2005 MITSUBISHI 380 Workshop Manual

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS
TRACTION CONTROL SYSTEM (TCL)13C-42
Connect oscilloscope to FL sensor signal terminal (16)
at ABS-ECU (A-02)
Connect oscilloscope to FR sensor signal terminal (9) at
ABS-ECU (A-02)
Connect oscilloscope to RL sensor signal terminal (6) at
ABS-ECU (A-02)
Connect oscilloscope to RR sensor signal terminal (8) at
ABS-ECU (A-02)
(6) Turn the ignition switch to the "ON" position.

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS
TRACTION CONTROL SYSTEM (TCL)13C-43
(7) The recommended Supply Voltage at terminals 16, 9, 6,
and 8 are:
Set value: 10.0Volts - 14.5Volts
Q: Is the supply voltage within the set value?
YES : Check wheel speed sensor signal at ABS-ECU using
an oscillopscope
NO :
Refer to Power supply systemP.35B-63
Refer to Motor supply systemP.35B-48
Refer to Valve relay systemP.35B-56
Measure wheel speed sensor signals using an
oscilloscope.
NOTE: To check connections of the wheel speed sensors,
remove the rear seat to access the rear wheel speed sen-
sor connectors, and remove inner front guard (splash
shield) to access the front wheel speed sensors.
(1) Wheel speed sensor must remain connected to measure
active sensor.
(2) ABS-ECU must remain connected.
(3) Remove ABS connector protection cap to access terminal
location from the rear of connector for back-probing.
(4) Using probe (MB991222), backprobe the wheel speed
sensor signal circuit terminals (5, 10, 17, 19), and check
individually at the ABS-ECU connector A-02
(5) The wheel to be tested must be free to turn by hand or be
driven by brake dynamometer
(6) Connect oscilloscope (as per figure 2) shows, to the
appropriate terminal positions and check sensor operation
individually with scope.

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS
TRACTION CONTROL SYSTEM (TCL)13C-44
Connect oscilloscope to FL sensor signal terminal (5) at
ABS-ECU (A-02)
Connect oscilloscope to FR sensor signal terminal (10)
at ABS-ECU (A-02)
Connect oscilloscope to RL sensor signal terminal (17)
at ABS-ECU (A-02)
Connect oscilloscope to RR sensor signal terminal (19)
at ABS-ECU (A-02)
(7) Recommended Oscilloscope setting:
Y-axis: 2Volts
X-axis: 100ms
(8) Turn the ignition switch to the "ON" position.
(9) Turn wheel by hand at approximately 1 revolution per
second (r/sec) or drive on brake dynamometer at 5km/h.
The measurement reading of the active wheel speed sen-
sors on the oscilloscope should correspond to figure 3
below.
NOTE: If the oscilloscope signal shape is correct and wheel
sensor air gap is within specification, but the voltage values are
either higher or lower as shown in the table below, the wheel
speed sensor must be changed.

SPECIAL TOOLS
TRACTION CONTROL SYSTEM (TCL)13C-45
SPECIAL TOOLSM1136000600024
TOOL TOOL NUMBER AND NAME SUPERSESSION APPLICATION
MB991958
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826
MUT-III sub assembly
A: Vehicle communication
interface (V.C.I.)
B: MUT-III USB cable
C: MUT-III main harness A
(Vehicles with CAN
communication system)
D: MUT-III main harness B
(Vehicles without CAN
communication system)
E: MUT-III main harness C
(for Daimler Chrysler
models only)
F: MUT-III measurement
adapter
G: MUT-III trigger harnessMB991824-KIT
NOTE: G: MB991826
MUT-III trigger
harness is not
necessary when
pushing V.C.I. ENTER
key.Checking diagnostic
trouble codes
For vehicles with CAN
communication, use
MUT-III main harness A
to send simulated
vehicle speed. If you
connect MUT-III main
harness B instead, the
CAN communication
does not function
correctly.

