1997 MITSUBISHI TRITON service

9
TROUBLESHOOTING35201110501
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.
Phenomenon Explanation of phenomenon
System check sound When starting the engine, a thudding sound can sometimes be hear
coming from inside the engine compartment, but this is because the
system operation check is being performed, and is not an abnormality.
ABS operation sound 1.
Sound of the motor inside the ABS hydraulic unit operation (whine).
2.
Sound is 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 suck as snow-covered roads a 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 suck roads by lowering the vehicle speed and not being to
overconfident.
Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the “Comment” are satisfied when checking the trouble
symptom again.
DIAGNOSIS FUNCTION35201120351
DIAGNOSIS CODES CHECK
Read a diagnosis code by the MUT-II or ABS warning
lamp. (Refer to GROUP 00 - How to Use Trouble-
shooting/Inspection Service Points.)
ERASING DIAGNOSIS CODES
With the MUT-II
Refer to GROUP 00 – How to Use
Troubleshooting/Inspection Service Points

When diagnostic trouble codes (Nos. 21 to 24) (for vehicle wheel speed sensor system failures) occur,
normal MUT-II operation may not erase those codes. In that case, erase the diagnostic trouble codes
using the following procedures.
1.
Perform erasing of the diagnostic trouble codes by special operation of the brake pedal. (See erasing
procedure for the diagnostic trouble codes without use of the MUT-II.)
2.
Turn the ignition switch OFF.
3.
Perform erasing of the diagnostic trouble codes by use of the MUT-II.
ABS <4WD> - Troubleshooting35B-4
><

11
TROUBLESHOOTING35201110143
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.
Phenomenon Explanation of phenomenon
System check sound When starting the engine, a thudding sound can sometimes be hear
coming from inside the engine compartment, but this is because the
system operation check is being performed, and is not an abnormality.
ABS operation sound 1.
Sound of the motor inside the ABS hydraulic unit operation (whine).
2.
Sound is 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 suck as snow-covered roads an 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 suck roads by lowering the vehicle speed and not being to
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 (initial check at
a vehicle speed of 8 km/h), and does not indicate any malfunction.
Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the “Comment” 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.
See next page
ABS <2WD> - Troubleshooting35B-5

5
TEST 2 SRS WARNING LAMP DOES NOT ILLUMINATE
(1) Read (and write down) all of the displayed diagnosis codes
and service data (fault duration and how many times
memories are erased) using the Multi- use Tester
or MUT-II models>
NOTE
(1) if the Multi-use Tester or Mut-II displays “CAN’T
COMM”. check the Multi-use Tester or MUT-II and
vehicle side diagnosis connector for poor connections
(Refer to P.52B-12.) and perform TEST 4.
(2) Maximum stored period: 9999 minutes (approximately
7 days)
(3) Maximum number of times to be stored: 250
(4) Check diagnosis codes against SELF-DIAGNOSIS QUICK
REFERENCE CHART and perform service indicated there.
SELF-DIAGNOSIS QUICK REFERENCE CHART
After carrying out test 1 or 2, use the following table to repair.
Diagnosis
code No.Explanation Service
- Normal. The SRS is in good order -
11The circuits for the front impact sensor are shorted together, the (-) side of
the harness between the air bag module and the SDU is shorted to the
earth, or the (+) side of the harness between the front impact sensor and
the SDU is shorted to the earthPerform TEST 5 without front passenger’s
air bag> L.H. drive vehicles
refer to P 52B-22
12Right or left impact sensor circuit is open, or the wire from the sensor to the
SDU is open-circuit.R.H. drive vehicles: refer to
P. 52B-26 13Right and left impact sensor circuits are open or the wires from the sensors
to the SDU are open-circuitFront passenger’s air bag>
refer to P.52B-32
21The circuits for the driver’s side air bag module (squib) are shorted together
other or the circuit is earthed.Perform TEST 6 without front passenger’s
air
22The driver’s side air bag module (squib) circuit is open or the wire from the
driver’s side air bag module to the SDU (clock spring) is open circuit, the
harness connection is defective, or the (+) side of the harness between the
driver’s side air bag module and the SDU is shorted to the earth.
Disconnected connector in driver’s side air bag module (squib).
Open-circuit in clock spring due to inappropriate neutral position.bag> L.H. drive vehicles:
refer to P52B-35 R.H. drive
vehicles refer to P.52B-39
passenger’s air bag>: refer
to P.52B-45
24The circuits for the front passenger’s side air bag module (squib) are
shorted together other or the circuit is earthed.Perform TEST 13
(Refer to P.52B-64)
25The front passenger’s side air bag module (squib) circuit is open or the wire
from the front passenger’s side air bag module to the SDU (clock spring) is
open circuit, the harness connection is defective or the (+) side of the
harness between the front passenger’s side air bag module and the SDU is
shorted to the earth.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting52B-14

