Mitsubishi 380. Manual — part 965
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-85
GROUND RESISTANCE AND CONTINUITY
BETWEEN HARNESS-SIDE CONNECTOR
TERMINALS AND BODY GROUND
Required Special Tool:
MB991219: Inspection Test Harness
1. Turn the ignition switch to the "LOCK" (OFF) position and
disconnect the ABS-ECU connectors before checking
resistance and continuity.
2. Using the Inspection Test Harness (MB991219) to probe the
wiring harness-side connector, check the resistance and
continuity between the terminals indicated in the table
below.
3. The terminal layout is shown in the illustration.
NOTE: If the ABS-8 ECU or the active wheel speed sensor are
disconnected, or if the wiring is an open/ short circuit, the ABS
8 ECU will shut off power supply to the respective wheel speed
sensor. All other wheel speed sensors will operate normally. To
restore the power supply, the ignition switch must be turned to
the "OFF" position then to the "ON" position again.
35DB098A
CONNECTOR: A-02
HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)
TEST
HARNESS
(MB991219)
CONNECTOR TERMINAL NO.
SIGNAL
NORMAL CONDITION
1
− body ground
Ground
Less than 2 ohms
4
− body ground
Ground
Less than 2 ohms
SPECIAL TOOLS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-86
SPECIAL TOOLS
M1352000600653
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 Adapter Harness
G: MUT-III Trigger Harness
MB991824
−KIT
NOTE: G: MB991826
MUT-III Trigger
Harness is not
necessary when
pushing V.C.I. ENTER
key.
Checking diagnostic
trouble codes
CAUTION
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.
MB991910
MB991826
MB991958
MB991911
MB991914
MB991824
MB991827
MB991825
DO NOT USE
A
B
C
D
E
F
G
DO NOT USE
SPECIAL TOOLS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-87
MB991223
Harness set
(A): MB991219
Inspection harness
(B): MB991222
Back probing tool
General service tools
(A): Resistance
measurement between
ABS-ECU and wheel
speed sensors
ABS-ECU terminal
voltage measurement
ABS-ECU terminal
(ground) resistance
measurement
(B): ABS-ECU wheel
speed sensor signal
voltage measurement
ABS-ECU wheel speed
sensor signal
measurement
TOOL
TOOL NUMBER AND NAME SUPERSESSION
APPLICATION
MB991222
A
B
ON-VEHICLE SERVICE
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-88
ON-VEHICLE SERVICE
WHEEL SPEED SENSOR SIGNAL
MEASUREMENT
M1352001600667
Required Special Tool:
MB991222: Back probing tool
1. ABS connector (A-02) must remain connected to hydraulic
unit when checking signal measurements.
2. Remove ABS connector protection cap to access terminal
location from rear of connector for backprobing.
3. Release the parking brake and lift up the vehicle.
4. Use probe tool MB991222 to measure the output signal at
the ABS connector A-02 by back probing the terminal
positions shown in the table below.
NOTE: To check wheel speed sensor connectors, remove
the rear seat to access the rear wheel speed sensor connec-
tions and remove inner guard (splash shield) to access front
wheel speed sensors, to confirm the connection of the sen-
sor harness and connector before using the oscilloscope.
5. Connect oscilloscope (as per figure 2) shows, to the
appropriate terminal positions by back probing (using probe
MB991222) and check sensor operation individually with
scope.
Turn the ignition switch to the "ON" position.
TERMINAL NO.
Front left
Front right
Rear left
Rear right
5
10
17
19
OSCILLOSCOPE
ABS-ECU
(A-02)
Supply
Signal
WHEEL SPEED
SENSOR
Wheel speed sensor connectors:
A-04, A-01, D-30, D-31
Terminals:
5, 10, 17, 19
FIGURE 2
Red
Black
Ground
35DB122A
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