1997 MITSUBISHI TRITON battery

ABS <2WD> ± Troubleshooting35B-8
Code No. 15 Wheel speed sensor (Abnormal output signal)Probable cause
A wheel speed sensor outputs an abnormal signal (other than an open or short-circuit).
Improper installation of wheel speed sensor

Malfunction of wheel speed sensor

Malfunction of rotor

Malfunction of wheel bearing

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
NG
Replace the ABS-ECU.
OK
Check trouble symptoms.
OK
Wheel bearing check. (Refer to GROUP
26 and 27 ± On-vehicle Service.)OKCheck the harness wire between each
wheel speed sensor and ABS-ECU, and
repair if necessary.
OK
Rotor check. (Refer to P.35B-40.)NGReplace the rotor.
OK
Check the following connector.
C-62NG
Repair
OK
Wheel speed sensor output voltage
check (Refer to P.35B-24.)NGWheel speed sensor check. (Refer to
P.35B-39.)NGReplace the wheel speed sensor.
Wheel speed sensor installation check.NG
Repair
Code No. 16 Power supply systemProbable cause
The voltage of the ABS-ECU power supply drops lower or rises higher than the specified
value. If the voltage returns to the specified value, this code is no longer output.
Malfunction of wiring harness or connector.

Malfunction of ABS-ECU
Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill distilled water if
necessary.
OK
Check the battery.
OK
Check trouble symptoms.NGCheck the harnes wire between the igni-
tion switch and the ABS-ECU, and repair
if necessary.
OK
Check trouble symptoms.NGReplace the ABS-ECU.
OK
Check the following connector.
C-62NG
Repair
Measure at the ABS-ECU connector
C-62.

Disconnect the connector and
measure at the harness side.

Start the engine. Voltage between
13 ± Body earth
OK:System voltageNGCheck the following connectors.
C-88, C-86 and C-02NG
Repair

ABS <2WD> ± Troubleshooting35B-12
Code No. 53 Motor relay, motorProbable cause
These codes are output at the following times:
When the motor relay is on but no signal is input to the motor monitor line (motor
is not operating, etc.)
When the motor relay is off but a signal is input to the motor monitor line for 5 seconds
or more (motor continues operating, etc.)
When the motor relay does not operate
Malfunction of motor relay

Malfunction of wiring harness or connector

Malfunction of hydraulic unit

Malfunction of ABS-ECU
Caution
Because force-driving of the motor by means of the actuator test will drain the battery, the engine
should be started and left to run for a while after testing is completed.
NG
Repair
MUT-II Actuator test
Is the sound of the motor operating
heard for items 01 ± 03 only?Ye sCheck the harness between the hydrau-
lic unit and ABS-ECU, and repair if nec-
essary.
No
ABS motor relay check. (Refer to
P.35B-28.)NGReplace the motor relay.
OK
Measure at motor relay connector A-38.

Disconnect the connector and
measure at the harness side.

Voltage between 5 ± body earth
OK:System voltageNGCheck the harness between fusible link
No. 11 and ABS motor relay, and repair
if necessary.
OK
Measure at ABS-ECU connectors C-62
and C-64.

Disconnect the connector and
measure at the harness side.

Resistance between 26 ± 38
OK:72 ± 88 WNGCheck the following connector.
A-38
OK
Check trouble symptoms.NGCheck the harnesses between motor
relay and ABS-ECU, and repair if
necessary.
OK
Measure at ABS-ECU connector C-64.

Disconnect the connector and
measure at the harness side.

Continuity between 49 ± body earth
OK:ContinuityNGCheck the harness between the
hydraulic unit and ABS-ECU, and repair
if necessary. Motor earth, repair if
necessary.
OK
Motor operation check. (Refer to
P.35B-27.)NGReplace the hydraulic unit.
OK
Check the following connector.
C-64NG
Repair
OK
Check trouble symptoms.NGReplace the ABS-ECU.

35C-2
For the items below, refer to GROUP
35A.
SEALANTS
ON-VEHICLE SERVICE
Brake Pedal Check and Adjustment
Stop Lamp Switch Inspection
Brake Booster Operating Test
Check Valve Operation Check
Brake Booster Vacuum Switch Check
Load Sensing Spring Length Check and
Adjustment
Load Sensing Proportioning Valve Function
Test
Front Disc Brake Rotor Check
Brake Lining Thickness Check
Brake Drum Inside Diameter Check
Brake Lining and Brake Drum Connection
Check
BRAKE PEDAL
LOAD SENSING PROPORTIONING VALVE
REAR DRUM BRAKE
For the items below, refer to GROUP
35B.
ON-VEHICLE SERVICE
Bleeding
Disc Brake Pad Check and Replacement
Wheel Speed Sensor Output Voltage Check
Hydraulic Unit Check
Solenoid Valve Check
Motor Operation Check
Motor Relay and Valve Relay Continuity Check
Remedy for a Flat Battery
MASTER CYLINDER AND BRAKE
BOOSTER
HYDRAULIC UNIT
ABS-ECU

