AUTOMOTIVE LIGHTING SYSTEM

Practice Sheet

Lecturer: Nguyen Quang Trai ______________________ Practice:

Group: 3___________Class: ________________ Model 2-13
Leader: Hà Phúc Duy Day: 30/11/2024

Member 1: Nguyễn Thiên Phú Time:

Member 2: Trịnh Thanh Bình Start: _____________
Member 3: Đoàn Trương Hữu Phước End: ______________
Member 4: ______________________________________

Grade Instructor's Evaluation

1. Contents
- Identify devices and systems on the model.
- Operate, test and determine operating principles, find pan.
2. Purposes
- To help students understand the basic operating principles of lighting system.
- Help students master how to use VOM meters, measure and determine the pins of
control switches and relays, ...

3. Preparation 4. Safety
- Preparation of the model. - Check battery poles before applying power
- VOM. - Do not make any additional power supplies or
- Battery. other connections on the model without the
instructor's permission.

1
5. Implementation steps
Step 1: Receive the model from the lecturer.
Step 2: Identify devices, check for abnormalities.
Step 3: Check the battery voltage (12V) and power the model.
Step 4: Confirm the operating principle.
Step 5: Follow the instruction below.

Overview image of the lighting system

2
 Details on the actual model
Symbol Detailed name
1 Tail lights front left and right
2 Headlamp (Low/High) left and right
3 Fog lights left and right
4 Left and right front turn signals
5 Tail lights rear left and right
6 Brake light
7 Reverse lights
8 Left and right rear turn signals
9 License plate light
10 BCM
11 Relay
12 IG SW
13 Shows battery voltage
14 Diagnostic jack
15 AutoLight Sensor
16 Brake switch
17 Reverse switch
18 Hazard switch
19 Multifunction switch

3
Instructions for using the lighting system model on a Kia Cerato

- Low beam: To turn on the low beam, rotate the light control knob to the "Low
Beam" position. To turn off the low beam, rotate the light control knob to the
"Off" position.
- High beam: To turn on the high beam, rotate the light control knob to the "Low
Beam" position, then push the lever down to the "High Beam" position. To turn
off the high beam, rotate the light control knob to the "Off" position
- Flash: To turn on the flash, pull the light lever up to the "Flash" position. To turn
off the flash, release the flash lever to the "Off" position.
- Tail light: To turn on the tail light, rotate the light control knob to the "Tail Light"
position. To turn off the tail light, rotate the light control knob to the "Off"
position.
- Fog light: To turn on the fog light, rotate the light control knob to the "Fog Light"
position. To turn off the fog light, rotate the light control knob to the "Off"
position.
- Automatic light: To activate the automatic light mode, rotate the light control
knob to the "Auto" position. To deactivate the automatic light mode, rotate the
light control knob to the "Off" position.
- Turn signal: To activate the left turn signal, push the turn signal lever to the left.
To deactivate the left turn signal, return the turn signal lever to the central
position. To activate the right turn signal, push the turn signal lever to the right. To
deactivate the right turn signal, return the turn signal lever to the central position.

4
 Practice: Measure the voltage of the lighting system

* Note:
- Check the battery voltage before connecting it to the model (Voltage >12V). If the
voltage is <12V, replace the battery with another one.
- Make sure you connect the negative pole of the model to the negative pole of the battery
and the positive pole of the model to the positive pole of the battery.
- The IG SW should always be in the "ON" mode when measuring voltage.
- Disconnect the power supply before measuring resistance. Use connector to measure
resistance between components on the model.
- When measuring voltage, the negative pole is always connected to the ground (GND).

Measuremen
System Condition Pin Evaluate
t (V)

