JAC HFC4DA1-2C engine. Service Manual - part 18

 

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JAC HFC4DA1-2C engine. Service Manual - part 18

 

 

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 65 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

4.

Ceiling lamp failed

Step

Operation

Yes

No

1

Check if the bulb filament of ceiling lamp is burnt out. Is the filament burnt out?

Go to Step 4.

Go to Step 2.

2

Is the fuse blown out?

Go to Step 5.

Go to Step 3.

3

Connect the test lamp respectively with two terminals of contact switch (left front,
right front, left rear, right rear) and terminals of lighting switch. Does the test lamp
lighten?

Go to Step 6.

Go to Step 7.

4

Replace bulb.

5

Replace fuse.

6

Replace contact switch or lighting switch.

7

Repair the circuit of poor contact.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 66 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

5.

Glove box lamp failed

Step

Operation

Yes

No

1

Is the fuse blown out?

Go to Step 3.

Go to Step 2.

2

Check if the bulb filament of glove box is burnt out. Is the filament burnt out?

Go to Step 4.

Go to Step 5.

3

Replace fuse.

4

Replace bulb.

5

Repair the circuit of poor contact.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 67 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

6.

Both high and low beams failed

Step

Operation

Yes

No

1

Set the switch to

position and the high/low beam switch to high beam

position. Is the fuse intact?

Go to Step 2.

Go to Step 3.

2

Measure the fuse voltage. Is the voltage normal?

Go to Step 7.

Go to Step 4.

3

Please replace the damaged fuse. Does it still fail after replacement?

Go to Step 7.

Go to Step 2.

4

Check the high/low beam switch. Is it normal?

Go to Step 5.

5

Check switches. Are they normal?

Go to Step 6.

6

Check wiring harness of instrument panel as per circuit diagram.

Go to Step 8.

7

Check the high beam signaling device. Does it operate normally?

Go to Step 9.

8

Check high/low beam and wiring harness connector. Are there intact?

Go to Step 9.

-

９

Check lamp connector pin. Is wire well-grounded?

Go to Step 10.

10

Disconnect the connector between high/low beam and front body harness. Is the
pin voltage normal?

Go to Step 11.

Go to Step 12.

11

Check connector for good contact and check the front body harness from
connector to lamp as per circuit diagram.

12

Check connector for good contact and check the instrument panel harness from
fuse to connector as per circuit diagram.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 68 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

7.

Only high beam failed

Step

Operation

Yes

No

1

Check if the high beam signaling device operates normally (only for high
beam)?

Go to Step 2.

Go to Step 3.

2

Check lamps and harness connectors and ensure they are normal when the
high beam position is selected.

Go to Step 3.

3

Disconnect the connector between instrument panel and front body harness. Is

the voltage normal?

Go to Step 4.

Go to Step 5.

4

Check the front body harness from connector to high beam as per circuit
diagram. Is it intact?

Go to Step 5.

5

Check the instrument panel harness from fuse to connector as per circuit
diagram.

6

Is the fuse intact?

Go to Step 7.

Go to Step 9.

7

Measure the fuse voltage. Is it normal?

Go to Step 8.

Go to Step 11.

8

Check the instrument panel harness from fuse to connector.

Go to Step 10.

９

Replace the fuse. Does it still fail after replacement?

Go to Step 8.

Go to Step 7.

10

Check connector and front body harness.

Go to Step 2.

11

Check high/low beam switch and the instrument panel harness from switch to
fuse.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 69 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

8.

Low beam failed

Step

Operation

Yes

No

1

Check lamps and wiring harness connectors. Are they intact?

Go to Step 2.

2

Is the fuse intact?

Go to Step 3.

Go to Step 8.

3

Measure the fuse voltage. Is it normal?

Go to Step 4.

Go to Step 7.

4

Check connector between instrument panel and front body harness. Is the
measured voltage normal?

Go to Step 5.

5

Check front body electric harness.

6

Check instrument panel harness.

7

Check high/low beam switch and the instrument panel harness from switch to
fuse.

8

Replace the fuse. Does it still fail after replacement?

Go to Step 4.

Go to Step 3.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 70 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

9.

Diagnostic program for front rear fog lamp

Step

Operation

Yes

No

1

Set the lamp switch to “

” position, turn on the front fog lamp

switch and check whether the switch indicator is intact.

Go to Step 7.

Go to Step 2.

2

Is the Fuse 9 intact?

Go to Step 4.

Go to Step 3.

3

Replace the damaged fuse.

Go to Step 4.

4

Remove the front fog lamp relay and measure the relay voltage. Is the voltage

normal?

Go to Step 6.

Go to Step 5.

5

Check whether the instrument panel harness and the front fog lamp switch
circuit is normal as per circuit diagram. Replace when necessary.

6

Replace relay. Are fog lamps normal?

Go to Step 7.

7

Check fog lamp connector. Are voltage and grounding normal?

Go to Step 8.

8

Check instrument panel harness from relay to fog lamp as per circuit diagram.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 71 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

10. Rear fog lamp failed with front fog lamp and rear fog lamp turned on simultaneously

Step

Operation

Yes

No

1

Turn on low beam and front fog lamp and then turn on rear fog lamp switch.
Does the switch indicator operate normally?

Go to Step 2.

Go to Step 6.

2

Check rear fog lamp and wiring harness connector. Ensure voltage and
grounding is normal.

Go to Step 3.

Go to Step 11.

３

Check connector between instrument panel and rear body harness. Is the
measured voltage normal?

Go to Step 4.

Go to Step 5.

４

Check rear body harness from connector and rear fog lamp. Repair when
necessary.

5

Check instrument panel harness from rear fog lamp switch to connector.
Repair when necessary.

