Mitsubishi Lancer (4A9 engine). Manual — part 201

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-466

Inspection Procedure 4: When the speech switch is pressed, the voice information is not output.
<Vehicles with radio and CD player>

CAUTION

Before replacing the hands free ECU, ensure that the power supply circuit, the earth circuit and the
communication circuit are normal.

Steering Wheel Voice Control Switch Circuit

RADIO AND CD PLAYER

CLOCK
SPRING

STEERING
WHEEL
AUDIO
REMOTE
CONTROL
SWITCH

STEERING
WHEEL
VOICE
CONTROL
SWITCH

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

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-467

COMMENTS ON TROUBLE SYMPTOM
If the voice information is not sent when the speech
switch is pushed, the communication between the
radio and CD player, and the hands free ECU, or the
communication between the radio and CD player,
and the steering wheel voice control switch, the
hands free ECU, or the steering wheel voice control
switch may have a problem.

PROBABLE CAUSES

• The radio and CD player may be defective.

• The hands free ECU may be defective.

• The steering wheel audio remote control switch

may be defective.

• The steering wheel voice control switch may be

defective.

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the diagnosis mode
Check if the hands free ECU can be switched to the
diagnosis mode.(Refer to .)

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Perform Inspection Procedure 5
"DIAGNOSIS MODE cannot be made an
entry."(Refer to .)

STEP 2. Operation check of the steering wheel
audio remote control switch
Check that the radio and CD player can be operated
by the steering wheel audio remote control switch.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Troubleshoot the steering wheel audio
remote control switch.

STEP 3. Check the steering wheel voice control
switch.
Check the continuity of the steering wheel voice con-
trol switch. (Refer to steering wheel voice control
switch inspection. )

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Replace the steering wheel voice control
switch.

STEP 4. Check the steering wheel audio remote
control switch.
Check the continuity of the steering wheel audio
remote control switch. (Refer to steering wheel audio
remote control switch inspection. )

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Replace the steering wheel audio remote
control switch.

STEP 5. Check the harness wire between C-202
steering wheel audio remote control switch
connector terminal No. 3 and C-209 steering
wheel voice control switch connector terminal
No.3.

• Check the communication lines for open circuit

and short circuit.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the wiring harness.

STEP 6. Connector check: C-304 clock spring
connector.

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the defective connector.

AC612708 AR

Connectors: C-202, C-204, C-209 <LHD>

C-202 (R)

C-204

C-209 (Y)

AC612716 AI

Connectors: C-202, C-204, C-209 <RHD>

C-202 (R)

C-204

C-209 (Y)

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-468

STEP 7. Check the harness wire between C-204
clock spring connector terminal No. 4 and C-209
steering wheel voice control switch connector
terminal No.2.

• Check the communication lines for open circuit

and short circuit.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair the wiring harness.

STEP 8. Temporarily replace the hands free ECU,
and check the trouble symptom.

Q: Is the check result normal?

YES :

Replace the hands free ECU.

NO :

Replace the radio and CD player.

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-469

Inspection Procedure 4: When the speech switch is pressed, the voice information is not output.
<Vehicles with MMCS>

CAUTION

Before replacing the hands free module, ensure that the power supply circuit, the earth circuit and
the communication circuit are normal.

Steering Wheel Voice Control Switch Circuit

CLOCK
SPRING

STEERING
WHEEL
AUDIO
REMOTE
CONTROL
SWITCH

STEERING
WHEEL
VOICE
CONTROL
SWITCH

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

MULTIVISION DISPLAY