Mazda 6. Manual — part 349
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
T–147
T
TBODY ELECTRICAL SYSTEM
FOREWORD
A6E816467000W01
Outline
• The OBD (on-board diagnostic) test inspects the integrity and function of the headlight auto leveling system
and output the results when reqested by the specitic tests.
• OBD test also:
— Provides a quick inspection of the headlight auto leveling system.
— Is usually performed at the start of each deagnostic procedure.
— Provides verification after repairs to ensure that no other faults occurred during service.
• Diagnostic DTC can be read/cleared, using the SST (WDS or equivalent).
• The OBD test is divided into 3 tests:
— Read/clear diagnostic results, PID monitor and record and active command modes.
Read/clear diagnostic results
• This function allows you to read or clear DTCs in the auto leveling control unit (main) memory.
Reading DTCs Procedure Using WDS or equivalent
1. Connect WDS or equivalent to the vehicle DLC-2
16-pin connector.
2. Turn the ignition switch to ON (Engine OFF) or
start engine.
3. Retrieve DTC by WDS or equivalent.
Clearing DTCs Procedures Using WDS or equivalent
1. After repairs have been made, perform the reading DTCs procedure.
2. Turn the ignition switch to ON (Engine OFF) or start engine.
3. Erase DTC by WDS or equivalent.
4. Ensure that the customer
′s concern has been resolved.
PID/Data Monitor and Record Procedure
1. Connect WDS or equivalent to the vehicle DLC-2
16-pin connector.
2. Turn the ignition switch to ON (Engine OFF) or
start engine.
3. Access and monitor PIDs by WDS or equivalent.
Note
• The data monitor function monitors the
calculated values of input/output signals in
the auto leveling control unit (main) and the
auto leveling control unit (sub), and it does
not directly display monitored value faults as
faults in input/output parts themselves. If a
monitored value is not within the
specification it will be necessary to inspect input/output parts separately by such means as DTC
inspection or the active command modes function.
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ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
DLC-2
A6E3970W002
DLC-2
A6E3970W002
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
T–147–1
T–147BODY ELECTRICAL SYSTEM
Active Command Modes Procedure
1. Connect WDS or equivalent to the vehicle DLC-2
16-pin connector.
2. Turn the ignition switch to ON (Engine OFF) or
start engine.
3. Turn on the headlight (low-beam).
4. Activate active command modes using WDS or
equivalent.
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DTC TABLE
A6E816467000W02
• DTCs are common for present and past malfunction diagnosis.
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PID/DATA MONITOR TABLE
A6A816467000W12
LHID
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
DLC-2
A6E3970W002
DTC Description
Page
B1932
Auto leveling control unit system.
B2141
Configuration setting system for auto leveling control unit.
(See
B2390
Communication system between auto leveling control unit (main) and
auto leveling contro unit (sub).
(See
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.
(See
B2616
Front auto leveling sensor signal system.
(See
B2619
Rear auto leveling sensor signal system.
(See
B2626
Headlight zerosetting system for auto leveling control unit.
(See
B2735
Headlight leveling actuator signal system.
(See
PID Name
(Definition)
Unit/
Condition
Condition/Specification
Auto Leveling
Control Unit
(Main) terminal
CCNT
(Number of continuous codes)
—
• DTC is detected: 1—255
• DTC is not detected: 0
—
ONDEMDTC
(Number of on-demand codes)
—
• DTC is detected: 1—255
• DTC is not detected: 0
—
LHIDIGNV
(Auto leveling control unit (main) input voltage)
VOLTAGE
Ignition switch at ON:
B+
L
F_CAL
(Signal input from front auto leveling sensor at time
of headlight zeroset (stored in memory))
VOLTAGE
Ignition switch at ON:
0.5—4.5 V
—
F_LEVEL
(Current input signal sent from front auto leveling
sensor)
VOLTAGE
Ignition switch at ON:
0.5—4.5 V
G,H,K
R_CAL
(Signal input from rear auto leveling sensor at time
of headlight zeroset (stored in memory))
VOLTAGE
Ignition switch at ON:
0.5—4.5 V
—
R_LEVEL
(Current input signal sent from rear auto leveling
sensor)
VOLTAGE
Ignition switch at ON:
0.5—4.5 V
F,G,K
L_REFLECTOR
(Headlight leveling actuator angle control output
signal sent to auto leveling control unit (sub))
ANGLE
Ignition switch at ON:
-5—4
°
I
STP_MTR_L
