Mitsubishi Lancer Evolution IX. Manual - part 606

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-107

STEP 7. Connectors check: C-25 4WD-ECU 
connector, C-124, C-134, F-21 intermediate 
connector, F-24 proportional valve connector 
<LH drive vehicles> or C-25 4WD-ECU connector, 
C-134, C-138, F-21 intermediate connector, F-24 
proportional valve connector <RH drive 
vehicles>.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the defective connector.

AC311002

4WD-ECU

Harness side

C-25 (Y)

AB

Connector: C-25

4WD-ECU

C-25 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

AC311015AB

Connector: C-124 <LH drive vehicles>

C-124

AC311015AG

Connector: C-134 <LH drive vehicles>

C-134 (B)

AC311016AD

Connector: C-134 <RH drive vehicles>

C-134 (GR)

AC311016AB

Connector: C-138 <RH drive vehicles>

C-138

AC311042

F-21 (B)

AE

Connector: F-21, F-24

F-24 (B)

F-21

Valve side

F-24

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-108

STEP 8. Check the harness between 4WD-ECU 
connector C-25 terminal No.1 and proportional 
valve connector F-24 terminal No.3.

Check the output line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

AC311002

4WD-ECU

Harness side

C-25 (Y)

AB

Connector: C-25

4WD-ECU

C-25 (Y)

Rear console 
assembly

<LH drive vehicles>

<RH drive vehicles>

AC311042

AD

Connector: F-24

F-24 (B)

Valve side

F-24

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-109

Code No.81 Electric pump relay system (open circuit or short circuit)

ELECTRIC
PUMP

ELECTRIC
PUMP RELAY

4WD-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

FUSIBLE
LINK

27

Electric pump relay system circuit <LH drive vehicles>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-110

OPERATION

The electric pump relay provides power to activate 
the electric pump according to the signal from the 
4WD-ECU.

DIAGNOSIS CODE SET CONDITIONS

Code No.81 is set when the coil circuit of the electric 
pump relay has open circuit or short circuit.

PROBABLE CAUSES

• Malfunction of electric pump relay

• Damaged harness wires and connectors

• Malfunction of the 4WD-ECU

DIAGNOSIS

STEP 1. M.U.T.-II/III actuator test
Item 04: Electric pump drive

OK: Operating sound can be heard.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Go to Step 2.

STEP 2. Check the electric pump relay.
Refer to 

P.22A-169

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the electric pump relay.

ELECTRIC
PUMP

ELECTRIC
PUMP RELAY

4WD-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

FUSIBLE
LINK

27

Electric pump relay system circuit <RH drive vehicles>