Mitsubishi Lancer (4A9 engine). Manual - part 195

USB BOX

CHASSIS ELECTRICAL

54A-442

YES : 

Go to Step 3.

NO : 

Switch to the "USB mode".

STEP 3. Check the audio display
Check if the audio display is displayed the "LSI 
ERROR".

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Go to Step 4.

STEP 4. Check the USB adapter.
Check if the USB adapter works normally.(Refer to )

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the USB adapter.

STEP 5. Check the USB cable.
Check that the USB cable is connected to the USB 
adapter or USB box normally. Or check the USB 
cable for damage such as bend.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace or repair the USB cable.

STEP 6. Connector check: C-66 USB box 
connector, C-128 intermediate connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the defective connector.

STEP 7. Voltage measurement at C-66 USB box 
connector.
(1) Disconnect the connector, and measure at the 

wiring harness-side connector.

(2) Voltage between C-66 USB box connector 

terminal No.1 and the body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Go to Step 8.

STEP 8. Check the wiring harness between C-66 
USB box connector terminal No.1 and C-128 
intermediate connector terminal No.9.

• Check the power supply lines (battery power sup-

ply) for open circuit and short circuit.

NOTE: Prior to the wiring harness inspection, check 
the intermediate connector C-31, C-128, and repair if 
necessary.

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 : 

Repair the wiring harness.

STEP 9. Resistance measurement at C-66 USB 
box connector.
(1) Disconnect C-66 USB box connector, and 

measure the resistance available at the wiring 
harness side of the connector.

(2) Check the continuity between terminal No.17 and 

body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 10.

STEP 10. Check the wiring harness between C-66 
USB box connector terminal No.17 and body 
earth.

• Check the earth wires for open circuit.

NOTE: Prior to the wiring harness inspection, check 

the joint connector C-231, and repair if neces-
sary.

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 : 

Repair the wiring harness. 

STEP 11. Connector check: C-105 radio and CD 
player connector

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the defective connector.

STEP 12. Check the wiring harness between C-
105 radio and CD player connector terminal No. 
12, 3, 1, 10, 17 and C-66 USB box connector 
terminal No. 8, 22, 2, 16, 15.

• Check the communication line for open circuit 

and short circuit.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the wiring harness.

USB BOX

CHASSIS ELECTRICAL

54A-443

STEP 13. Replace the USB box temporarily, and 
check the trouble symptom.
Replace the USB box temporarily, and check that the 
sound is output from the speaker.

Q: Is the check result normal?

YES : 

Replace the USB box.

NO : 

Replace the radio and CD player.

The USB adapter data cannot be replayed. <Vehicles with MMCS>

CAUTION

Before replacing the USB box, ensure that the power supply circuit, the earth circuit and the commu-
nication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM
If the sound replay is impossible with the USB/iPod 
mode, the USB adapter, USB cable, USB box, or 
multivision display may be defective, or a communi-
cation error between the multivision display and USB 
box may have occurred.

NOTE: 

.

•

The ACC signal is received C-66 USB box con-
nector terminal No.15 from C-141 multivision dis-
play connector terminal No.17.

•

From the fusible link to C-128 intermediate con-
nector, the USB box uses the same power supply 
circuit as that of multivision display. Therefore, 
check first if the multivision display operates nor-
mally. If the multivision display does not operate 
normally, carry out in advance the troubleshoot-
ing of "No navigation screen is displayed". (Refer 
to  <Vehicles without Auto Stop & Go (AS&G) 
System> or  <Vehicles with Auto Stop & Go 
(AS&G) System>.)

PROBABLE CAUSES

• The multivision display may be defective.

• The USB box may be defective.

• The USB adapter may be defective.

• The USB cable may be defective.

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the multivision display operation.
Check if the multivision display work normally and 
the sound is output.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Troubleshoot the MMCS. (Refer to .)

STEP 2. Check the multivision display operation.
Display the A/V Mode screen, and check that the 
"USB/iPod" item is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 5.

ACB02646

AG

C-142 (GR)

C-141

C-66

Connectors: C-66, C-141, C-142 <LHD>

ACA00896

AF

Connector: C-66 <RHD>

ACB02648

AH

C-141

Connectors: C-141, C-142 <RHD>

C-142 (GR)

USB BOX

CHASSIS ELECTRICAL

54A-444

STEP 3. Check the USB adapter.
Check that the continuity exists between the front 
side terminals of USB adapter and rear side termi-
nals of USB adapter.(Refer to )

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the USB adapter.

STEP 4. Check the USB cable.
Check that the USB cable is connected to the USB 
adapter or USB box normally. Or check the USB 
cable for damage such as bend.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Replace or repair the USB cable.

STEP 5. Connector check: C-66 USB box 
connector, C-128 intermediate connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. Voltage measurement at C-66 USB box 
connector.
(1) Disconnect the connector, and measure at the 

wiring harness-side connector.

(2) Voltage between C-66 USB box connector 

terminal No.1 and the body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 7.

STEP 7. Check the wiring harness between C-66 
USB box connector terminal No.1 and C-128 
intermediate connector terminal No.10.

• Check the power supply lines (battery power sup-

ply) for open circuit and short circuit.

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 : 

Repair the wiring harness.

STEP 8. Resistance measurement at C-66 USB 
box connector.
(1) Disconnect C-66 USB box connector, and 

measure the resistance available at the wiring 
harness side of the connector.

(2) Check the continuity between terminal No.17 and 

body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 9.

STEP 9. Check the wiring harness between C-66 
USB box connector terminal No.17 and body 
earth.

• Check the earth wires for open circuit.

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 : 

Repair the wiring harness.

STEP 10. Connector check: C-141, C-142 
multivision display connector

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the defective connector.

STEP 11. Check the wiring harness between C-
141 multivision display connector terminal No 61, 
45 and C-66 USB box connector terminal No 8, 
22.

• Check the communication line for open circuit 

and short circuit.

NOTE: Prior to the wiring harness inspection, check 
intermediate connectors C-140, and repair if neces-
sary.

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the wiring harness.

STEP 12. Check the wiring harness between C-
141 multivision display connector terminal No 83, 
84, 82 and C-66 USB box connector terminal No 
2, 16, 15.

• Check the communication line for open circuit 

and short circuit.

NOTE: Prior to the wiring harness inspection, check 
intermediate connectors C-140, and repair if neces-
sary.

Q: Is the check result normal?

USB BOX

CHASSIS ELECTRICAL

54A-445

YES : 

Go to Step 13.

NO : 

Repair the wiring harness.

STEP 13. Replace the USB box temporarily, and 
check the trouble symptom.
Replace the USB box temporarily, and check that the 
sound is output from the speaker.

Q: Is the check result normal?

YES : 

Replace the USB box.

NO : 

Replace the multivision display.

USB ADAPTER REMOVAL AND 
INSTALLATION

M1549100800216

USB BOX REMOVAL AND INSTALLATION

M1549100900105

USB ADAPTER INSPECTION

M1549101100135

1. Remove the USB adapter. (Refer to )

Pre-removal operation
• Removal of glove box cover (Refer to GROUP 52A − 

glove box )

Post-installation operation
• Installation of glove box cover (Refer to GROUP 52A − 

glove box )

ACA00808

Glove box
cover

AB

USB adapter

Pre-removal operation
• Removal of glove box cover (Refer to GROUP 52A − 

glove box )

Post-installation operation
• Installation of glove box cover (Refer to GROUP 52A − 

glove box )

ACA00184

1

2

AB

Removal Steps 

1.

USB cable

2.

USB box