(Headlight leveling actuator (LH) current position)
STEP
Ignition switch at ON:
12—520
Q,R,S,T
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
T–147–2
*
: Unnecessary for diagnosis
RHID
*
: Unnecessary for diagnosis
End Of Sie
LHID_VSS
(Vehicle speed input signal from ABS/TCS HU/CM)
KPH
• Vehicle is stopped: 0 KPH {0 MPH}
• Vehicle is driving: Indicates vehicle
speed
P
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
Headlight switch at ON:
B+
D
GDL_P_L
(Output power to discharge headlight bulb (LH))
WATT
Headlight switch at ON:
35—65 W
—
GDL_V_L
(Output voltage to discharge headlight bulb (LH))
VOLTAGE
Headlight switch at ON:
68—112 V
—
PID Name
(Definition)
Unit/
Condition
Condition/Specification
Auto Leveling
Control Unit
(Main) terminal
PID Name
(Definition)
Unit/Condition
Condition/Specification
Auto Leveling
Control Unit
(Sub) terminal
CCNT
(Number of continuous codes)
—
• DTC is detected: 1—255
• DTC is not detected: 0
—
ONDEMDTC
(Number of on-demand codes)
—
• DTC is detected: 1—255
• DTC is not detected: 0
—
RHIDIGNV
(Auto leveling control unit (sub) input
voltage)
VOLTAGE
Ignition switch at ON:
B+
L
R_REFLECTOR
(Headlight leveling actuator angle control
input signal sent from auto leveling
control unit (main))
ANGLE
Ignition switch at ON:
-5—4
°
P
STP_MTR_R
(Headlight leveling actuator (RH) current
position)
STEP
Headlight switch at ON:
12—520
Q,R,S,T
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_R
(Discharge headlight control unit (RH)
input voltage)
VOLTAGE
Headlight switch at ON:
B+
D
GDL_P_R
(Output power to discharge headlight
bulb (RH))
WATT
Headlight switch at ON:
35—65 W
—
GDL_V_R
(Output voltage to discharge headlight
bulb (RH))
VOLTAGE
Headlight switch at ON:
68—112 V
—
T–148
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
TBODY ELECTRICAL SYSTEM
ACTIVE COMMAND MODE TABLE
A6A816467000W13
LHID
Note
• Select the following four commands at the same time and carry out simulation inspection.
End Of Sie
DTC B1932
A6E816467000W03
Diagnostic procedure
End Of Sie
DTC B2141, B2477
A6E816467000W04
Diagnostic procedure
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ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
Command name
Definition
CALAXLSN#
Command for headlight zeroset use (See
)
Command name
Definition
Operation
Note
HDL_POS#
Select “Calibration” operation, verify that the headlight actuator
moves to the position at time of headlight zeroset
Calibration/
High/Low/Auto
Ignition key at ON
(Engine OFF), and
headlight ON
Select “High” operation, verify that headlight actuator moves
upward
Select “Low” operation, verify that headlight actuator moves
downward
Select “Auto” operation, verify that headlight actuator is under
automatic control
DTC B1932
Auto leveling control unit system.
DETECTION
CONDITION
Warning
• Incorrect servicing of the auto leveling control unit could result in electrical shock because
the unit is integrated with the discharge headlight control unit. Before servicing the auto
leveling control unit, always refer to “Discharge headlight service warnings.” (See
DISCHARGE HEADLIGHT SERVICE WARNINGS
Auto leveling control unit does not work properly.
POSSIBLE
CAUSE
• Auto leveling control unit malfunction
• Poor fit of auto leveling control unit
STEP
INSPECTION
ACTION
1
INSPECT AUTO LEVELING CONTROL
UNIT CONNECTION
• Check fit of auto leveling control unit.
• Is condition of the fit okay?
Yes
Replace auto leveling control unit.
(See
T–30 DISCHARGE HEADLIGHT CONTROL UNIT
No
After correcting fit, clear DTC and check DTC again.
• If DTC is displayed again, replace auto leveling control
unit. (See
T–30 DISCHARGE HEADLIGHT CONTROL
)
DTC B2141,
B2477
Configuration setting system for auto leveling control unit.
DETECTION
CONDITION
Warning
• incorrect servicing of the auto leveling control unit could result in electrical shock because
the unit is integrated with the discharge headlight control unit. Before servicing the auto
leveling control unit, always refer to “Discharge headlight service warnings.” (See
DISCHARGE HEADLIGHT SERVICE WARNINGS
Configuration for auto leveling control unit is not set.
POSSIBLE
CAUSE
• Configuration for auto leveling control unit is not set or the setting is invalid
ACTION
Check connections of each sensor and the unit. Then connect WDS or equivalent and perform configuration.
(See
T–30 AUTO LEVELING CONTROL UNIT CONFIGURATION
)
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