Mitsubishi Lancer Evolution IX. Manual - part 596

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-67

STEP 8. Check the harness between ABS-ECU 
connector B-118 terminal No.25 and longitudinal 
G-sensor connector D-38 terminal No.2.

Check the output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness.

AC311020

Harness side

B-118 
(B)

AB

Connector: B-118

<LH drive vehicles>

<RH drive vehicles>

B-118 
(GR)

B-118

AC311048

<LH drive vehicles>

Sensor side

D-38 (B)

AB

Connector: D-38

<RH drive vehicles>

D-38 (B)

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-68

Code No.56 Lateral G-sensor system (open circuit or short circuit)

IGNITION
SWITCH (IG2)

ABS-ECU

4WD-ECU

G-SENSOR
(LATERAL)

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

G-sensor (lateral) system circuit <LH drive vehicles>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-69

OPERATION

The 4WD-ECU receives the acceleration level of the 
vehicle in the right/left direction from the lateral G 
sensor.

DIAGNOSIS CODE SET CONDITIONS

Code No.56 is set when the output signal of the lat-
eral G sensor is below 0.5 V or above 4.5 V.

PROBABLE CAUSES

• Malfunction of the lateral G-sensor

• Damaged harness wires and connectors

• Malfunction of the ABS-EC

• Malfunction of the 4WD-ECU

DIAGNOSIS

STEP 1. M.U.T.-II/III data list
Item 15: Lateral G-sensor voltage (Refer to data list 
reference table 

P.22A-142

).

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.

IGNITION
SWITCH (IG2)

ABS-ECU

4WD-ECU

G-SENSOR
(LATERAL)

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

G-sensor (lateral) system circuit <RH drive vehicles>

TROUBLESHOOTING <ACD>

MANUAL TRANSMISSION (FF)

22A-70

STEP 2. Measure the voltage at lateral G-sensor 
connector D-37.

(1) Disconnect the lateral G-sensor connector, and 

measure the voltage between terminal No.1 and 
earth.

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

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 3.

STEP 3. Connector check: C-211, C-214 J/B 
connector, D-37 lateral G-sensor connector.

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

AC311048

<LH drive vehicles>

Sensor side

D-37 (B)

AC

Connector: D-37

<RH drive vehicles>

D-37 (B)

AC310448

AW

Connector: C-211, C-214 <LH drive vehicles>

Junction block (front view)

C-214

C-211

C-211

C-214

AC310458

AS

Connector: C-211, 
C-214 <RH drive vehicles>

C-214

C-211

C-214

Junction block (front view)

C-211

AC311048

<LH drive vehicles>

Sensor side

D-37 (B)

AC

Connector: D-37

<RH drive vehicles>

D-37 (B)