6
TEST 2 SRS WARNING LAMP DOES NOT ILLUMINATE
(1) Read (and write down) all of the displayed diagnosis codes
and service data (fault duration and how many times
memories are erased) using the Multi-use Tester <1993
models> or MUT-II
NOTE
(1) if the Multi-use Tester or Mut-II displays “CAN’T
COMM”. check the Multi-use Tester or MUT-II and
vehicle side diagnosis connector for poor connections
(Refer to P.52B-10.) and perform TEST 4.
(2) Maximum stored period: 9999 minutes (approximately
7 days)
(3) Maximum number of times to be stored: 250
(4) Check diagnosis codes against SELF-DIAGNOSIS QUICK
REFERENCE CHART and perform service indicated there.
SELF-DIAGNOSIS QUICK REFERENCE CHART
After carrying out test 1 or 2, use the following table to repair.
Diagnosis
code No.Explanation Service
- Normal. The SRS is in good order -
11 The circuits for the front impact sensor are shorted together, the (-) side of
the harness between the air bag module and the SDU is shorted to the
earth, or the (+) side of the harness between the front impact sensor and
the SDU is shorted to the earthPerform TEST 5 without front passenger’s
air bag> refer to P 52B-20
12 Right or left impact sensor circuit is open, or the wire from the sensor to the
SDU is open-circuit.passenger’s air bag>
refer to P.52B-24
13 Right and left impact sensor circuits are open or the wires from the sensors
to the SDU are open-circuit
21 The circuits for the driver’s side air bag module (squib) are shorted together
other or the circuit is earthed.Perform TEST 6 without front passenger’s
air
22 The driver’s side air bag module (squib) circuit is open or the wire from the
driver’s side air bag module to the SDU (clock spring) is open circuit, the
harness connection is defective, or the (+) side of the harness between the
driver’s side air bag module and the SDU is shorted to the earth.
Disconnected connector in driver’s side air bag module (squib).
Open-circuit in clock spring due to inappropriate neutral position.bag> refer to P52B-27
passenger’s air bag>: refer
to P.52B-31
24 The circuits for the front passenger’s side air bag module (squib) are
shorted together other or the circuit is earthed.Perform TEST 13
(Refer to P.52B-47)
25 The front passenger’s side air bag module (squib) circuit is open or the wire
from the front passenger’s side air bag module to the SDU (clock spring) is
open circuit, the harness connection is defective or the (+) side of the
harness between the front passenger’s side air bag module and the SDU is
shorted to the earth.
52B-12SUPPLEMENT RESTRAINT SYSTEM (SRS) - Troubleshooting

14
TEST 2 SRS WARNING LAMP DOES NOT ILLUMINATE
(1) Read (and write down) all of the displayed diagnosis codes
and service data (fault duration and how many times
memories are erased) using the MUT or MUT-II
NOTE
(1) if the MUT or MUT-II displays “CAN’T COMM”. check
the MUT or MUT-II and vehicle side diagnosis
connector for poor connections (Refer to P.52B-7.) and
perform TEST 6.
(2) Maximum stored period: 9999 minutes (approximately
7 days)
(3) Maximum number of times to be stored: 250
(4) Check diagnosis codes against SELF-DIAGNOSIS QUICK
REFERENCE CHART and perform service indicated there.
SELF-DIAGNOSIS QUICK REFERENCE CHART
After carrying out test 2 or 3, use the following table to repair.
Diagnosis
code No.Explanation Service
- Normal. The SRS is in good order -
14 Analog G sensor output signal is abnormal
Analog G sensor does not function or its characteristic is abnormalReplace the SDU
(Refer to P.52B-34.)
15 The circuits for the safing impact sensor are shorted together or the circuit
is earthed
16 The safing input sensor circuit is open or the wire from the air module to the
SDU is open circuit
21 The circuits for the air bag module (squib) are shorted together other or the
circuit is earthed.Perform TEST 7
22 The air bag module (squib) circuit is open or the wire from the air bag
module to the SDU (clock spring) is open circuit, the harness connection is
defective, or the (+) side of the harness between the air bag module and
the SDU is shorted to the earth.
Disconnected connector in driver’s side air bag module (squib).
Open-circuit in clock spring due to inappropriate neutral position.
31 The DC/DC converter (integrated in the SDU) terminal voltage is higher
than the specified value for 5 seconds.Replace the SDU
(Refer to P.52B-34.)
52B-9SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - Troubleshooting

