Mitsubishi Montero (2004+). Manual — part 977
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
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STEP 1. Using scan tool MB991958, read the transfer
diagnostic trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for transfer diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 34 set?
YES : Refer to
, DTC 34: Free-wheel Engage
Solenoid Valve System.
NO : Go to Step 2.
STEP 2. Using scan tool MB991958, check data list item 38:
Free-wheel Engage Switch.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Transmission range should be "N" range.
(4) See scan tool MB991958 to data reading mode.
• Item 38: Free-wheel Engage Switch.
• When the transfer shift lever position is other than
2H, the display should be "ON."
• When the transfer shift lever position is 2H, the dis-
play should be "OFF."
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
.
NO : Go to Step 3.
AC307591 AC
MB991911
MB991824
MB991827
AC307591
DATA LINK
CONNECTOR
AC307591 AC
MB991911
MB991824
MB991827
AC307591
DATA LINK
CONNECTOR
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
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STEP 3. Using scan tool MB991958, check the free-wheel
engage switch circuit.
(1) Remove the free-wheel engage switch.
(2) Do not disconnect connector B-39.
(3) Connect scan tool MB991958 to the data link connector.
(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to data reading mode for item 38,
Free-wheel Engage Switch.
• When the free-wheel engage switch is released (OFF),
the display should be "OFF."
• When the free-wheel engage switch is pressed (ON),
the display should be "ON."
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : Go to Step 4.
NO : Go to Step 5.
STEP 4. Check the free-wheel engage solenoid valve.
Refer to GROUP 26, On-vehicle Service
− Solenoid Valve
Operation Check
Q: Is the solenoid valve normal?
YES : Repair or replace the actuator assembly and
free-wheel engage clutch. Refer to GROUP 26,
Differential Carrier and Free-wheel Clutch
NO : Repair or replace the free-wheel engage solenoid
valve and vacuum hoses. Refer to GROUP 26,
Solenoid Valve and Vacuum Hose
ACX02209 AC
FREE-WHEEL
ENGAGE SWITCH
ACX01539AD
MB991502
16 PIN
AC000801AC
FREE-WHEEL
ENGAGE SWITCH
B-39 HARNESS
CONNECTOR
OFF
ON
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
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STEP 5. Check the free-wheel engage switch.
Refer to GROUP 26, Differential Carrier and Free-wheel Clutch
.
Q: Is the switch operating properly?
YES : Go to Step 6.
NO : Replace the free-wheel engage switch. Refer to
GROUP 26, Differential Carrier and Free-wheel
Clutch
STEP 6. Measure the power supply voltage at freewheel
engage switch B-39.
(1) Disconnect connector B-39 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.
• The voltage should measure 10.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 10.5 volts?
YES : Go to Step 12.
NO : Go to Step 7.
AC204168
CONNECTOR : B-39
AC
B-39 (GR)
2
1
AC204918 AF
B-39 HARNESS CONNECTOR :
COMPONENT SIDE
1
2
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
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STEP 7. Measure the switch output voltage at transfer-ECU
connector E-104 by backprobing.
(1) Do not disconnect connector E-104.
(2) Turn the ignition switch to the "ON" position.
(3) Transmission range should be "N" range.
(4) Measure the voltage between terminal 50 and ground by
backprobing.
• When the transfer shift lever position is 2H, voltage
should measure 10.5 volts.
• When the transfer shift lever position is other than 2H,
voltage should measure 0 volt.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?
YES : Go to Step 10.
NO : Go to Step 8.
AC204176
CONNECTOR : E-104
BA
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
AC204918 BY
E-104 HARNESS CONNECTOR :
HARNESS SIDE
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
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