Mazda CX 7. Manual — part 421

LIGHTING SYSTEMS

09-18–19

09-18

AUTO LIGHT SENSOR REMOVAL/INSTALLATION

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1. Disconnect the negative battery cable.
2. Remove the dashboard under cover (RH).
3. Push out the auto light sensor with connector from under the instrument panel.
4. Remove in the order indicated in the table.

.

5. Install in the reverse order of removal.

End Of Sie

AUTO LIGHT SENSOR INSPECTION

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Note

• Inspect the auto light sensor from the back side of the connector with the connector still connected.

1. Measure the voltage at auto light sensor terminal A and verify that the voltage is 5 V.
2. Shine a fluorescent light or expose the auto light sensor to natural sunlight.
3. Connect the positive (+) lead to terminal B and

the negative (

−) lead to terminal C of the auto light

sensor, and verify that the voltages are as shown
in the table.

• If the voltage is not as specified, replace the

auto light sensor.

End Of Sie

AUTO LIGHT CONTROL MODULE REMOVAL/INSTALLATION

id091800807300

1. Disconnect the negative battery cable.
2. Remove the meter hood. (See 09-17-10 METER HOOD REMOVAL/INSTALLATION.)
3. Remove the instrument cluster. (See 09-22-2 INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
4. Remove in the order indicated in the table.

5. Install in the reverse order of removal.

End Of Sie

1

Connector

2

Auto light sensor

1

2

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A

B

C

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Voltage (V)

Test condition

: Continuity

Sensor subject to fluorescent
light or natural sunlight

Sensor covered by a cloth

0.21

—

4.65

0.20 or less

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1

Screw

2

Connector

3

Auto light control module

3

1

2

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LIGHTING SYSTEMS

09-18–20

AUTO LIGHT CONTROL MODULE INSPECTION

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1. Measure the voltage at the auto light control module terminals as indicated below.
2. Disconnect the auto light control module connector before inspecting for continuity at terminals 1K, 2A, 2O and

2P.

• If not as specified, inspect the parts listed under “Action.”

• If the parts and wiring harnesses are okay but the system still does not work properly, replace the auto light

control module.

Terminal Voltage List (Reference)

Terminal

Signal

Connection

Test condition

Voltage (V)/

Continuity

Action

1A*

Power supply

DRL 15 A fuse

Constant

B+

• Inspect DRL 15 A

fuse

• Inspect related

harness

1D*

Headlight (LH)
operation
(high-beam)

Headlight (LH)
(high-beam)

Light switch at
headlight
position

Dimmer switch at
the high-beam
position

B+

• Inspect headlight

(LH)

• Inspect related

harness

Dimmer switch at
the low-beam
position

1.0 or less

1G*

Headlight (LH)
operation
(high-beam)

Headlight (LH)
(high-beam)

Light switch at
headlight
position

Dimmer switch at
the high-beam
position

1.0 or less

• Inspect headlight

(LH)

• Inspect related

harness

DRL mode

B+

1H*

Headlight (RH)
operation
(high-beam)

Headlight (RH)
(high-beam)

Light switch at
headlight
position

Dimmer switch at
the high-beam
position

B+

• Inspect headlight

(RH)

• Inspect related

harness

Dimmer switch at
the low-beam
position

1.0 or less

1K*

Ground

GND

Constant: check for continuity to
ground

Yes

Inspect GND

2A

Ground

GND

Constant: check for continuity to
ground

Yes

Inspect GND

2B

Auto light
sensor input

Auto light sensor

fluorescent light shined directly on the
auto light sensor

0.21—4.65

• Inspect auto light

sensor

• Inspect related

harness

Blocking light to auto light sensor

0.20 or less

• Inspect auto light

sensor

• Inspect related

harness

2C

IG1

METER 10 A
fuse

Ignition switch at ON

B+

• Inspect METER 10 A

fuse

• Inspect related

harness

Ignition switch at LOCK or ACC

1.0 or less

2B

*

2A

2C

2G

2H

2I

2K

2L

2M

2N

2O

2P

*

*

1A

1K

1D

AUTO LIGHT CONTROL MODULE

HARNESS SIDE CONNECTOR

*

1G

*

*

*

1H

*

*

*

2J

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LIGHTING SYSTEMS

09-18–21

09-18

*

: For vehicles with DRL only.