SPECIAL TOOLS
TRACTION CONTROL SYSTEM (TCL)13C-46
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Inspection harness
B: LED harness
C: LED harness adapter
D: ProbeGeneral service tools Checking the continuity
and measuring the
voltage at the harness
connector TOOL TOOL NUMBER AND NAME SUPERSESSION APPLICATION

ON-VEHICLE SERVICE
TRACTION CONTROL SYSTEM (TCL)13C-47
ON-VEHICLE SERVICE
TCL INDICATOR LIGHT CHECKM1136000900058
1. Check that the "TCL OFF" indicator light and the TCL work
indicator light illuminate for three seconds when the ignition
switch is turned to the "ON" position.
2. Check that the "TCL OFF" indicator light illuminates and
goes off in cycles each time the TCL switch is pushed after
starting the engine.
3. Check that the "TCL OFF" indicator light and the TCL work
indicator light do not illuminate, when driving at 30km/h
(37.5 mph) for more than 2 seconds.
4. If defective, repair it. (Refer to P.13C-23, TCL diagnosis

Symptom Procedures
Inspection Procedure 1, 2, 3 and 4).
TCL OPERATION CHECKM1136001100055
Required Special Tools:
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: V.C.I.
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A

ON-VEHICLE SERVICE
TRACTION CONTROL SYSTEM (TCL)13C-48
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
1. Connect diagnostic tool MB991958 to the data link
connector. (Refer to P.13C-3).
2. Turn the ignition switch to the "ON" position.
The engine speed increases after the actuator test
because the actuator test continues for only three sec-
onds. Therefore, release the accelerator pedal immedi-
ately.
3. Use diagnostic tool MB991958 to check the actuator test.
(Refer to P.13C-3).
Item 09: Engine TCL Drive.
When the accelerator pedal is depressed at the same
time that the button for actuator test item 09 displayed
on diagnostic tool MB991958 is pressed, the system
prevents the engine speed from rising for three sec-
onds.
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect diagnostic tool MB991958.
6. If defective, repair it. (Refer to P.13C-34, TCL diagnosis

Symptom Procedures
Inspection Procedure 6).
TCL SWITCH CHECKM1136001700024
1. Remove the TCL switch. (Refer to P.13C-49).
2. Measure the resistance between terminal 1 and terminal 2
when the TCL switch is pressed or released. If the values
measured at the time correspond to those in the table below,
the resistance values are correct.
WHEEL SPEED SENSOR CHECKM1136001300026
Refer to GROUP 35B, On-vehicle Service P.35B-88.
SWITCH
POSITIONTESTER
CONNECTIONSPECIFIED
CONDITION
Pressed 1-2 Less than 2
ohms
Released 1-2 Open circuit

TCL SWITCH
TRACTION CONTROL SYSTEM (TCL)13C-49
TCL SWITCH
REMOVAL AND INSTALLATIONM1136001600027
WHEEL SPEED SENSOR
REMOVAL AND INSTALLATIONM1136002500023
Refer to GROUP 35B, Wheel Speed Sensor P.35B-95.
ABS/TCL-ECU
REMOVAL AND INSTALLATIONM1136005300017
Replace the hydraulic unit (integrated with ABS/TCL-ECU). (Refer to GROUP 35B, Hydraulic Unit P.35B-93).
REMOVAL STEPS
HOOD LOCK RELEASE HANDLE
(REFER TO GROUP 42, HOOD P.42-8.)
INSTRUMENT LOWER PANEL (REFER
TO GROUP 52A, INSTRUMENT PANEL
ASSEMBLY P.52A-4.)
INSTRUMENT PANEL GARNISH
(REFER TO GROUP 52A,
INSTRUMENT PANEL ASSEMBLY
P.52A-4.)
1. SWITCH BEZEL ASSEMBLY
2. SWITCH PANEL ASSEMBLY
3. TCL SWITCH REMOVAL STEPS (Continued)