Mitsubishi Lancer (4A9 engine). Manual — part 185

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-402

DIAGNOSIS PROCEDURE

STEP 1. Perform "Vehicle Signal Check" in the
MMCS service mode.
Perform "Vehicle Signal Check" in the MMCS service
mode to check whether vehicle speed signal is nor-
mal (Refer to ).

Q: Is the vehicle speed signal transmitted normally?

YES :

Replace the multivision display.

NO :

Go to Step 2.

STEP 2. Check the speedometer.
Check whether the speedometer works normally.

Q: Does the speedometer work normally?

YES :

Go to Step 3.

NO :

Diagnose the combination meter (Refer to
Combination meter

− Troubleshooting ).

STEP 3. Connector check: C-01 combination
meter connector, C-144 multivision display
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

STEP 4. Check the wire harness between C-01
combination meter connector terminal No.20 and
C-144 multivision display connector terminal
No.13.

• Check the communication line for open circuit or

short circuit.

NOTE: Prior to the wiring harness inspection, check
intermediate connector C-139, and repair if neces-
sary.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the wiring harness.

STEP 5. Substitute a known good multivision
display, and check the trouble symptom.
Check that no menus are active during driving.

Q: Is the check result normal?

YES :

Replace the multivision display.

NO :

Replace the combination meter.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-403

Inspection Procedure 5: The screen is not normal in the navigation mode. (The own vehicle mark is
dislocated.) <Except vehicles for RUSSIA>

CAUTION

Before replacing the multivision display, ensure that the power supply circuit, the earth circuit, and
the communication circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM
There is a failure in the wiring harness between the
combination meter and the multivision display, the
GPS antenna, the respective connector(s), the com-
bination meter or the multivision display.
NOTE: If the vehicle speed signal has a problem, the
speedometer of combination meter will be affected.
Confirm if the speedometer of combination meter
works normally at the abnormal state to customers.

PROBABLE CAUSES

• Malfunctions of GPS antenna

Multivision Display Communication Circuit

COMBINATION
METER

INTERFACE
CIRCUIT

MULTIVISION
DISPLAY

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

AC701093 BM

Connector: C-01 <LHD>

AC701122 CM

Connectors: C-01, C-144 <RHD>

C-01

C-144 (GR)

AC701094

Connector: C-144 <LHD>

BJ

C-144 (GR)

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-404

• Malfunctions of combination meter

• Malfunctions of multivision display

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Confirmation in MMCS service mode
Check the items below in the MMCS service mode
(Refer to ).

• Perform "Network/Connect Line Check" in the

MMCS service mode to check that the communi-
cation and wire connection with the GPS are in
good condition.

• Perform "Vehicle Signal Check", and then check

the status of the vehicle speed signal.

• Perform "Sensor Check", and then check the

status of the vehicle speed sensor and the gyro
sensor.

Q: Is the check result normal?

YES (OK for all) :

Go to Step 6.

NO <GPS is not OK> :

Go to Step 2.

NO <The vehicle speed sensor is not OK, or vehicle
speed pulse does not increase after starting from a
standstill> :

Go to Step 3.

NO <Gyro sensor is not OK> :

Go to Step 6.

STEP 2. GPS reception check
(1) Start the multivision display.
(2) Press the [INFO] button.
(3) Select [Vehicle Position].
(4) Check if the GPS signals are received.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Perform Inspection Procedure 7 "GPS
signal cannot be received" (Refer to .), and
then go to Step 6.

STEP 3. Check the speed meter.
Check whether the speed meter works normally.
(Refer to .)

Q: Does the speedometer work normally?

YES :

Go to Step 4.

NO :

Diagnose the combination meter (Refer to
Combination meter

− Troubleshooting ).

STEP 4. Connector check: C-01 combination
meter connector, C-144 multivision display
connector

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the defective connector.

STEP 5. Check the harness wire between C-01
combination meter connector terminal No.20 and
C-144 multivision display connector terminal
No.13.

• Check the signal line for open circuit or short cir-

cuit.

NOTE: Prior to the wiring harness inspection, check
intermediate connector C-139, and repair if neces-
sary.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the wiring harness.

STEP 6. Check of the troubles
Drive the vehicle for some time with the GPS signals
being received, and check if the own vehicle mark is
dislocated.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Replace the multivision display.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-405

Inspection Procedure 5: The screen is not normal in the navigation mode. (The own vehicle mark is
dislocated.) <Vehicles for RUSSIA>

CAUTION

Before replacing the multivision display, ensure that the power supply circuit, the earth circuit, and
the communication circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM
There is a failure in the wiring harness between the
combination meter and the multivision display, the
GPS antenna, the respective connector(s), the com-
bination meter or the multivision display.
NOTE: If the vehicle speed signal has a problem, the
speedometer of combination meter will be affected.
Confirm if the speedometer of combination meter
works normally at the abnormal state to customers.

PROBABLE CAUSES

• Malfunctions of GPS antenna

• Malfunctions of combination meter

• Malfunctions of multivision display

• Damaged harness wires and connectors

Multivision Display Communication Circuit

COMBINATION
METER

INTERFACE
CIRCUIT

MULTIVISION
DISPLAY

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

AC701093 BM

Connector: C-01 <LHD>

AC701094

Connector: C-144 <LHD>

BJ

C-144 (GR)