Mitsubishi Montero (2002-2004). Manual - part 919

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 13. Check the harness for an open or short circuit to
ground between A/T control solenoid valve assembly
connector C-03 (terminals 6, 7, 8 and 10) and solenoid
valve connectors C-03-4, C-03-5 and C-03-6.
Q: Is the harness wire in good condition?

YES : Replace the PCM.
NO : Replace the harness wire.

AC204395

CONNECTOR : C-03

C-03 (B)

AC204749

CONNECTORS : C-03-4, C-03-5, C-03-6

1
2

C-03-4

1
2

C-03-5

1
2

C-03-6

C-03-4

C-03-6

C-03-5

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DTC 32: Underdrive Solenoid Valve System

Solenoid Valve System Circuit
Refer to

P.23Ac-147

CIRCUIT OPERATION
Refer to

P.23Ac-147

DTC SET CONDITIONS
If the resistance value for the underdrive solenoid
valve circuit is greater than 3.5 ohms (open) or less
than 2.6 ohms (short) for 4 seconds, DTC 32 is set.
The transmission is locked into 3rd gear as a fail-
safe measure, and the "N" range light flashes once
per second.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• Malfunction of underdrive solenoid valve

• Damaged harness, connector

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check actuator test
item 02: Underdrive Solenoid Valve.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to actuator test mode for item 02,

Underdrive Solenoid Valve.

• An audible clicking or buzzing should be heard when the

underdrive solenoid valve is energized.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid valve 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 Malfunctions

P.00-6

NO : Go to Step 2.

ACX01539AD

MB991502

16-PIN

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STEP 2. Using scan tool MB991502, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 54 set? (DTC 54 may be set along with multiple

DTCs.)
YES : Refer to

P.23Ac-237

DTC 54: A/T Control Relay

System.

NO : Go to Step 3.

STEP 3. Using scan tool MB991502, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are DTC 33 and DTC 34 set? (Multiple DTCs may be set.)

YES : Go to Step 8.
NO : Go to Step 4.

STEP 4. Measure the underdrive solenoid valve resistance
at A/T control solenoid valve assembly connector C-03.
(1) Disconnect connector C-03 and measure at the solenoid

valve side.

(2) Measure the resistance between solenoid valve assembly

connector C-03 terminals 3 and 9.

Resistance value: 2.7

− 3.4 ohms [at 20°C (68°F)]

Q: Is the measured resistance 2.7

− 3.4 ohms [at 20°C

(68

°F)]?

YES : Go to Step 6.
NO : Go to Step 5.

ACX01539AD

MB991502

16-PIN

ACX01539AD

MB991502

16-PIN

AC204395

CONNECTOR : C-03

C-03 (B)

AC204918

C-03 HARNESS CONNECTOR :
SOLENOID VALVE SIDE

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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STEP 5. Measure the solenoid valve resistance at the
underdrive solenoid valve connector C-03-2 inside the
transmission.
(1) Disconnect solenoid valve connector C-03-2 and measure

at the solenoid valve side.

(2) Measure the resistance between underdrive solenoid valve

terminals 1 and 2.

Resistance value: 2.7

− 3.4 ohms [at 20°C (68°F)]

Q: Is the measured resistance 2.7

− 3.4 ohms [at 20°C

(68

°F)?

YES : Replace the harness wire between A/T control

solenoid valve assembly connector C-03 and the
solenoid valves.

NO : Replace the underdrive solenoid valve. Refer to

GROUP 23B, Valve Body

P.23B-80

AC204748

CONNECTOR : C-03-2

1
2

AC204918

C-03-2 HARNESS CONNECTOR :
UNDERDRIVE SOLENOID
VALVE SIDE

1
2

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