warning MITSUBISHI TRITON 1997 User Guide

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-17
Inspection Procedure 5
When ignition key is turned to ºSTARTº, ABS warning
lamp does not illuminate.
Probable cause
Current does not flow in the ABS-ECU when the ignition switch is turned to START.
Current flows in the ABS warning lamp even when the ignition switch is turned to
START. Therefore, the valve relay, which current is supplied through the ABS-ECU,
turns off when the ignition switch is at START. However, the warning lamp circuit
of the valve relay must turn on in turn. So the cause must be a defective circuit
on valve relay side.
Malfunction of wiring harness or connector

Malfunction of ABS-ECU
ABS valve relay check (Refer to
P.35B-28.)NGReplace the ABS valve relay.
OK

Disconnect valve relay connector
A-39.

Disconnect ABS-ECU connector
C-64.

Ignition switch: ON

Voltage between valve relay
harness-side connector terminal (3)
and body earth
OK:System voltageNGCheck the following connector and
diode.
C-02 and C-05NG
Repair
OK
Check trouble symptoms.NGCheck the harness between the com-
bination meter and valve relay, and re-
pair if necessary.
OK
Check the following connector.
A-39NG
Repair
OK
Check trouble symptoms.NGCheck the harness between the valve
relay and earth, and repair if necessary.
Inspection Procedure 6
The ABS warning lamp flashes twice after the ignition key
is turned to ºONº. The lamp illuminates when the ignition
key is turned to ºSTARTº, and when the key is returned to
ºONº, it flashes once.
Probable cause
The ABS-ECU causes the ABS warning lamp to illuminate during the initial check
(approx. 3 seconds). During the initial check, the valve relay turns from off to on,
off and back to on again. If there is an open circuit in the harness between the ABS-ECU
and the ABS warning lamp, the lamp will illuminate only when the valve relay is OFF
during valve relay test, etc.
Malfunction of wiring harness or connector

Malfunction of ABS-ECU

Disconnect valve relay connector
A-39.

Disconnect ABS-ECU connector
C-64.

Ignition switch: ON

Voltage between ABS-ECU har-
ness-side connector terminal (50)
and body earth
OK:System voltageNGCheck the following connector.
C-02NG
Repair
OK
Check trouble symptom.NGCheck the harness between the com-
bination meter and the ABS-ECU, and
repair if necessary.
OK
Check the following connector.
C-64NG
Repair
OK
Check trouble symptom.NGReplace the ABS-ECU.

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-10
Code No. 32 G-sensor systemProbable cause
This code is output at the following times:
The G-sensor output is less than 0.5 V or more than 4.5 V.
An open or short circuit is present in the G-sensor system.
Malfunction of G-sensor

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
G-sensor check (Refer to P. 35C-20.)NGReplace the G-sensor.
OK
Measure at ABS-ECU connector C-62.

Ignition switch ON

Voltage between 4 and 17
OK:2.4 ± 2.6 VNGCheck the following connector.
C-02NG
Repair
OK
Check trouble symptom.NGCheck the harness between the G-sen-
sor and the ABS-ECU, and repair if nec-
essary.OK
Check the following connector.
C-62NG
Repair
OK
Check trouble symptom.
NG
Replace the ABS-ECU.
ABS WARNING LAMP INSPECTION35201200086
Refer to GROUP 35B ± Troubleshooting.
INSPECTION CHART FOR TROUBLE SYMPTOMS35201140159
Refer to GROUP 35B ± Troubleshooting.