6

Remove the rear fog lamp switch. Measure the voltage of wiring harness. Is
the voltage normal?

Go to Step 7.

Go to Step 8.

7

Replace the rear fog lamp switch. Is the rear fog lamp normal?

Go to Step 3.

8

Replace the relay. Is the rear fog lamp normal?

Go to Step 9.

9

Check the instrument panel harness from relay to switch. Is it normal??

Go to Step 10.

10

Check the instrument panel harness connected to rear fog lamp relay. Repair
when necessary.

11

Replace rear fog lamp.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 72 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

11. Diagnostic program for reversing lamps

Step

Operation

Yes

No

1

Is the fuse intact?

Go to Step 3.

Go to Step 2.

2

Replace the damaged fuse. Are the reversing lamps intact?

Go to Step 3.

3

Check connector between instrument panel and rear body harness. Is the
measured voltage normal?

Go to Step 4.

Go to Step 6.

4

Check connector between reversing lamp and wiring harness. Is it normal??

Go to Step 5.

Go to Step 10.

5

Check rear body harness from connector to reversing lamp.

6

Disconnect the connector of reversing lamp switch. Is the measured voltage
normal?

Go to Step 8.

Go to Step 7.

7

Check the instrument panel harness from fuse to reversing lamp switch.

8

Check the instrument panel harness from connector of reversing lamp switch
to joint. Is it normal??

Go to Step 9.

9

Check connector between brake lamps and wiring harness.

Go to Step 10.

10

Check the ground point of rear body harness. Is it well grounded?

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 73 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

12. Diagnostic program for brake lamps

Step

Operation

Yes

No

1

Turn on the ignition switch to check fuse. Is the fuse intact?

Go to Step 3.

Go to Step 2.

2

Please replace the damaged fuse. Does it still fail after replacement?

Go to Step 5.

Go to Step 3.

3

Measure the fuse voltage. Is it normal?

Go to Step 5.

Go to Step 4.

4

Check the instrument panel harness.

5

Disconnect the brake switch connector and check the brake switch. Ensure the
brake switch is normal. Is the measured voltage normal?

Go to Step 7.

Go to Step 6.

6

Check the instrument panel harness from brake switch to fuse.

7

Check connector between instrument panel and rear body harness. Is it normal??

Go to Step 8.

8

Check the rear body harness from connector to brake lamp.

Go to Step 9.

9

Check the connector between brake lamp and wiring harness.

Go to Step 10.

10

Check the ground point of rear body harness. Is it well grounded?

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 74 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

13. Hazard warning lamp failed but with normal operation of turn signal lamps

Step

Operation

Yes

No

1

Is the fuse intact?

Go to Step 3.

Go to Step 2.

2

Replace the damaged fuse. Is the hazard warning lamp normal?

Go to Step 3.

3

Remove the hazard warning switch and check if it is normal.

Go to Step 4.

4

Check if the voltage of hazard warning lamp switch is normal?

Go to Step 6.

Go to Step 5.

5

Check the instrument panel harness from fuse to hazard warning lamp switch.

6

Check the ground wire of hazard warning lamp switch. Is it normal?

Go to Step 8.

Go to Step 7.

7

Check the ground wire of instrument panel harness.

8

Check the lead from instrument panel harness to hazard warning lamp switch.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 75 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

Fault

Fault

Fault

Fault diagnosis

diagnosis

diagnosis

diagnosis

14. Turn signal lamp failed but with normal operation of hazard warning lamp

Step

Operation

Yes

No

1

Is the fuse intact?

Go to Step 3.

Go to Step 2.

2

Replace the damaged fuse. Is the turn signal lamp normal?

Go to Step 3.

3

Remove the hazard warning lamp switch and measure the switch voltage. Is the
voltage normal?

Go to Step 5.

4

Check the instrument panel harness from fuse to hazard warning lamp switch.

5

Check if the hazard warning lamp switch is normal.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 76 -

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of headlamp

headlamp

headlamp

headlamp

1.

Disconnect the negative cable of battery.

2.

Remove the front grille, front compartment panel,
and front bumper.

3.

Remove mounting bolts from headlamps.

4.

Disconnect

the

connecting

wire

to

remove

headlamps.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 77 -

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of clearance

clearance

clearance

clearance lamps

lamps

lamps

lamps

1.

Disconnect the negative cable of battery.

2.

Hold the side turn signal lamp with hands and push
it forwards, and then pull the lamp outwards with
force.

3.

Disconnect the connecting wire of clearance lamp.

4.

Remove the clearance lamp.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 78 -

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of front

front

front

front fog

fog

fog

fog lamps

lamps

lamps

lamps

1.

Disconnect the negative cable of battery.

2.

Remove the front bumper.

3.

Disconnect the connecting wire of fog lamp.

4.

Remove the front fog lamp.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 79 -

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of ceiling

ceiling

ceiling

ceiling lamps

lamps

lamps

lamps

1.

Disconnect the negative cable of battery.

2.

Remove the casing of ceiling lamp.

3.

Remove the mounting bolts from ceiling lamp.

4.

Remove the ceiling lamp.

 

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LT

LT

LT

LT Lighting

Lighting

Lighting

Lighting System

System

System

System

- 80 -

Removal/Installation

Removal/Installation

Removal/Installation

Removal/Installation

Removal

Removal

Removal

Removal of

of

of

of rear

rear

rear

rear tail

tail

tail

tail lamps

lamps

lamps

lamps

1.

Disconnect the negative cable of battery.

2.

Remove the mounting bolts from tail lamp.

3.

Disconnect the connecting wire of tail lamp.

4.

Remove the tail lamp.

 

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