Mitsubishi Montero Sport (2004+). Manual — part 563
RADIO AND TAPE PLAYER
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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
AC
AC003515
AB
CONNECTORS: C-16, C-19
C-16
C-19
AC003514
CONNECTORS: C-34, C-41
C-34
C-41
AB
AC003489
AC
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
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CHASSIS ELECTRICAL
54-240
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
AB
CONNECTOR: C-19
C-19
AC002812
AC
C-19 HARNESS CONNECTOR:
MOTOR ANTENNA SIDE
ANTENNA
OPERATION
DIRECTION
TERMINAL NO.
TO BE
CONNECTED
TO BATTERY
SPECIFIED
CONDITION
While lowering
1
− 3
10
− 13 volts
While rising
4
− 3
10
− 13 volts
AC002813
AC
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
.
AC201729
1
2
COMPONENT
SIDE
AB
CONNECTOR: C-19
C-19
AC002814
C-19 HARNESS CONNECTOR:
COMPONENT SIDE
AC
AC002815
AB
CONNECTOR C-19
(HARNESS SIDE)
AC201729
1
2
COMPONENT
SIDE
AB
CONNECTOR: C-19
C-19
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CHASSIS ELECTRICAL
54-242
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
.
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
.
AC201807
1
2
22
2021
10
9
8
1718
6 7
19
1415
4 5
1112
1 2 3
13
16
C-16
C-19
AB
C-16
C-19 COMPONENT SIDE
CONNECTORS: C-16, C-19
AC201808
1
5
2
6
7
3
8
4
9
CONNECTOR : C-34
COMPONENT SIDE
AB
C-34
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