OFF 4 11.6
LOW
ON 4 0

OFF 9 12.2
HEAD HIGH
ON 9 0.57

OFF 10 12.2
Multifunction
FLASH
SW 10
ON 0.16

OFF 3 11.3
AUTO
ON 3 0

OFF 1 10.9
TAIL
ON 1 0

Turn-signal OFF 11 0.03

ON-LEFT 11 11

5
 OFF 13 0.02

ON-RIGHT 13 11

OFF 6 11.32
Fog SW
ON 6 0

1 12.2
OFF
2 0
Brake SW
1 12.2
ON
2 0

1 12
OFF
2 0
Reverse SW
1 12
ON
2 0

HIGH 1 0

OFF LOW 2 0

GND 3 0
Head Lamp –
LH
HIGH 1 11.3

ON LOW 2 0.9

GND 3 0

HIGH 1 0

OFF LOW 2 0

GND 3 0
Head Lamp –
RH
HIGH 1 11.45

ON LOW 2 1.9

GND 3 0

Tail Lamp- OFF 1 0

6
 2 0

Front 1 12
ON
2 0

1 0
OFF
2 0
Tail Lamp-
Rear
1 12
ON
2 0

1 0
OFF
2 0
Fog Lamp -
RH
1 12
ON
2 0

1 0
OFF
2 0
Fog Lamp -
LH
1 12
ON
2 0

1 0
OFF
Turn Signal 2 0
Lamp
FRT/LH 1 12
ON
2 0

1 0
OFF
Turn Signal 2 0
Lamp
FRT/RH 1 12
ON
2 0

Turn Signal OFF 1 0

7
 2 0

Lamp RR/LH 1 12
ON
2 0

1 0
OFF
Turn Signal 2 0
Lamp
RR/RH 1 12
ON
2 0

1 0
OFF
Reverse 2 0

Lamp-RH 1 12
ON
2 0

1 0
OFF
Reverse 2 0

Lamp-LH 1 12
ON
2 0

1 0
OFF
Brake 2 0

Lamp-LH 1 12
ON
2 0

1 0
OFF
Brake 2 0

Lamp-LH 1 12
ON
2 0

8
Practice: Operate the system and identify pan.

Auto light circuit diagram

9
 Multifunction SW circuit diagram

Turn signal and hazard light circuit diagram

Power Supply circuit diagram

10
Multifunction SW circuit diagram

11
Brake light circuit diagram

12
Reverse light circuit diagram

13
Tail light and license plate light circuit diagram

14
Sheet no.1:
1. Turn on the pan switch 1 and identify the problems.
 Auto-light mode is not working.
2. List the possible cause of these problems.
 Auto-light sensor is not working.
 Pin 2 is not connect to ground.
3. Conduct an inspection, locate the damage, and mark on the circuit diagram.
Hint: Check the auto light sensor

4. Follow the table.

Measure the voltage.

System Condition Pin Measurement (V)

Multifunction 4 12
OFF
SW LOW
4 0
ON
15
 9 12
OFF
HIGH 0.56
HEAD ON 9

OFF 10 12
FLASH
ON 10 0.16

OFF 3 12
AUTO
ON 3 0

OFF 1 10.7
TAIL
ON 1 0

1 0
HIGH

OFF 2 0
LOW

3 0
GND
Head Lamp-LH
1 11.45
HIGH
ON 2 0.92
LOW

3 0
GND

1 0
HIGH

2 0
OFF LOW

3 0
GND

1 11.39
HIGH
Head Lamp-RH ON
2 1.7
LOW

3 0
GND

16
 1 5.07
OFF (Shine light onto
Auto Light Sensor 2 5.1
the sensor)

1 5.07
ON (Cover the sensor in
2 5.07
darkness)

5. Evaluation, Conclusion, Recommendation (If any)

 Pin 2 is not connect to ground so the Auto-Light mode is not working.

17
Sheet no.2:

1. Turn on the pan switch 2 and identify the problems.

 Head Light mode is not working.
2. List the possible cause of these problems.
 Switch is not connect to GND.
 The Head Lamp is not supplied by the battery.
 The switch is not working.
 The Head Lamp is not active.
3. Conduct an inspection, locate the damage, and mark on the circuit diagram.
 Pin 10 of M04-B to Pin 4 of the multifunction SW is open circuit.
 Pin 19 of M04-D to Pin 4 of the multifunction SW is open circuit.

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 4. Follow the table.
Measure the voltage.

System Condition Pin Measurement (V)

4 0
OFF
LOW
4 0
ON

9 12
OFF
HIGH 12
HEAD ON 9

Multifunction OFF 10 12.5

FLASH
SW
ON 10 0

OFF 3 11.6
AUTO
ON 3 0

OFF 1 11.5
TAIL
ON 1 0

1 0
HIGH

OFF 2 0
LOW

3 0
GND
Head Lamp-LH
1 0
HIGH
ON 2 0
LOW

3 0
GND
1 0
HIGH

19
 2 0
LOW
OFF
3 0
GND

1 0
HIGH
Head Lamp-RH ON
2 0
LOW

3 0
GND

5. Check the continuity

Position Results Conclusion
Pin 10 of M04-B to Pin 4 of the
0L Open circuit
multifunction SW
Pin 24 of M04-A to Pin 9 of the
2 Close circuit
multifunction SW
Pin 19 of M04-D to Pin 4 of the
0L Open circuit
multifunction SW

6. Evaluation, Conclusion, Recommendation (If any)

 Pin 10 of M04-B to Pin 4 of the multifunction SW is disconnected => Can’t
connect to the BCM
 Pin 19 of M04-D to Pin 4 of the multifunction SW is disconnected => So the
current from BCM can’t go to Light SW and connect to the GND.

20
Sheet no.3:
1. Turn on the pan switch 3 and identify the problems.
 The turn signal – RH is not working.
2. List the possible cause of these problems.
 The signal light – RH is not working.
 The Switch is not working in turn right mode.
 The signal light – RH is not connect to GND.
 The battery is not supply to the signal light – RH.
3. Conduct an inspection, locate the damage, and mark on the circuit diagram.

