Mitsubishi Montero Sport (2004+). Manual - part 563

RADIO AND TAPE PLAYER

TSB Revision

CHASSIS ELECTRICAL

54-239

CIRCUIT OPERATION
The antenna motor-ECU extends or retracts the
antenna when the radio switch is turned on or off with
the ignition switch in the "ACC" or "ON" position.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a defective motor antenna cir-
cuit system.

TROUBLESHOOTING HINTS

• Malfunction of the motor antenna

• Malfunction of the antenna motor-ECU

• Malfunction of the radio and CD player

• Damaged harness wire or connector

DIAGNOSIS

STEP 1. Clean and polish the surface of the antenna pole,
and then check the trouble symptom.
Q: Is a malfunction eliminated?

YES : The procedure is complete.
NO : Go to Step 2.

AC003431

CONNECTOR: A-54X

A-54X

AC003515

CONNECTORS: C-16, C-19

C-16

C-19

AC003514

CONNECTORS: C-34, C-41

C-34

C-41

AC003489

CONNECTOR: C-62

C-62

AC003460 AB

CONNECTORS: D-01, D-06

D-01

D-06

JUNCTION BLOCK (FRONT)

AC003457AE

CONNECTOR: D-08

JUNCTION BLOCK (REAR)

D-08

RADIO AND TAPE PLAYER

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CHASSIS ELECTRICAL

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STEP 2. Clean the antenna.
Q: Is a the antenna bent?

YES : Repair the bend or replace the antenna pole.
NO : Go to Step 3.

STEP 3. Check the motor antenna's motor.

(1) Disconnect motor antenna connector C-19.

(2) Check that the antenna pole rise when the positive side of

the battery is connected to terminal number 1 or motor

antenna connector C-19 and the negative side of the
battery is connected to terminal number 2. Check that the
antenna pole lowers when the connection is reversed.

Q: Is the motor in good condition?

YES : Go to Step 4.
NO : Replace the motor antenna.

STEP 4. Check the antenna motor-ECU.

(1) Remove the antenna motor-ECU mounting bolts.
(2) Operate the radio switch when the ignition switch is turned

to the "ACC" or "ON" position. Measure the voltage
between the terminals while the antenna is attempting to
extend or retract.

Q: Is the antenna motor-ECU in good condition?

YES : Go to Step 5.
NO : Replace the antenna motor-ECU.

AC201729

1
2

COMPONENT
SIDE

CONNECTOR: C-19

C-19

AC002812

C-19 HARNESS CONNECTOR:
MOTOR ANTENNA SIDE

ANTENNA
OPERATION
DIRECTION

TERMINAL NO.
TO BE
CONNECTED
TO BATTERY

SPECIFIED
CONDITION

While lowering

− 3

− 13 volts

While rising

− 3

− 13 volts

AC002813

ANTENNA
RETRACT

ANTENNA

EXTEND

RADIO AND TAPE PLAYER

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CHASSIS ELECTRICAL

54-241

STEP 5. Measure the voltage at motor antenna power
supply circuit (motor antenna extension side).

(1) Disconnect motor antenna connector C-19 and measure at

the harness side.

(2) Turn the ignition switch to "ON" position.
(3) Turn the radio switch to "ON" position.

(4) Measure the voltage between terminal number 1 and

ground.

• The measured value should be approximately 12 volts

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES : Go to Step 6.
NO : Go to Step 7.

STEP 6. Measure the voltage at motor antenna power
supply circuit (motor antenna retraction side).

Measure the voltage between terminal number 2 and ground.

• The measured value should be approximately 12 volts

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES : Motor antenna is normal. Check that the malfunction

is eliminated.

NO : Go to Step 7.

STEP 7. Check harness connector C-19 at the motor
antenna for loose, corroded or damaged terminals, or
terminals pushed back in the connector.

Q: Is motor antenna connector C-19 in good condition?

YES : Go to Step 8.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

AC201729

1
2

COMPONENT
SIDE

CONNECTOR: C-19

C-19

AC002814

C-19 HARNESS CONNECTOR:
COMPONENT SIDE

AC002815

CONNECTOR C-19
(HARNESS SIDE)

AC201729

1
2

COMPONENT
SIDE

CONNECTOR: C-19

C-19

RADIO AND TAPE PLAYER

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CHASSIS ELECTRICAL

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STEP 8. Check the harness wires between motor antenna
connector C-19 (terminal No. 1 and 2) and antenna
motor-ECU connector C-34 (terminal No. 1 and 4).

NOTE: After inspecting intermediate connector C-16, inspect
the wire. If intermediate connector C-16 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion

P.00E-2

Q: Are the harness wires between motor antenna

connector C-19 (terminal No. 1 and 2) and antenna
motor-ECU connector C-34 (terminal No. 1 and 4) in
good condition?
YES : Go to Step 9.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

AC201807

1
2

2021

1718

6 7

1415

4 5

1112

1 2 3

C-16

C-19

C-16

C-19 COMPONENT SIDE

CONNECTORS: C-16, C-19

AC201808

CONNECTOR : C-34

COMPONENT SIDE

C-34

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