End Of Sie

2G

Power supply

ROOM 15 A
fuse

Constant

B+

• Inspect ROOM 15 A

fuse

• Inspect related

harness

2H

Auto light
sensor power
supply

Auto light sensor Constant

5

• Inspect auto light

sensor

• Inspect related

harness

2I*

Front fog light
relay on/off

Front fog light
relay

Light switch at
headlight
position and
dimmer switch at
LO

Front fog light
switch at ON

2.0 or less

• Inspect front fog light

relay

• Inspect related

harness

Front fog light
switch at OFF

B+

2J*

Front fog light
switch on/off

Front fog light
switch

Light switch at
headlight
position and
dimmer switch at
LO

Front fog light
switch at ON

1.0 or less

• Inspect light switch

• Inspect related

harness

Front fog light
switch at OFF

B+

2K*

High-beam on/
off

Light switch

Light switch at
headlight
position

Dimmer switch at
HI

1.0 or less

• Inspect light switch

• Inspect related

harness

Dimmer switch at
LO

B+

2L

Light switch
(Auto) signal

Light switch

Ignition switch at
ON

Light switch at
AUTO position

1.0 or less

• Inspect light switch

• Inspect related

harness

Other

B+

2M

TNS relay
operation/TNS
switch on/off

TNS relay

Ignition switch at
ON and light
switch at AUTO
position

Parking lights turn
on (Sensor voltage
is 0.3 V or less.)

1.0 or less

• Inspect TNS 15 A

fuse

• Inspect TNS relay

• Inspect related

harness

Parking lights turn
off (Sensor voltage
is 2.3 V or more.)

B+

Light switch

Ignition switch at
ON

Light switch at TNS
or headlight
position

1.0 or less

• Inspect light switch

• Inspect related

harness

Light switch at OFF
position

B+

2N

Headlight relay
operation/
headlight
switch on/off

Headlight relay

Ignition switch at
ON and light
switch at AUTO
position

Headlights (low-
beam) turn on
(Sensor voltage is
0.3 V or less.)

1.0 or less

• Inspect headlight

relay

• Inspect related

harness

Headlights (low-
beam) turn off
(Sensor voltage is
2.3 V or more.)

B+

Light switch

Light switch at headlight position

1.0 or less

• Inspect light switch

• Inspect related

harness

Light switch at OFF or TNS position

B+

2O

Ground

GND

Constant: check for continuity to
ground

Yes

Inspect GND

2P*

Parking brake
lever
depressed/
released

Parking brake
switch

Parking brake lever depressed: check
for continuity to ground

Yes

• Inspect parking

brake switch

• Inspect related

harness

Parking brake lever released: check
for continuity to ground

No

Terminal

Signal

Connection

Test condition

Voltage (V)/

Continuity

Action

LIGHTING SYSTEMS

09-18–22

AUTO LIGHT ILLUMINATION LEVEL SETTING

id091800803300

Caution

• If any of the following occurs, the sensitivity cannot be set properly. Therefore, resume from Step

1.

• Each procedure and operation interval exceeds 5 s.

• Procedures are performed incorrectly.

Note

• Perform the procedure in a condition that allows verification of the headlight illumination because it is

necessary to verify the setting condition according to the number of times headlights turn on.

1. Turn the ignition switch to the ON position with the light switch in the OFF position and pulled back (Flash-to-

pass ON).

2. Switch the light switch from the OFF to TNS position five times and return it to the OFF position.
3. Pull the light switch back once. (Flash-to-pass ON)
4. Turn the light switch to the TNS position.
5. Switch the light switch from the TNS to ON position five times and return it to the TNS position.
6. Turn the light switch to the ON position.
7. Switch the light switch from the ON to AUTO position five times and return it to the ON position.
8. Turn the light switch to the TNS position.

Note

• Switches to the sensitivity setting mode when the above operations are performed.

• The headlights turn on for the number of times according to the current setting conditions.

— Illumination (Two times): Standard sensitivity

— Illumination (Three times): Low sensitivity

9. Switch the sensitivity by pulling the light switch back (Flash-to pass ON).

10. Verify the number of times the headlights turn on and that the sensitivity is set properly.

• Illumination (Two times): Standard sensitivity

• Illumination (Three times): Low sensitivity

End Of Sie

WM: INTERIOR LIGHT

MAP LIGHT REMOVAL/INSTALLATION

id091800801200

1. Disconnect the negative battery cable.
2. Insert a scraper into the gap between the headliner and the map light.
3. Press the tab and remove the map light.

4. Disconnect the connector.
5. Remove the socket, then remove the map light

bulb.

6. Install in the reverse order of removal.

End Of Sie

TAB

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MAP LIGHT

MAP
LIGHT
BULB

SOCKET

CONNECTOR

MAP LIGHT
BULB

SOCKET

CONNECTOR

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