Mazda 6. Manual — part 60
EXTERIOR LIGHTING SYSTEM
T–19
T
T
Note
•
When the ignition switch is turned to ON, it is normal to hear the headlight leveling acutuator operating for
a few second, as it verifies system operating condition.
•
When driving on a consistently rough or uneven road, the auto leveling function would cause a flickering
effect for oncoming traffic. Therefore, to prevent the blinding of oncoming traffic, the auto leveling function
is slowed down.
A6E8112T118
A6E8112T119
1
Zero setting
2
Acceleration
3
Deceleration
4
Auto leveling control unit (main)
5
Auto leveling control unit (sub)
6
Front auto leveling sensor
7
Rear auto leveling sensor
8
Headlight leveling actuator (LH)
9
Headlight leveling actuator (RH)
10
ABS/TCS HU/CM or DSC HU/CM
11
Difference between two voltage signals
12
Vehicle attitude
13
Acceleration degree calculation
14
Change in vehicle speed
15
Optical axis adjustment amount
16
Optical axis
17
Zero reference
18
High
19
Low
20
Vehicle speed
21
Time
T–20
EXTERIOR LIGHTING SYSTEM
End Of Sie
AUTO LEVELING CONTROL UNIT
A6E811201052T07
Function
•
In order to prevent the blinding of oncoming traffic and improve visibility, the auto leveling control units
automatically control the optical axis direction for optimal illumination based on signal inputted from the ABS
(DSC) HU/CM and the auto leveling sensor.
•
With an on-diagnostic function included for auto leveling control unit, servicing based on display of DTCs using
the SST (WDS or equivalent) has been improved.
Structural View
Strucutre And Operation
•
The auto leveling control units (main and sub) are installed within the discharge control units, located under the
front combination lights.
•
The auto leveling control unit (main) verifies changes in vehicle speed and attitude based on signal inputted
from the ABS (DSC) HU/CM, and front and rear auto leveling sensors. The unit then calculates the optimal
direction for the optical axis and sends signal to the auto leveling control unit (sub).
•
Based on the calculation of the optical axis adjustment amount, the auto leveling control unit controls the
headlight leveling actuator.
Caution
•
After performing the following service items, configuration and zeroset must be performed using
the WDS or equivalent.
×
:Applied
—:Not applied
*1 : Execute headlight aiming for both headlights and together with headlight zeroset (which is performed by auto
leveling control unit (main))
End Of Sie
A6E8112T120
1
Auto leveling control unit (main)
2
Auto leveling control unit (sub)
Service Item
Auto Leveling
Control Unit
Configuration
Headlight
Zeroset
*
1
Headlight
Aiming
*
1
1
Auto leveling control unit (main or sub) replaced with new
part.
×
×
×
2
Front combination light removal/installation
—
—
×
3
Front auto leveling sensor or rear auto leveling sensor
replaced with new part, or harness or connector replaced
with new part.
—
×
×
4
Front auto leveling sensor connector or rear auto leveling
sensor connector removal.
—
×
×
5
Front auto leveling sensor or rear auto leveling sensor
removal/installation.
—
×
×
EXTERIOR LIGHTING SYSTEM
T–20–1
T–20
T
T–20BODY ELECTRICAL SYSTEM
ON-BOARD DIAGNOSTIC FUNCTION
A6E811201052T10
Outline
•
The on-board diagnostic function is incorporated into the auto leveling control unit (main) and auto leveling
control unit (sub). This function can narrow down headlight auto leveling system malfunction locations.
•
The on-board diagnostic function consists of the following functions: a failure detection function, which detects
malfunctions in headlight auto leveling system-related parts; a memory function, which stores detected DTCs;
a self-malfunction diagnostic function, which indicates system malfunctions using DTCs and warning lights;
and a PID/data monitoring function, which verifies the input/output condition of specific input/output signals
being read out.
•
Using an SST (WDS or equivalent), DTCs can be read out and deleted, and the PID/data monitoring function
can be activated.
Block Diagram
.
Failure Detection Function
•
The failure detection function in each headlight auto leveling system-related module detects malfunctions in
input/output signals.
•
This function outputs the DTC for the detected malfunction to the DLC-2, and also sends the detected result to
the memory function.
Memory Function
•
The memory function stores the DTC for the malfunction of input/output signals for related parts, as determined
by the failure detection function.
Self-Malfunction Diagnostic Function
•
The self-malfunction diagnostic function determines that there is a malfunction, and outputs a signal, as a DTC,
to the DLC-2. The DTC can be read out using an SST (WDS or equivalent).
EXTERIOR LIGHTING SYSTEM
9
8
7
5
4
3
10
11
6
1
2
A6E8112T555
1
Auto leveling control unit (main)
2
Auto leveling control unit (sub)
3
Front auto leveling sensor
4
Rear auto leveling sensor
5
Headlight leveling actuator (LH)
6
Headlight leveling actuator (RH)
7
ABS/TCS HU/CM or DSC HU/CM
8
LHID
9
RHID
10
DLC-2
11
WDS or equivalent
T–20–2
EXTERIOR LIGHTING SYSTEM
DTC table
PID/Data Monitor Function
•
The PID/data monitoring function optionally selects monitored input/output signal items that are set in the auto
leveling control unit (main) or the auto leveling control unit (sub), and performs read out in real time.
•
An SST (WDS or equivalent) is used to read out the PID/data monitor information.
PID/Data monitor table (LHID)
*
: Unnecessary for diagnosis
DTC Description
B1932
Auto leveling control unit system.
B2141
Configuration setting system for auto leveling control unit.
B2390
Communication system between auto leveling control unit (main) and auto leveling control unit (sub).
B2477
Auto leveling control unit setting system.
B2607
Auto leveling control unit controlling system.
B2615
Front auto leveling sensor or rear auto leveling sensors power supply system.
B2616
Front auto leveling sensor signal system.
B2619
Rear auto leveling sensor signal system.
B2626
Headlight zerosetting system for auto leveling control unit.
B2735
Headlight leveling actuator signal system.
PID name
Definition
Operation/unit
(WDS or equivalent)
CCNT
Number of continuous trouble codes
—
ONDEMDTC
Number of on-demand trouble codes
—
LHIDIGNV
Auto leveling control unit (main) input voltage
VOLTAGE
F_CAL
Signal input from front auto leveling sensor at time of headlight zeroset
(stored in memory)
VOLTAGE
F_LEVEL
Current input signal sent from front auto leveling sensor
VOLTAGE
R_CAL
Signal input from rear auto leveling sensor at time of headlight zeroset
(stored in memory)
VOLTAGE
R_LEVEL
Current input signal sent from rear auto leveling sensor
VOLTAGE
L_REFLECTOR
Headlight leveling actuator angle control output signal sent to auto leveling
control unit (sub)
ANGLE
STP_MTR_L
Headlight leveling actuator (LH) current position
STEP
LHID_VSS
Vehicle speed input signal from ABS/TCS HU/CM
KPH
PART#SUF
*
Part number identification should be displayed
—
SERIAL#1
*
Auto leveling control unit serial number part 1 should be displayed
—
SERIAL#2
*
Auto leveling control unit serial number part 2 should be displayed
—
SOFTVER
*
Software version number should be displayed
—
L_VOLT_L
Discharge headlight control (LH) input voltage
VOLTAGE
GDL_P_L
Output power to discharge headlight bulb (LH)
WATT
GDL_V_L
Output voltage to discharge headlight bulb (LH)
VOLTAGE
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