1997 MITSUBISHI TRITON engine

ABS <2WD> ± Troubleshooting35B-14
INSPECTION CHART FOR TROUBLE SYMPTOMS35201140142
Get an understanding of the trouble symptoms and check according to the inspection procedure chart.
Trouble symptomsInspection
procedure No.Reference
page
Communication with MUT-II
is notpossible
Communication with all systems is not possible.135B-15
is not ossible.
Communication with ABS only is not possible.235B-15
When the ignition key is turned to ªONº (engine stopped), the ABS warning lamp does
not illuminate.335B-16
After the engine starts, the ABS warning lamp remains illuminated.435B-16
When the ignition key is turned to ªSTARTº, the ABS warning lamp does not illuminate.535B-17
After the ignition key is turned to ªONº, the ABS warning lamp blinks twice, and when
turned to ªSTARTº, it illuminates. When returned to ªONº, the lamp flashes once, and
then switches off.635B-17
Faulty ABS operationUnequal braking power on both sides735B-18
Insufficient braking power
ABS operates under normal braking conditions
ABS operates before vehicle stops under normal
braking conditions
Large brake pedal vibration (Caution 2.)±±
Caution
1. If steering movements are made when driving at high speed, or when driving on road surfaces
with low frictional resistance, or when passing over bumps, the ABS may operate even though
sudden braking is not being applied. Because of this, when getting information from the customer,
check if the problem occurred while driving under such conditions as these.
2. During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such
phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent
the wheels from locking and is not an abnormality.

ABS <2WD> ± Troubleshooting35B-16
Inspection Procedure 3
When ignition key is turned to ºONº (engine stopped),
ABS warning lamp does not illuminate.
Probable cause
When current flows in the ABS-ECU, the valve relay turns from off to on, off and
back to on again as the initial check. So the ABS warning lamp will illuminate twice
when the valve relay is off even if there is a problem with the circuit between the
ABS warning lamp and the ABS-ECU.
Therefore, if the lamp does not illuminate, the cause may be: an open circuit in the
lamp power supply circuit, a blown lamp bulb, an open circuit in both the circuit between
the ABS warning lamp and the ABS-ECU and in the circuit between the ABS warning
lamp and the valve relay.
Blown fuse

Burnt out ABS warning lamp bulb

Malfunction of wiring harness or connector
OK
Check trouble symptoms.NGReplace the combination meter. NG
Repair
OK
Check the following connectors.
C-88, C-79, C-06, C-05 and C-02
OK
Check the harnesses between the valve
relay and connector C-02 and between
the ABS-ECU and connector C-02. Re-
pair if necessary.
OK
Measure at connector C-02:

Disconnect the connector and
measure at the male pin.

Ignition switch: ON

Does the ABS warning lamp
illuminate when terminal (3) is
earthed?
OK:IlluminatesNGCheck whether the ABS warning lamp
bulb is burnt out.NGReplace the ABS warning lamp bulb.
Fuse inspection, Multi-purpose fuse No.
11NGRefer to GROUP 00 ± Inspection Ser-
vice Points for a Blown Fuse.
Inspection Procedure 4
Even after the engine is started, the ABS warning lamp
remains illuminated.
Probable cause
The cause is probably a short-circuit in the ABS warning lamp illumination circuit.
Malfunction of combination meter

Malfunction of ABS-ECU

Malfunction of wiring harness
NOTE
This trouble symptom is limited to cases where communication with the MUT-II is possible (ABS-ECU
power supply is normal) and the diagnosis code is a normal diagnosis code.
No
Check the harnesses between the combination meter and the ABS-
ECU and between the combination meter and the valve relay. Repair,
if necessary.
No

Disconnect ABS-ECU connector C-64.

Disconnect valve relay connector A-39.

Ignition switch: ON

Does the ABS warning lamp switch off?Ye sReplace the ABS-ECU.
Disconnect connector C-02 and turn the ignition switch to ON.

Does the ABS warning lamp remain illuminated?Ye sReplace the combination meter.

ABS <2WD> ± Troubleshooting35B-21
Connector
terminal No.SignalChecking requirementsNormal condition
43Idle-up solenoid valve (±)Ignition switch: ON (The motor is on approximately
1 second after engine is started.)2 V or less
46Ignition switchIgnition switch: ONSystem voltage
Ignition switch: START0 V
47Input from diagnosis indication
selection
Connect the MUT-II.0 V
selection
Do not connect the MUT-II.Approx. 12 V
48Input from valve relay monitorIgnition switch: ONSystem voltage
49Motor monitorIgnition switch: ON
Approximately 1 second after
Motor is on.System voltage
A roximately 1 second after
engine is startedMotor is off.0.5 V or less
50Output to ABS warning lampIgnition
switch: ON
The lamp is switched off.System voltage
switch: ON
The lamp is illuminated.0 ± 2 V
52Output to front-right hydraulic
unit solenoid valve (IN side)Ignition switch: ON (When solenoid valve is off
approximately 1 second after engine is started.)System voltage

