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Mitsubishi Lancer (4A9 engine). Manual - part 194

USB BOX

CHASSIS ELECTRICAL

54A-438

USB BOX

SPECIAL TOOLS

M1549100300062

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

M1549100400069

Refer to GROUP 00

− Contents of troubleshooting .

DIAGNOSIS MODE <VEHICLES WITH RADIO AND CD PLAYER>

M1549101600044

Enter the diagnosis mode according to the following
steps:

1. Turn the Ignition switch to the "ACC" or "ON"

position and switch off the radio and CD player.

Tool

Number

Name

Use

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check

harness

b. LED harness
c. LED harness

adapter

d. Probe

Continuity check and voltage
measurement at harness wire or
connector

a. For checking connector pin

contact pressure

b. For checking power supply

circuit

c. For checking power supply

circuit

d. For connecting a locally sourced

tester

MB992006

Extra fine probe

Continuity check and voltage
measurement at harness wire or
connector

MB991223

DO NOT USE

MB992006

USB BOX

CHASSIS ELECTRICAL

54A-439

2. Press the following buttons in that order within

sixty seconds from step (1).
(1) [CH1] button.
(2) Rewind button.
(3) Fast-forward button.
(4) [CH4] button.

NOTE: When the "Power" button of the radio and CD
player is pressed during the diagnosis mode, the
diagnosis mode will be cancelled, thus switching off
the radio and CD player.
3. "USB - BOX DIAG" is displayed.

AC711790

[CH4]

Fast-forward

Rewind

Power

[CH3]

AC905418

USB - BOX DIAG

H/W Ver.

S/W Ver.

CH4

CH3

Radio and CD player OFF

CH4

CH1

Rewind

Fast-forward

USB BOX

CHASSIS ELECTRICAL

54A-440

DIAGNOSIS MODE <VEHICLES WITH MMCS>

M1549101600022

HOW TO INITIATE THE SERVICE MODE
Refer to MMCS - Service mode .

HOW TO TERMINATE THE SERVICE MODE
Refer to MMCS - Service mode .

1. Select "USB BOX" on "Service" screen.

2. Displays the version information of the USB box.

NOTE:

•

H/W version: The hardware version informa-
tion of the USB box is displayed in 2 digits.

•

S/W version: The software version information
of the USB box is displayed in 7 digits.

TROUBLE SYMPTOM CHART

M1549100500118

NOTE: If the radio and CD player or multivision dis-
play is reset or sound jump occurs at the auto start
by Auto Stop & Go (AS&G) System, refer to .<Vehi-
cles with Auto Stop & Go (AS&G) System>

Description in the
illustrations

Actual display

Condition

USB - BOX DIAG

Displayed when the diagnosis mode is being entered.

H/W Ver.

H/W XX

Two-digit hardware version is displayed.

S/W Ver.

S/W XXXXXXX

Seven-digit software version is displayed.

Service

Vehicle Signal Check

Monitor Check

Camera Setting

Speaker Check

Network/Connect Line Check

Versions Indication

1/2

Sensor Check

USB BOX

Memory Initialization

Back

Next

Previous

CAN Communication Confirmation

AC904700

USB BOX

H/W version

S/W version

XX. YY. ZZZ

AC904707

Trouble symptom

Reference page

The USB adapter data cannot be replayed.

USB BOX

CHASSIS ELECTRICAL

54A-441

SYMPTOM PROCEDURES

The USB adapter data cannot be replayed. <Vehicles with radio and CD player>

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 mode,
the USB adapter, USB cable, USB box, or radio and
CD player may be defective, or a communication
error between the radio and CD player and USB box
may have occurred.

NOTE:

•

"LSI ERROR" is displayed on the audio display
when the USB box has an internal error. In this
case, the USB box has an internal error.

•

The ACC signal is received C-66 USB box con-
nector terminal No.15 from C-105 radio and CD
player 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 AUDIO display (centre panel
unit) as well as that of radio and CD player.
Therefore, check first if the AUDIO display (cen-
tre panel unit) is displayed. If the AUDIO display
(centre panel unit) is not displayed, carry out in
advance the troubleshooting of "The radio and
CD player does not operate normally by operat-
ing the audio control unit of the centre panel unit".
(Refer to <Vehicles without Auto Stop & Go
(AS&G) System> or <Vehicles with Auto Stop &
Go (AS&G) System>..)

PROBABLE CAUSES

• The radio and CD player 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 radio and CD player
operation.
Check if the radio and CD player work normally and
the sound is output.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Troubleshoot the radio and CD player
(Refer to ).

STEP 2. Check the external sounds input mode.
Check if the radio and CD player is switched to the
"USB mode".

Q: Is the check result normal?

ACA00892

Connectors: C-66, C-105 <LHD>

C-105

C-66

ACA00892AW

ACA00896

Connector: C-66 <RHD>

ACA00895AU

Connector: C-105 <RHD>

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