Mitsubishi Galant (2004+). Manual — part 1050

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1017

STEP 3. Check for open circuit and short circuit to ground
and harness damage between generator connector B-116
(terminal No. 1) and PCM connector B-23 (terminal No.
132).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK303884

2

1

3

4

AB

CONNECTOR: B-116

B-116 (GR)

HARNESS
CONNECTOR:
COMPONENT SIDE

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1018

INSPECTION PROCEDURE 27: Fans (radiator fan, A/C condenser fan) are inoperative

.

COMMENT

• The fan control relay is controlled by the power

transistor inside the PCM turning "ON" and
"OFF".

.

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

• Malfunction of the fan control relay.

• Malfunction of the fan condenser fan relay.

• Malfunction of the radiator fan relay.

• Malfunction of the condenser fan motor.

• Malfunction of the radiator fan motor.

• Improper connector contact, open or shorted har-

ness wire.

• PCM failed.

RED-WHITE

AK303260

5

POWERTRAIN
CONTROL
MODULE (PCM)

RADIATOR
FAN RELAY

WHITE-RED

WHITE-RED

CONDENSER
FAN RELAY

BLUE-ORANGE

10

FAN CONTROL
RELAY

B-19

1 2 3 4

5 6 7

8 9 10 11

12 13 14

15 16 17 18

AK303147

CONNECTOR: B-19

PCM

AB

AIR CLEANER

B-19 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1019

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check harness connector B-19 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1020

STEP 2. Check the fan condition.
(1) Disconnect the B-19 at PCM connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the fan condition.

• When the terminal No.10 is grounded by the jumper

cable, the radiator and condenser fans should run.

• When the terminal No.10 is grounded first and then both

of the terminal No.10 and No.5 are grounded next,
check that the rotation speed of fan is higher than the
rotation speed when the terminal No.10 is grounded.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fan condition normal?

YES : Go to Step 3.
NO : Refer to GROUP 14, Symptom Chart

P.14-3

.

STEP 3. Using scan tool MB991958, check data list item 21:
Engine Coolant Temperature Sensor.

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) Start the engine and run at idle.
(3) Check the following items in the data list. Refer to Data List

Reference Table

P.13A-1063

.

a. Item 21 Engine Coolant Temperature Sensor.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 4.
NO : Repair and replace. Then confirm that the malfunction

symptom is eliminated.

AK303257

1 2 3 4

5 6 7

8 9 10 11

12 13 14

15 16 17 18

B-19 HARNESS CONNECTOR:
COMPONENT SIDE

AB

AK303259

1 2 3 4

5 6 7

8 9 10 11

12 13 14

15 16 17 18

B-19 HARNESS CONNECTOR:
COMPONENT SIDE

AB

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827