ABS <4WD> ± Troubleshooting35C-5
TROUBLESHOOTING35101110143
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 ± How to Use Troubleshooting/Inspection Service Points.
NOTES WITH REGARD TO DIAGNOSIS
The phenomena listed in the following table are not abnormal.
PhenomenonExplanation of phenomenon
System check soundWhen starting the engine, a thudding sound can sometimes be heard coming from inside
the engine compartment, but this is because the system operation check is being
performed, and is not an abnormality.
ABS operation sound1. Sound of the motor inside the ABS hydraulic unit operation. (whine)
2. Sound is the generated along with vibration of the brake pedal. (scraping)
3. When ABS operates, sound is generated from the vehicle chassis due to repeated
brake application and release.
(Thump: suspension; squeak: tyres)
ABS operation
(Long braking distance)For road surfaces such as snow-covered roads and gravel roads, the braking distance for
vehicles with ABS can sometimes be longer than that for other vehicles. Accordingly, advise
the customer to drive safely on such roads by lowering the vehicle speed and not being too
overconfident.
Shock during system
operation checkShock may be felt when the brake pedal is depressed slightly at a low driving speed. This
occurs due to ABS operation check (check at a vehicle speed of 8 km/h after starting), and
does not indicate any malfunction.
Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the ªCommentº are satisfied when checking the trouble
symptom again.
DIAGNOSIS FUNCTION35201120108
DIAGNOSIS CODES CHECK
Read a diagnosis code by the MUT-II or ABS warning lamp.
(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.

ABS <4WD> ± Troubleshooting35C-13
Connector
terminal
No.SignalChecking requirementsNormal condition
37Output to valve relayIgnition
switch: ONApproximately 1 second
after engine is started.
The relay is on.2 V or less
The system runs down.
The relay is off.System voltage
38Output to motor relayIgnition switch: ON
(Approximately 1 second
Motor is on2 V or less
(A roximately 1 second
after engine is started)Motor is offSystem voltage
39Idle-up solenoid valve (+)Ignition switch: ON (When motor is on
approximately 1 second after engine is
started)System voltage
41Output to front-right hydraulic
unit solenoid valve (OUT side)Ignition switch: ON (When solenoid valve
is off approximately 1 second after
engine is started)System voltage
43Idle-up solenoid valve (±)Ignition switch: ON (When motor is on
approximately 1 second after engine is
started)2 V or less
45Input from free wheel engage
switch
Ignition
switch: ON
Engage 2WDSystem voltage
switchswitch: ON
Engage 4WD1 V or less
46*1Ignition switchIgnition switch: ONSystem voltage
Ignition switch: START0 V
46*2Input from rear differential
lock detection switchIgnition
switch: ONRear differential lock
switch: ON0 V
Rear differential lock
switch: OFFSystem voltage
47Input from diagnosis
indication selection
Connect the MUT-II.0 V
indication selection
Do not connect the MUT-II.Approx. 12 V
48Input from valve relay monitorIgnition switch: ONSystem voltage
49Motor monitorIgnition switch: ON
(Approximately 1 second
Motor is onSystem voltage
(A roximately 1 second
after engine is started)Motor is off0.5 V or less
50Output to ABS warning lampIgnition
switch: ON
The lamp is switched offSystem voltage
switch: ON
The lamp illuminates0 ± 2 V
52Output to front-right hydraulic
unit solenoid valve (IN side)Ignition switch: ON (When solenoid valve
is off approximately 1 second after
engine is started)System voltage
NOTE
*1: Vehicles without rear differential lock
*2: Vehicles with rear differential lock

STEERING ± Service Specifications37A-3
SERVICE SPECIFICATIONS37100030021
ItemsStandard valueLimit
Steering wheel free play mmWith engine running±50
With engine stopped10 or less±
Steering angle2WDInner wheel33
55' ± 36
55'±
Outer wheel30
57'±
4WDInner wheel29
40' ± 32
40'±
Outer wheel29
30'
Steering gear backlash mm±0.5
Variation of tie rod end ball joint shaft direction mm±1.5
Tie rod end ball joint starting torque Nm3.0±
Steering gear oil level mm22±
Engine idle speed r/min4G6750 + 100±
4D56750 + 100±
Stationary steering effort N39.2 or less±
Oil pump
p
ressure MPa
Oil pump relief pressure8.3 ± 9.0±
ressure MPa
Pressure under no-load conditions0.8 ± 1.0±
Steering gear retention hydraulic pressure8.3 ± 9.0±
Oil pressure switch operating pressure MPaOFF
ON1.5 ± 2.0±
ON
OFF0.7 ± 1.2±
Mainshaft starting torque Nm0.49 ± 0.78±
Cross-shaft axial play mm0.05 or less±
Mainshaft total starting torque Nm<2WD>0.98 ± 1.47±
<4WD>0.69 ± 1.28±
Pitman arm ball joint starting torque Nm0.5 ± 1.5±
Mainshaft axial play mm0.03 or less±
Backlash between ball groove of rack piston and balls mm±0.05
Idler arm sliding resistance N2WD8.8 ± 30±
4WD2.4 ± 16±

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

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.