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

52A-2
INTERIOR
CONTENTS52109000255
SERVICE SPECIFICATIONS 3. . . . . . . . . . . . . . . . .
ADHESIVE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTRUMENT PANEL* 4. . . . . . . . . . . . . . . . . . . . . .
FLOOR CONSOLE 7. . . . . . . . . . . . . . . . . . . . . . . . . TRIMS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SEAT 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REAR SEAT 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SEAT BELT 18. . . . . . . . . . . . . . . . . . . . . . .
REAR SEAT BELT 19. . . . . . . . . . . . . . . . . . . . . . . .
WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
WARNING!
(1) Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to personal
injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (from rendering the SRS
inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an authorized
MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B ± Supplemental
Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any SRS-related
component.
NOTE
The SRS includes the following components: impact sensors, SRS diagnosis unit, SRS warning lamp, air bag module, clock spring
and interconnecting wiring. Other SRS-related components (that may have to be removed/installed in connection with SRS service
or maintenance) are indicated in the table of contents by an asterisk (*).

SRS ± SRS Service Precautions52B-4
Harness
connector
(No. of termi-
nals, colour)SDU terminal No.Destination of harnessCorrective action
2 pins, red1, 2Body wiring harness
Clock springReplace clock spring
±3, 4±±
±5, 6±±
14 pins, red7, 8±±
9Body wiring harness
Diagnosis connectorCorrect or replace each
wiring harness10Body wiring harness
Front wiring harness

Ignition switch (ST)
wiring harness
11Body wiring harness
Junction block (fuse
No.11)
12Body wiring harness
Junction block (fuse
No.10)
13Body wiring harness
Combination meter (SRS
warning lamp)
14±±
15Body wiring harness
Front wiring harness

Front impact sensor (+) (R.H.)Sensor cable* installation
procedures (Refer to
P 52B 39 )16Body wiring harness
Front wiring harness

Front impact sensor (+) (L.H.)P.52B-39.)
17Body wiring harness
Front wiring harness

Front impact sensor (±) (L.H.)
18Body wiring harness
Front wiring harness

Front impact sensor (±) (R.H.)
19, 20Body wiring harness
EarthCorrect or replace each
wiring harness
NOTE
The sensor cable marked with * is available as service part.
7. SRS components should not be subjected to heat over 93
C, so remove the SRS diagnosis unit,
air bag module, clock spring and front impact sensors before drying or baking the vehicle after painting.
8. Whenever you finish servicing the SRS, check warning lamp operation to make sure that the system
functions properly. (Refer to P.52B-16.)
9. Make certain that the ignition switch is OFF when the MUT-II is connected or disconnected.
10. If you have any questions about the SRS, please contact your local distributor.
NOTE
SERIOUS INJURY CAN RESULT FROM UNINTENDED AIR BAG DEPLOYMENT, SO USE ONLY
THE PROCEDURES AND EQUIPMENT SPECIFIED IN THIS MANUAL.

SRS ± Sealant/Troubleshooting52B-6
SEALANT52400060015
ItemSpecified sealantRemark
Sensor cable3M ATD Part No. 8625 or equivalentRibbon sealer
TROUBLESHOOTING52400310097
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 ± How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION52400320083
DIAGNOSIS CODES CHECK
Connect the MUT-II to the diagnosis connector (16-pin) under the instrument under cover, then check
diagnosis codes.
(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.
INSPECTION CHART FOR DIAGNOSIS CODES52400330123
Inspect according to the inspection chart that is appropriate for the malfunction code.
Code No.Diagnosis itemReference page
11, 12, 13Front impact sensor system52B-7
21, 22Air bag module (squib) system52B-8
31, 32SDU capacitor system52B-9
33*Cranking signal system52B-10
34*Connector lock system52B-11
41*IG1 (A) power circuit system52B-11
42*IG1 (B) power circuit system52B-12
43SRS warning lamp drive circuit system
Lamp does not illuminate*52B-13
SRS warning lamp drive circuit system
Lamp does not switch off52B-14
44SRS warning lamp drive circuit system52B-14
45SDU non-volatile memory (EEPROM) and A/D converter system52B-14
NOTE
(1) *: If the vehicle condition returns to normal, the diagnosis code will be automatically erased, and the SRS warning
lamp will return to normal.
(2) If the vehicle has a discharged battery it will store the fault codes 41 or 42. When these diagnosis codes are displayed,
check the battery.