Engine JAC HFC4DA1-2C. Manual - part 83

AV

AV

AV

AV Audio/

Audio/

Audio/

Audio/Video

Video

Video

Video System

System

System

System

-122-

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

2.

No radio display with the parking lamp on.

Step

Operation

Yes

No

1

①Turn the ignition key to ACC position.

②Turn on the radio.

③Turn the parking lamp.

④Adjust the instrument panel lamp dimmer switch.

Does the fluorescent shield display of radio operate normally?

Check harness.

Go to Step 2.

2

Test the DC dimmer signal circuit for:

Open circuit

High resistance

Short circuit to ground

Poor contact

Is the fault detected and eliminated?

Go to Step 6.

Go to Step 3.

3

In the DC dimmer signal circuit, test the output DC voltage of the headlamp and
instrument panel lamp dimmer switch.

Does the voltage change with the rotation of instrument panel lamp dimmer
switch?

Go to Step 4.

Go to Step 5.

4

Replace the radio.

Is the maintenance finished?

Go to Step 6.

—

5

Replace headlamp and instrument panel lamp dimmer switch.

Is the maintenance finished?

Go to Step 6.

—

6

Operate the system to check the maintenance result.

Is the fault eliminated?

System is intact.

Go to Step 1.

AV

AV

AV

AV Audio/

Audio/

Audio/

Audio/Video

Video

Video

Video System

System

System

System

-123-

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

3.

Loudspeaker failed to operate.

Step

Operation

Yes

No

1

Does every loudspeaker fail to operate?

Go to Step 6.

Go to Step 2.

2

Regulate the radio balance and find out the suspected loudspeaker.

Does this loudspeaker operate normally?

Go to Step 3.

Go to Step 3.

3

①Remove the radio.

②Use an appropriate jumper to make instantaneous contact with the 1.5V battery
in relevant loudspeaker circuit.

Is there any bang of loudspeaker?

Go to Step 7.

Go to Step 4.

4

Test relevant loudspeaker circuit for open circuit or too high voltage.

Is the fault detected and eliminated?

Go to Step 10.

Go to Step 5.

5

Check loudspeaker for poor contact.

Is the fault detected and eliminated?

Go to Step 10.

Go to Step 8.

6

Test every loudspeaker circuit for short circuit to positive battery voltage or ground.

Is the fault detected and eliminated?

Go to Step 10.

Go to Step 7.

7

Check radio harness connector for poor contact.

Is the fault detected and eliminated?

Go to Step 10.

Go to Step 9.

8

Replace relevant loudspeaker.

If the replacement finished?

Go to Step 10.

—

9

Replace the radio.

Is the maintenance finished?

Go to Step 10.

—

10

Replace the failed system.

Does the system return to normal?

Go to Step 1.

System is intact.

AV

AV

AV

AV Audio/

Audio/

Audio/

Audio/Video

Video

Video

Video System

System

System

System

-124-

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of CD

CD

CD

CD player

player

player

player

1.

Disconnect the negative cable of battery.

2.

Remove the outer cover plate of CD player.

3.

Unscrew the mounting bolts from CD player.

4.

Disconnect the connecting wire of radio and
remove the CD player.

AV

AV

AV

AV Audio/

Audio/

Audio/

Audio/Video

Video

Video

Video System

System

System

System

-125-

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of loudspeakers

loudspeakers

loudspeakers

loudspeakers

1.

Disconnect the negative cable of battery.

2.

Remove the third and fourth rows of seat.

3.

Remove the inner trims.

4.

Remove the mounting bolts.