Mitsubishi Galant (2004+). Manual - part 999

 

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Mitsubishi Galant (2004+). Manual - part 999

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-813

DTC P1021: Engine Oil Control Valve Circuit

1

2

3

4

1 2

MFI RELAY

B-17X

ENGINE OIL 
CONTROL VALVE

POWERTRAIN CONTROL 

MODULE (PCM)

1

2

4

1

2

128

3

Engine Oil Control Valve Circuit

BATTERY

B-23

B-33

MU802779

RED-

WHITE

RED-

WHITE

WHITE-RED

RED

AK303895

121 122 123 124 125 126 127

128 129 130 131 132 133

134 135 136 137 138 139 140

141 142 143 144 145 146

147 148 149 150 151 152 153

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-814

.

CIRCUIT OPERATION

• The engine oil control valve power is supplied 

from the MFI relay (terminal No. 4).

• The PCM controls ground engine oil control valve 

by turning the power transistor in the PCM "ON" 
and "OFF".

.

TECHNICAL DESCRIPTION

• The engine oil control valve switches the cams to 

operate the MIVEC system in the low-speed or 
high-speed mode in accordance with the signals 
from the PCM.

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch: "ON"

• Battery positive voltage is higher than 10 volts.

• MIVEC operating in the low-speed mode.

Judgment Criteria

• The PCM terminal voltage of engine control valve 

circuit is less than 1.5 volts for 2 seconds.

.

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

• Engine oil control valve failed.

• Open or shorted engine oil control valve circuit, or 

harness damage or connector damage.

• PCM failed.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991923: Power Plant ECU Check Harness

AK303896AB

CONNECTOR: B-33

ENGINE OIL 
CONTROL VALVE

B-33 (B)

RADIATOR
UPPER HOSE

AK303803AB

CONNECTOR: B-17X

MFI RELAY

B-17X

AK303059

CONNECTOR: B-23

PCM

AB

AIR CLEANER

B-23

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-815

STEP 1. Check harness connector B-33 at the engine oil 
control valve 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 go to Step 12.

STEP 2. Check the engine oil control valve.

(1) Disconnect the engine oil control valve connector B-33.

(2) Measure the resistance between engine oil control valve 

side connector terminal No. 1 and No. 2.

Standard value: 6.9 

 7.9 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 6.9 and 7.9 ohms 

[at 20

°C (68°F)]?

YES : Go to Step 3.
NO :  Replace the engine oil control valve. Then go to Step 

12.

AK303897

1

2

AB

CONNECTOR: B-33

B-33 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK303897

1

2

AB

CONNECTOR: B-33

B-33 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK302152

1 2

AC

ENGINE OIL CONTROL
VALVE CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-816

STEP 3. Measure the power supply voltage at engine oil 
control valve harness side connector B-33.

(1) Disconnect the connector B-33 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : 
Go to Step 5.
NO :  Go to Step 4.

STEP 4. Check harness connector B-17X at MFI relay for 
damage.

Q: Is the harness connector in good condition?

YES : Repair harness wire between MFI relay connector 

B-17X (terminal No. 4) and engine oil control valve 
connector B-33 (terminal No. 1) because of open 
circuit or short circuit to ground. Then go to Step 12.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12. 

AK303897

1

2

AB

CONNECTOR: B-33

B-33 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

1

2

AK302157

B-33 HARNESS
CONNECTOR:
COMPONENT SIDE

AC

AK303806

2

1

3

4

AB

CONNECTOR: B-17X

B-17X

RELAY BOX
TRIANGLE 
MARK

HARNESS CONNECTOR:
COMPONENT SIDE

 

 

 

 

 

 

 

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