Mazda CX-5 Service & Repair Manual: Auto Light Sensor
Purpose
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The auto light sensor detects the illumination level above and in front of the vehicle and outputs it to the front body control module (FBCM).
Function
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The auto-light sensor uses the upward illumination level sensor to detect the illumination level above the vehicle, and uses the forward illumination level sensor to detect the illumination level in front of the vehicle.
Illumination level adjustment function
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The illumination level can be switched through 5 levels by using the Mazda Modular Diagnostic System (M-MDS) or the audio unit (with color LCD)..
On-board diagnostic function
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If there is a malfunction in the auto light sensor, notifies the front body control module (FBCM) and detects a DTC from the front body control module (FBCM).
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For details on DTCs, refer to the diagnostic system (front body control module (FBCM)), DTC table (front body control module (FBCM)) in the Workshop Manual.
Construction
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The auto-light sensor is integrated with the rain sensor as a single unit.
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The auto light sensor consists of lens, forward illumination level sensor (photodiode), upward illumination level sensor (photodiode), and microcomputer.
Operation
CAUTION:
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Correct illumination level detection is not be possible under the following conditions and could cause the system to operate incorrectly.
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Stickers or labels are attached to the auto-light sensor area on the windshield.
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Dirt is adhering to the the auto-light sensor area on the windshield.
1. The auto light sensor detects the illumination level above and in front of the vehicle when the ignition is switched ON and the light switch is operated to the AUTO position.
2. The auto light sensor outputs a headlight (LO) on signal to the front body control module (FBCM) according to the detected illumination level.
Fail-safe
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Function not equipped.
Adaptive Front Lighting System (Afs) Off Switch Inspection
1. Disconnect the negative battery cable..
2. Remove the switch panel..
3. Verify that the resistance between AFS OFF switches B and C is as indicated
in the table.
If the resist ...
Back Up Light Switch Inspection
1. Disconnect the negative battery cable..
2. Remove the front under cover No.2..
3. Remove the back-up light switch..
4. Verify that the continuity between the back-up light switch terminals is ...
Other materials:
Door Locks
WARNING
Always take all children and pets with you or leave a responsible person with
them:
Leaving a child or a pet unattended in a parked vehicle is dangerous. In hot
weather, temperatures inside a vehicle can become high enough to cause brain damage
or even death.
Do not leave the key in ...
Headlight Auto Leveling System Initialization
NOTE:
The AFS control module records the vehicle height while it is unoccupied
by performing the headlight auto leveling system initial setting.
Perform headlight auto leveling system initial setting if any of the following
work is performed.
AFS control module rep ...
Auto Light System
Outline
The auto light system automatically turns the TNS and headlights on/off according
to the illumination level above and in front of the vehicle.
The auto light system is controlled by the front body control module (FBCM).
The front body control module (FBCM) performs ...
