Mitsubishi Montero (2004+). Manual — part 955

PCM TERMINAL RESISTANCE AND CONTINUITY INSPECTION CHART

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PCM TERMINAL RESISTANCE AND CONTINUITY

INSPECTION CHART

M1231109400112

INSPECTION PROCEDURE USING AN OSCILLOSCOPE

M1231109500108

ACX01978

ACX01978AC

TERMINAL NO. INSPECTION ITEM

NORMAL CONDITION (CHECK CONDITION)

57

− 124

Transmission fluid temperature
sensor

16.7

− 20.5 kΩ [at 0°C (32°F)]

7.3

− 8.9 kΩ [at 20°C (68°F)]

3.4

− 4.2 kΩ [at 40°C (104°F)]

1.9

− 2.2 kΩ [at 60°C (140°F)]

1.0

− 1.2 kΩ [at 80°C (176°F)]

0.57

− 0.69 kΩ [at 100°C (212°F)]

TERMINAL
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION
(WAVEFORM SAMPLE)

70

Crankshaft position
sensor

Transmission
range: N

Idling (Vehicle
stopped)

Waveform A

64

Input shaft speed sensor Transmission

range: Sport
mode

Driving at constant
speed of 50 km/h
(31 mph) in 4th
gear (Engine: 1,500
− 2,000 r/min)

Waveform B

73

Output shaft speed
sensor

79

Vehicle speed sensor

Waveform C

128

Low-reverse solenoid
valve

• Ignition

switch: ON

• Transmission

range: P

• Engine:

Stopped

• Throttle

(Accelerator)
opening
angle: Less
than 1 Volt

Force drive each
solenoid valve
(Actuator test)

Waveform D

137

Underdrive solenoid
valve

136

Second solenoid valve

138

Overdrive solenoid valve

129

Reduction solenoid
valve

130

Torque converter clutch
control solenoid valve

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

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WAVEFORM SAMPLE

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TRANSFER (ACTIVE TRAC 4WD II) DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1231110800051

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will find most transfer
malfunctions.
1. Gather as much information as possible about the

complaint from the customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any transfer Diagnostic

Trouble Codes (DTCs).

4. If you can not verify the condition and there are no

DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How

to Cope with Intermittent Malfunction

P.00-6

.

5. If there is a DTC, record the number of the code,

then erase the code from memory using scan tool
MB991958 (MUT-III sub assembly).

6. If a DTC is set again, go to Inspection Chart for

Diagnostic Trouble Codes.

7. If a DTC is not set again, the malfunction is

intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-6

.

8. After repairs are completed, confirm the

malfunction has been eliminated.

DIAGNOSTIC FUNCTION

M1231103300021

CHECK CENTER DIFFERENTIAL LOCK
INDICATOR LIGHT

The center differential lock indicator light flashes once per sec-
ond if there is an abnormality in any of the items below which
are related to the transfer system. Check for diagnostic trouble
codes if the center differential lock indicator light is flashing
once per second.

ON-BOARD DIAGNOSTICS

The transfer-ECU monitors its input/output signals
(some signals all the time and others under specified
conditions). When an irregular signal is initially moni-
tored, the transfer-ECU decides that a malfunction

has occurred and records the occurrence as a diag-
nostic trouble code. There are 21 diagnostic items.
The diagnostic results can be read with a scan tool.
Diagnostic trouble codes are kept in memory by
direct battery feed. The codes are retained in mem-

AC001872AE

WAVEFORM A

(V)

0

5

(ms)

AC001873AD

WAVEFORM B

(V)

0

5

(ms)

AC001873AE

WAVEFORM C

(V)

0

12

(ms)

AC001875AD

WAVEFORM D

(V)

0

20

(ms)

40

60

AC204846AB

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

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ory even if the ignition switch is in the "LOCK" (OFF)
position. Diagnostic trouble codes will, however, be
erased when a battery terminal or the transfer-ECU
connector is disconnected. In addition, the diagnostic
trouble code can also be erased by scan tool
MB991958 (MUT-III sub assembly).

NOTE: If a sensor is disconnected when the ignition
switch is in the "ON" position a diagnostic trouble
code is stored in memory. In this case, erase the
DTC using scan tool MB991958 (MUT-III sub assem-
bly).
The 21 diagnostic items are displayed in numeric
order.

HOW TO CONNECT THE SCAN TOOL (MUT-III)

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

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. Ensure that the ignition switch is at the "LOCK" (OFF)

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824

and the personal computer.

4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"

position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.

7. Start the MUT-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the
connecting sequence, making sure that the ignition switch is at
the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

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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.

NOTE: If the battery voltage is low, diagnostic trouble codes
will not be set. Check the battery if scan tool MB991958
does not display.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "SS4II" from the "POWER TRAIN" tab.
6. Select "MITSUBISHI."
7. Select "Diagnostic Trouble Code."
8. If a DTC is set, it is shown.
9. Choose "Erase DTCs" to erase the DTC.

HOW TO READ DATA LIST

Required Special Tools:

• MB991958 : Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

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. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "SS4II" from the "POWER TRAIN" tab.
6. Select "MITSUBISHI."
7. Select "Data List."
8. Choose an appropriate item and select the "OK" button.

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR