Mitsubishi Galant 9G. Manual — part 1567

RADIO WITH CD PLAYER

TSB Revision

CHASSIS ELECTRICAL

54A-140

INSPECTION PROCEDURE 2: When Remote Controlled Radio Power Switch is Turned "ON," no
Power is Available. But Radio, CD Player and CD Changer Power Switch is Available. <Vehicles with
Audio Amplifier>

.

RADIO, CD PLAYER
AND CD CHANGER

REMOTE CONTROLLED
RADIO SWITCH (RH)

CLOCK
SPRING

REMOTE CONTROLLED
RADIO SWITCH (LH)

Remote Controlled Radio Switch Power Supply Circuit

AC305233CB

CONNECTOR: C-117

AC305235

C-301 (B)

C-303 (GR)

C-306

AQ

CONNECTORS: C-301, C-303, C-306, C-311

C-311 (B)

RADIO WITH CD PLAYER

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CHASSIS ELECTRICAL

54A-141

CIRCUIT OPERATION

• If the remote controlled radio switch is operated,

the output voltage will change. The radio, CD
player and CD changer operates according to the
change on the voltage. You can switch on/off the
audio unit, control the mode and volume by the
remote controlled radio switch (RH). You can
select a CD track and pre-set radio station, and
tune it by the remote controlled radio switch (LH).
NOTE: You can switch on the audio unit by the
remote controlled switch, but can not switch it off.

.

TECHNICAL DESCRIPTION (COMMENT)

If the system does not recognize the remote con-
trolled radio switches (RH), the clock spring or the
radio, CD player and CD changer may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of the remote controlled radio switch

(RH)

• Malfunction of the radio, CD player and CD

changer

• Malfunction of the clock spring

• Damaged wiring harness or connectors

DIAGNOSIS

Required Special Tool:

• MB991223: Harness set

STEP 1. Measure the voltage at remote controlled radio
switch power supply circuit at the clock spring connector
C-306.
(1) Disconnect the clock spring connector C-306.
(2) Turn the ignition switch to "ON" position.

(3) Measure the voltage between clock spring connector C-306

(radio, CD player and CD changer side) terminal 2 and
ground.

• The measured value should be approximately 5 volts.

Q: Is the measured voltage approximately 5 volts?

YES : Go to Step 4.
NO : Go to Step 2.

AC305235AH

CONNECTOR: C-306

AC209365HW

CONNECTOR C-306

RADIO WITH CD PLAYER

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CHASSIS ELECTRICAL

54A-142

STEP 2. Check radio, CD player and CD changer connector
C-117 and clock spring connector C-306 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are radio, CD player and CD changer connector C-117

and clock spring connector C-306 in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The remote controlled radio switch should

work normally.

STEP 3. Check the wiring harness between radio, CD
player and CD changer connector C-117 (terminal 50) and
clock spring connector C-306 (terminal 2).
Q: Is the wiring harness between radio, CD player and CD

changer connector C-117 (terminal 50) and clock spring
connector C-306 (terminal 2) in good condition?
YES : Go to Step 4.
NO : Repair the wiring harness. The remote controlled

radio switch should work normally.

AC305233

HARNESS SIDE

CA

CONNECTOR: C-117

41

42

43

44

45

46

47

48

49

50

AC305235AH

CONNECTOR: C-306

AC305233

HARNESS SIDE

CA

CONNECTOR: C-117

41

42

43

44

45

46

47

48

49

50

AC305235AH

CONNECTOR: C-306

RADIO WITH CD PLAYER

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CHASSIS ELECTRICAL

54A-143

STEP 4. Measure the resistance at remote controlled radio
switch ground circuit to the clock spring connector C-306.
(1) Disconnect the clock spring connector C-306.

(2) Measure resistance between terminal 3 and ground.

• The measured value should be 2 ohm or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 7.
NO : Go to Step 5.

STEP 5. Check radio, CD player and CD changer connector
C-117 and clock spring connector C-306 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are radio, CD player and CD changer connector C-117

and clock spring connector C-306 in good condition?
YES : Go to Step 6.
NO : Repair or replace the component(s). Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. The

remote controlled radio switch should work normally.

AC305235AH

CONNECTOR: C-306

AC209364

CONNECTOR C-306

JT

AC305233

HARNESS SIDE

CA

CONNECTOR: C-117

41

42

43

44

45

46

47

48

49

50

AC305235AH

CONNECTOR: C-306