4. Follow the table.

Measure the voltage.

System Condition Pin Measurement (V)

Multifunction 4 0
OFF
SW LOW
4 0
ON
21
 9 12
HEAD OFF
HIGH 0.5
ON 9

OFF 10 0.2
FLASH
ON 10 0

OFF 3 12
AUTO
ON 3 0

OFF 1 12
TAIL
ON 1 0

1 12
HIGH

OFF 2 12
LOW

3 0
GND
Head Lamp-LH
1 12
HIGH
ON 2 2.7
LOW

3 0
GND

1 12
HIGH

2 12
OFF LOW
Head Lamp-RH 0
GND 3

1 12
HIGH
ON
2 2.7
LOW

22
 3 0
GND
OFF 11 0
11 12
ON-LEFT
Turn-signal
OFF 13 0

ON-RIGHT 13 0

5. Check the continuity.

Position Results Conclusion
Pin 11 / M02-L of the turn signal
switch to Pin 1 of the turn signal 1 Close circuit
light
Pin 13 / M02-L of the turn signal
switch to Pin 1 of the turn signal 1 Close circuit
light
6. Evaluation, Conclusion, Recommendation (If any)
The current from IG => (4) Hazard SW to (3) => (B) Flasher to (L) => (12) Turn signal
SW but can’t connect to (13) of TSSW => Turn right signal is not working.

23
Sheet no.4:

1. Turn on the pan switch 4 and identify the problems.

 Head Light mode is not working.
2. List the possible cause of these problems.
 Switch is not connect to GND.
 The Head Lamp is not supplied by the battery.
 The switch is not working.
 The Head Lamp is not active.
3. Conduct an inspection, locate the damage, and mark on the circuit diagram.

4. Follow the table.

Measure the voltage.

System Condition Pin Measurement (V)

Multifunction 4 0
OFF
SW LOW
4 0
ON

9 12.5
OFF
HIGH 9 12.5
ON
24
 HEAD

OFF 10
FLASH
ON 10

OFF 3
AUTO
ON 3

OFF 1 0
TAIL
ON 1 0

1 0
HIGH

OFF 2 0
LOW

3 0
GND
Head Lamp-LH
1 0
HIGH
ON 2 0
LOW

3 0
GND

1 0
HIGH

2 0
OFF LOW

3 0
GND

1 0
HIGH
Head Lamp-RH ON
2 0
LOW

3 0
GND

5. Check the continuity.

25
 Position Results Conclusion
From B+ to pin 1/M04-C of
0L Open circuit
BCM
From B+ to pin 1/M04-A of
36Ω Close circuit
BCM
From B+ to pin 4/M04-C of
3.6 Ω Close circuit
BCM
From B+ to pin 14/M04-A of
2.6 Ω Close circuit
BCM

6. Evaluation, Conclusion, Recommendation (If any)

From B+ to pin 1/M04-C of BCM is disconnected => BCM doesn’t have power to
active the Head light mode function.

26
Sheet no.5:

1. Turn on the pan switch 5 and identify the problems.

The multifunction switch is not working except turn signal.
2. List the possible cause of these problems.
The multifunction switch was not supplied by the battery
The multifunction switch is not connected GND
The wire to the lights is not working
3. Conduct an inspection, locate the damage, and mark on the circuit diagram.

4. Follow
the
table.
Measure
the voltage.

System Condition Pin Measurement (V)

Multifunction 4 12
OFF
27
 LOW

4 12
ON

9 12
HEAD OFF
HIGH 12
ON 9

OFF 10 12
SW FLASH
ON 10 12

OFF 3 12
AUTO
ON 3 12

OFF 1 12
TAIL
ON 1 12

1 0
HIGH

OFF 2 0
LOW

3 0
GND
Head Lamp-LH
1 0
HIGH
ON 2 0
LOW

3 0
GND
1 0
OFF 2 0
Tail Lamp-Front
1 0
ON 2 0
1 0
Fog Lamp -RH OFF 2 0

28
 1 0
ON 2 0
1 0
OFF 2 0
Reverse
Lamp-RH 1 12
ON
2 0

5. Check the continuity.

Position Results Conclusion
Pin 5 of the Multifunction Switch
6 CC
to the GND
Pin 2 of the Multifunction Switch
OL OC
to the GND
Pin 12 of the Multifunction
OL OC
Switch to the GND
Pin 9/M04-A of BCM to the
OL OC
GND
Pin 9/M04-B of BCM to the
10 CC
GND

6. Evaluation, Conclusion, Recommendation (If any).

Pin 2 of MS -> ground is broken -> open circuit =>
Pin 12 of the Multifunction Switch to the GND is disconnected => MSW is not
connected to the GND

29
Pin 9/M04-A of BCM to the GND is disconnected => no current from head relay to
dimmer SW

30