Mitsubishi Montero Sport (2004+). Manual — part 816
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>
35C-71
DATA LIST REFERENCE TABLE
M1352011500650
The following items can be read by the scan tool from the ABS-ECU input data.
1. When the system is normal.
2. When the ABS-ECU shuts off the ABS operation.
When the diagnostic trouble system stops the ABS-ECU, the scan tool display data will be unreliable.
MUT-III
SCAN TOOL
DISPLAY
ITEM
NO.
INSPECTION ITEM
INSPECTION REQUIREMENT
NORMAL VALUE
2/4WD SW 1 25
2/4WD detection switch
1
−
ON
2/4WD SW 2 26
2/4WD detection switch
2
Transfer control lever: "4L" or
"4H"
ON
Transfer control lever: "AWD"
OFF
R/D LOCK
SW
27
Rear differential lock
detection switch
−
OFF
BATT.
VOLTAGE
16
ABS-ECU power supply
voltage
Ignition switch power supply
voltage and valve monitor voltage
6.5
− 22.3 V
FL SNSR
12
Front left wheel speed
sensor
Drive the vehicle.
Vehicle speeds
displayed on the
speedometer and
scan tool are identical.
FR SNSR
11
Front right wheel speed
sensor
G SNSR
32
G-sensor output voltage When vehicle is stationary (level) 2.4
− 2.6V
When vehicle is being driven
Display value
fluctuates with a mean
value of 2.5V.
RL SNSR
14
Rear left wheel speed
sensor
Drive the vehicle.
Vehicle speeds
displayed on the
speedometer and
scan tool are identical.
RR SNSR
13
Rear right wheel speed
sensor
STOPLIGHT
SW
33
Stoplight switch
Depress the brake pedal.
ON
Release the brake pedal.
OFF
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>
35C-72
ACTUATOR TEST REFERENCE
M1352011600668
The scan tool activates the following actuators for testing.
NOTE: If the ABS-ECU is inoperative, actuator testing cannot be carried out.
Actuator testing is only possible when the vehicle is stationary. If the vehicle speed during actuator testing
exceeds 10 km/h (6 mph), forced actuation will be canceled.
ACTUATOR TEST SPECIFICATIONS
MUT-III
SCAN
TOOL
DISPLAY
NO.
ITEM
FR SOL
VALVE
01
Solenoid valve
for front-right
wheel
Solenoid valves and
pump motor in the
hydraulic unit (simple
inspection mode)
FL SOL
VALVE
02
Solenoid valve
for front-left
wheel
REAR
SOL. V.
03
Solenoid valve
for rear wheel
AC004863 AB
A
B
C
ACTIVATION PATTERN
START OF
FORCED
ACTION
END OF
FORCED
ACTION
ON
OFF
SOLENOID
VALVE
PUMP
MOTOR
NOTE
A: HYDRAULIC PRESSURE INCREASES
B: HYDRAULIC PRESSURE HOLDS
C: HYDRAULIC PRESSURE DECREASE
48 ms
1 s
3 s
8 ms
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>
35C-73
CHECK AT ABS-ECU
M1352011800639
TERMINAL VOLTAGE CHECK CHART
NOTE: Do not measure terminal voltage for approximately three seconds after the ignition switch is turned
"ON." The ABS-ECU performs the initial check during that period.
1. Measure the voltages between terminals (32) or (34) (ground terminals) and each respective terminal.
2. The terminal layouts are shown in the illustrations.
AC004864
CONNECTOR
TERMINAL
NO.
SIGNAL
CHECKING REQUIREMENT
NORMAL
CONDITION
7
G-sensor
Ignition switch: "ON"
2.38
− 2.62 V
9
ABS-ECU power
supply
Ignition switch: "ON"
Battery positive
voltage
Ignition switch: "START"
0 V
11
2/4WD switch 2
Ignition switch: "ON" Transfer control lever: "4L"
or "4H"
0 V
Transfer control lever:
"AWD"
Battery positive
voltage
12
2/4WD switch 1
Always
0 V
13
Input from stoplight
switch
Ignition switch: "ON" Stoplight switch: "ON"
Battery positive
voltage
Stoplight switch: "OFF"
1 V or less
14
G sensor
Always
0 V
16
Control output to
ABS warning light
relay
Ignition switch: "ON" The light is switch off.
2 V or less
The light is illuminated.
Battery positive
voltage
23
Scan tool
Connect the scan tool.
Serial
communication
with scan tool
Do not connect the scan tool.
1 V or less
24
Input from
diagnostic
indication selection
Connect the scan tool.
0 V
Do not connect the scan tool.
Approximately
12 V
31
Solenoid valve
power supply
Always
Battery positive
voltage
33
Motor power
supply
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <4WD>
35C-74
RESISTANCE AND CONTINUITY BETWEEN HARNESS-SIDE CONNECTOR
TERMINALS
1. Turn the ignition switch to the "LOCK" (OFF) position and disconnect the ABS-ECU connectors before
checking resistance and continuity.
2. Check between the terminals indicated in the table below.
3. The terminal layouts are shown in the illustration.
AC004865
CONNECTOR
TERMINAL NO.
SIGNAL
NORMAL CONDITION
1
− 2
Rear-right wheel speed sensor
1.3
− 1.5 kΩ
3
− 4
Rear-left wheel speed sensor
1.3
− 1.5 kΩ
18
− 19
Front-right wheel speed sensor
1.3
− 1.5 kΩ
20
− 21
Front-left wheel speed sensor
1.3
− 1.5 kΩ
32
− body ground
Solenoid valve ground
Continuity (Less than 2 ohms)
34
− body ground
Motor ground
Continuity (Less than 2 ohms)
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