malfunction of harness or connector

Malfunction of immobilizer-ECU
Are there any other ignition keys in the
vicinity of the ignition key being used
to for starting?Ye sMove other keys well away from key
being used.
NoCheck trouble symptom.
NG
Does the engine start using the spare
ignition key which has had the ID code
registered?OKReplace the ignition key that does not
work.Re-register the ID code
(Refer to P.54-23.)
NG
Diagnosis code checkCode No.12
occurs.To INSPECTION PROCEDURE FOR
DIAGNOSIS CODE No.12.
Code No.11 occurs.
Ignition key ring antenna continuity
check (Refer to P.54-22.)NG
Replace
OK
Check the following connectors:
C-36, C-71NG
Repair
OK
Check trouble symptom.NGCheck the harness between the immobi-
lizer-ECU and key ring antenna.NG
Repair
OK
Replace the immobilizer-ECU.Register the password (secret code)
and ID code. (Refer to P.54-23.)
Code No.12 ID codes are not the same or not registered.Probable cause
The ID code which is sent from the transponder is not the same as the ID code
which is registered in the immobilizer-ECU.
The ID code in the ignition key being used has not
been properly registered.

Malfunction of immobilizer-ECU
Re-register the ID code
(Refer to P.54-23.)Check trouble symptom.NGReplace the immobilizer-ECU.
Register the password (secret code)
and ID code. (Refer to P.54-23.)

CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System54-13
INSPECTION CHART FOR DIAGNOSIS CODES

54300710034
Diagnosis code No.Inspection itemsReference page
11Transponder communication system or radio interference of ID
code54-11
12*ID codes are not the same or not registered54-11
21Communication system between fuel cut valve controller and
immobilizer-ECU54-13
22Malfunction of fuel cut valve controller system54-14
23Identification codes are not identical54-14
31EEPROM abnormality inside immobilizer-ECU54-12
NOTE
*: diagnosis code No.12 is recorded.
INSPECTION PROCEDURE FOR DIAGNOSIS CODES

For diagnosis code numbers other than those listed below, refer to ªPETROL-POWERED VEHICLESº.
Code No.21 Communication system between fuel cut
valve controller and immobilizer-ECU
Probable cause
The confirmation code is not sent from the fuel cut valve controller within the specified
time after the ignition key is turned to ON or, an incorrect code is sent.
Malfunction of harness or connector

Malfunction of fuel cut valve controller

Malfunction of immobilizer-ECU
Check the following connectors: A-90, C-19, C-36NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the immobilizer-ECU and fuel cut valve
controller.NG
Repair
OK
Check the fuel cut valve controller power source and earth circuit.
(Refer to P.54-17, Inspection Procedure 6.)NG
Repair
OK
Check 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 Player54-62
ItemsProblem symptomRelevant chart
Tape playerCassette tape will not be inserted.C-1
No sound.C-2
No sound from one speaker.C-3
Sound quality is poor, or sound is weak.C-4
Cassette tape will not be ejected.C-5
Uneven revolution. Tape speed is fast or slow.C-6
Faulty auto reverse.C-7
Tape gets caught in mechanism.C-8
CHART
A. NOISE
A-1 Noise appears at certain places when travelling (AM).
Is there a particular structure?NoDo the following measures eliminate the
noise?
1. Change to a different station with
a strong signal to boost resistance
to interference.
2. Suppress high tones to reduce
noise.
3. Extend antenna completely.Ye sOK
Ye s
Find out the following information from
the user:
1. Place
2. Locality conditions (valley, moun-
tain, etc.)
3. Name and frequency of stations
affected by noiseNo
If due to vehicle noise:
It may not be possible to prevent noise
if the signal is weak.
If there is more noise than other radios, find out the noise
conditions and the name and frequency of the receiving
stations from the user, and consult with the service centre.
If due to external noise:
In almost all cases, prevention on the
receiver side is impossible. Weak sig-
nals especially are susceptible to inter-
ference.

CHASSIS ELECTRICAL ± Radio and Tape Player54-64
A-3 Mixed with noise, only at night (AM).
The following factors can be considered as possible
causes of noise appearing at night.
1. Factors due to signal conditions: Due to the
fact that long-distance signals are more easily
received at night, even stations that are
received without problem during the day may
experience interference in a general worsening
of reception conditions. The weaker a station
is the more susceptible it is to interference,and a change to a different station or the
appearance of a beating sound* may occur.
Beat sound*: Two signals close in frequency
interfere with each other, creating a repetitious
high-pitched sound. This sound is generated
not only by sound signals but by electrical
waves as well.
2. Factors due to vehicle noise: Alternator noise
may be a cause.
Is the noise still obvious even with the
lamps OFF?No
Ye s
Do the following measures eliminate the
noise?

Tune to a station with a strong signal.

Tune to a station with a strong signal
without completely extending the
antenna.Ye sOK
No
Does the noise fade away when the
vehicle harness is moved away from
the radio chassis? (if the harness is not
in the proper position.)Ye sOK
No
If there is more noise than other radios, consult a service
centre.

CHASSIS ELECTRICAL ± Radio and Tape Player54-65
A-4 Broadcasts can be heard but both AM and FM have a lot of noise.
(1)(2)
Noise occurs when the engine is stopped.
Ye s
Do the following measures eliminate the noise?

Tune to a station with a strong signal.

Extend the antenna completely.

Adjust the sound quality to suppress high tones.Ye s
OK
No
Is the radio body earth mounted securely?NoSecurely tighten the nuts for the body
earth.
Ye s
Is the antenna plug properly connected to the radio?NoCorrectly attach the antenna plug.
Ye s
Is the antenna itself in good condition or is it properly
mounted?NoClean the antenna plug and earth wire
mounting area. Mount the antenna se-
curely.
Ye s
If there is more noise than other radios, consult a service
centre.
Is the noise eliminated?
NoYe s
OK
Noise occurs when the engine in running.
Inspect the vehicle's noise suppressor. (Refer to A-6.)
NOTE
About noise encountered during FM reception only.
Due to differences in FM and AM systems, FM
is not as susceptible as AM to interference from
engines, power lines, lightning, etc. On the other
hand, there are cases due to the characteristicsof FM waves of noise or distortion generated by
typical noise interference (first fading and
multipath). (Refer to A-2.)
as mountainous regions, but this is not due to a
problem with the radio.>