ABS <4WD> ± Troubleshooting35C-9
Code No. 27 Rear differential lock detection switch
Probable cause
The ABS-ECU determines that an open circuit occurs in rear differential detection
switch system.
Malfunction of wiring harness or connector

Malfunction of rear differential lock-ECU

Malfunction of ABS-ECU
Does the 4WD indicator lamp (rear dif-
ferential lamp) operate normally?NoRear differential lock-ECU check.NGReplace the rear differential lock-ECU.
Ye s
Measure at the ABS-ECU connector
C-64.

Disconnect the connector and
measure at the harness side.

Ignition switch: ON

Rear differential lock switch: OFF

Voltage between 46 and body earth
OK:System voltageNGCheck the following connectors.
C-88, C-86, C-02 and C-64NG
Repair
OK
Check trouble symptom.NGCheck the harness between rear differ-
ential detection switch and the ABS-
ECU, and repair if necessary.
OK
Check the following connector.
C-64NG
Repair
OK
Check trouble symptoms.NGReplace the ABS-ECU.
Code No. 27 Rear differential lock detection switch
Probable cause
For vehicles without rear differential lock, battery positive voltage is applied to the
ABS-ECU terminal No. 46.
This code is output when this line is interrupted.
Malfunction of wiring harness or connector

Malfunction of ABS-ECU
Is the fuse No. 7 normal?NoReplace the fuse after eliminating the
cause of the blowout.
Ye s
Measure at the ABS-ECU connector
C-64.

Disconnect the connector and
measure at the harness side.

Ignition switch ON

Voltage between 46 and body earth
OK:System voltageNGCheck the following connectors.
C-88, C-86, C-02 and C-64NG
Repair
OK
Check trouble symptoms.NGCheck the harness between fuse No.
7 inside the junction block and the ABS-
ECU, and repair if necessary.
OK
Check the following connector.
C-64NG
Repair
OK
Check trouble symptoms.NGReplace the ABS-ECU.

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.

SRS ± Post-collision Diagnosis52B-19
POST-COLLISION DIAGNOSIS52400110154
To inspect and service the SRS after a collision (whether
or not the air bag has deployed), perform the following steps.
SRS DIAGNOSIS UNIT MEMORY CHECK
1. Connect the MUT-II to the diagnosis connector (16-pin).
Caution
Turn off the ignition switch before connecting or
disconnecting the MUT-II.
2. Read (and write down) all displayed diagnosis codes.
(Refer to P. 52B-6.)
NOTE
If the battery power supply has been disconnected or
disrupted by the collision, the MUT-II cannot communicate
with the SRS diagnosis unit. Inspect and, if necessary,
repair the body wiring harness before proceeding further.
3. Read the data list (fault duration and how many times
memories are erased) using the MUT-II.
Data list
No.Service Data ItemApplicability
91How long a problem has lastedMaximum time to be stored: 9999 minutes
(approximately 7 days)
92Number indicating houw often the memory is clearedMaximum time to be stored: 250
4. Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-6.)
REPAIR PROCEDURE
WHEN AIR BAG DEPLOYS IN A COLLISION.
1. Replace the following parts with new ones.

SRS diagnosis unit (SDU) (Refer to P. 52B-26.)

Air bag module (Refer to P. 52B-28.)

Front impact sensors (Refer to P. 52B-23.)

SRS ± SRS Diagnosis Unit (SDU)/Air Bag Module and Clock Spring52B-28
INSPECTION52400220093

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 MODULE AND CLOCK SPRING52400240143
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, No.4.)
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 93C.
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-34.)

CHASSIS ELECTRICAL ± Battery54-5
CHARGING54100110029
1. When charging a battery while still installed in the vehicle,
disconnect the battery cables to prevent damage to
electrical parts.
2. The current normally used for charging a battery should
be approximately 1/10th of the battery capacity.
3. When performing a quick-charging due to lack of time,
etc., the charging current should never exceed the battery
capacity as indicated in amperes.
4. Determining if charging is completed.
(1) If the specific gravity of the battery fluid reaches
1.250 ± 1.290 and remains constant for at least one
hour.
(2) If the voltage of each cell reaches 2.5 ± 2.8 V and
remains constant for at least one hour.
Caution
1. Be careful since the battery fluid level may rise
during charging.
2. Keep all sources of fire away while charging
because there is a danger of explosion.
3. Be careful not to do anything that could generate
sparks while charging.
4. When charging is completed, replace the battery
caps, pour clean water over the battery to remove
any sulfuric acid and dry.