2
SERIVICE SPECIFICATIONS
ItemsStandard value Limit
With engine running - 50Steering W heel free play mm
With engine stopped 10 or less -
Inner wheel 33°55’-36°55’ -2W D
Outer wheel 30°57’ -
Inner wheel 29°40’-32°40’ -
Steering angle
4W D
Outer wheel 29°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 Nm 3.0 -
Steering gear oil level mm 22 -
4G6 750 ± 100 -Engine idle speed r/min
4D56 750 ± 100 -
Stationairy steering effort N 39.2 or less -
Oil pump relief pressure 8.3 - 9.0 -
Pressure under no-load conditions 0.8 - 1.0 -
Oil pump
pressure MPa
Steering gear retention hydraulic pressure 8.3 - 9.0 -
OFF →
ON 1.5 – 2.0 -Oil pressure switch operating pressure Mpa
ON →
OFF 0.7 – 1.2 -
Mainshaft starting torque Nm 0.49 – 0.78 -
Cross-shaft axial play mm 0.05 or less -
<2WD> 0.98 – 1.47 -Mainshaft total starting torque Nm
<4WD> 0.69 – 1.28 -
Pitman arm ball joint starting torque Nm 0.5 – 1.5 -
Mainshaft axial play mm 0.03 or less -
Backlash between ball groove of rack piston and balls mm - 0.05
2WD 8.8 – 30 -Idler arm sliding resistance N
4WD 2.4 – 16 -
STEERING – Service Specifications37A-3
37100030021

4
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION
DIAGNOSIS CODE 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 CODES
Inspect according to the inspection chart that is appropriate for the malfunction code.
Code No. Diagnosis ItemReference Page
14 Analog G-sensor system in the SRS-ECU 52B-6
15, 16 Front impact safing G sensor system inside SRS-ECU 52B-6
17 Side impact safing G sensor system inside SRS-ECU 52B-6
21, 22, 61, 62 Driver’s side air bag module (squib) system 52B-7
24, 25, 64, 65 Front passenger’s side air bag module (squib) system 52B-8
31, 32 SRS-ECU capacitor system 52B-8
34* Connector lock system 52B-9
35 SRS-ECU (deployed air bag) system 52B-9
41* IG1 (A) power circuit system 52B-9
42* IG1 (B) power circuit system 52B-9
Lamp does not illuminate.* 52B-1043 SRS warning lamp driver circuit system
Lamp does not switch off. 52B-10
44* SRS warning lamp drive circuit system 52B-10
45 Internal circuit system of non-volatile memory (EEPROM) inside SRS-ECU 52B-11
51, 52 Driver’s side air bag module (squib ignition drive circuit) system 52B-11
54, 55 Front passenger’s side air bag module (squib ignition drive circuit) system 52B-11
71, 72, 75, 76 Side air bag module (R.H.) (squib) system 52B-11
73, 74 Side air bag module (R.H.) (squib) ignition drive circuit system 52B-12
79, 93 Side air bag module (L.H.) communication system 52B-12
81, 82, 85, 86 Side air bag module (L.H.) (squib) system 52B-12
83, 84 Side air bag module (L.H.) (squib) ignition drive circuit system 52B-13
SRS - Troubleshooting52B-5
WHEN USING THE MUT-II
Connect the MUT-II to the diagnosis connector and erase the diagnosis code.
Caution
Turn off the ignition switch before connecting or disconnecting the MUT-II.

8
SEALANT
Item Specified sealant Remark
Sensor cable 3M ATD Part No. 8625 or equivalent Ribbon sealer
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION
DIAGNOSIS CODE 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 CODES
Inspect according to the inspection chart that is appropriate for the malfunction code.
Code No. Diagnosis ItemReference Page
11, 12, 13 Front impact sensor system 52B-7
21, 22 Air bag module (squib) system 52B-8
31, 32 SDU capacitor system 52B-9
33* Cranking signal system 52B-10
34* Connector lock system 52B-11
41* IG1 (A) power circuit system 52B-11
42* IG1 (B) power circuit system 52B-12
43 SRS warning lamp drive circuit system
Lamp does not illuminate*52B-13
SRS warning lamp drive circuit system
Lamp does not switch off52B-14
44 SRS warning lamp drive circuit system 52B-14
45 SDU non-volatile memory (EEPROM) and A/D converter system 52B-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 vehicel has a discharged battery it will store the fault codes 41 or 42. When these diagnosis codes are displayed, check
the battery.
52B-6SRS – Sealant/Troubleshooting
52400060015

WHEN USING THE MUT-II
Connect the MUT-II to the diagnosis connector and erase the diagnosis code.
Caution
Turn off the ignition switch before connecting or disconnecting the MUT-II.

52400310097
52400320063
52400330123