ON-BOARD DIAGNOSTIC FUNCTION [AUTO LEVELING CONTROL MODULE]
id0918001077b0
Outline
• The on-board diagnostic function is incorporated into the auto leveling control module (main) and auto leveling control module (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).
DTC table
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DTC
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Description
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B1932
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Auto leveling control unit system.
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B2141
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Configuration setting system for auto leveling control module.
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B2390
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Communication system between auto leveling control module (main) and auto leveling control module (sub).
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B2477
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Auto leveling control unit setting system.
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B2607
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Auto leveling control unit controlling system.
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B2615
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Front auto leveling sensor or rear auto leveling sensors power supply system.
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B2616
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Front auto leveling sensor signal system.
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B2619
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Rear auto leveling sensor signal system.
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B2626
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Headlight zerosetting system for auto leveling control module.
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B2735
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Headlight leveling actuator signal system.
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PID/Data Monitor Function
• The PID/data monitoring function optionally selects monitored input/output signal items that are set in the auto leveling control module (main) or the auto leveling control module (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)
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PID name
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Definition
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Operation/unit
(WDS or equivalent)
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CCNT
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Number of continuous trouble codes
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-
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ONDEMDTC
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Number of on-demand trouble codes
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-
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LHIDIGNV
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Auto leveling control unit (main) input voltage
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VOLTAGE
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F_CAL
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Signal input from front auto leveling sensor at time of headlight zeroset (stored in memory)
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VOLTAGE
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F_LEVEL
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Current input signal sent from front auto leveling sensor
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VOLTAGE
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R_CAL
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Signal input from rear auto leveling sensor at time of headlight zeroset (stored in memory)
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VOLTAGE
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R_LEVEL
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Current input signal sent from rear auto leveling sensor
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VOLTAGE
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L_REFLECTOR
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Headlight leveling actuator angle control output signal sent to auto leveling control module (sub)
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ANGLE
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STP_MTR_L
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Headlight leveling actuator (LH) current position
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STEP
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LHID_VSS
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Vehicle speed input signal from ABS/TCS HU/CM
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KPH
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PART#SUF*
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Part number identification should be displayed
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-
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SERIAL#1*
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Auto leveling control unit serial number part 1 should be displayed
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-
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SERIAL#2*
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Auto leveling control unit serial number part 2 should be displayed
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-
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SOFTVER*
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Software version number should be displayed
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-
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L_VOLT_L
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Discharge headlight control (LH) input voltage
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VOLTAGE
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GDL_P_L
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Output power to discharge headlight bulb (LH)
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WATT
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GDL_V_L
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Output voltage to discharge headlight bulb (LH)
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VOLTAGE
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-
* :
Unnecessary for diagnosis
PID/Data monitor table (RHID)
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PID name
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Definition
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Operation/unit
(WDS or equivalent)
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CCNT
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Number of continuous trouble codes
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-
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ONDEMDTC
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Number of on-demand trouble codes
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-
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RHIDIGNV
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Auto leveling control unit (sub) input voltage
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VOLTAGE
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R_REFLECTOR
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Headlight leveling actuator angle control input signal sent from auto leveling control module (main)
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ANGLE
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STP_MTR_R
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Headlight leveling actuator (RH) current position
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STEP
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PART#SUF*
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Part number identification should be displayed
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-
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SERIAL#1*
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Auto leveling control unit serial number part 1 should be displayed
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-
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SERIAL#2*
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Auto leveling control unit serial number part 2 should be displayed
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-
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SOFTVER*
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Software version number should be displayed
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-
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L_VOLT_R
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Discharge headlight control unit (RH) input voltage
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VOLTAGE
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GDL_P_R
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Output power to discharge headlight bulb (RH)
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WATT
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GDL_V_R
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Output voltage to discharge headlight bulb (RH)
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VOLTAGE
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-
* :
Unnecessary for diagnosis
Active Command Modes Function
• The simulation function optionally selects simulation items for output related parts that are set in the auto leveling control module (main), and operates the output related parts independent of the auto leveling control module (main).
• An SST (WDS or equivalent) is used to activate this function.
Active Command Modes Table (LHID)
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Command Name
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Definition
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Operation
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Note
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CALAXLSN#
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Command for headlight zeroset use
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ON/OFF
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Ignition key at ON (Engine off), and headlight ON
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HDL_POS#
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Calibration: Moves headlight actuator to position at time of headlight zeroset
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Calibration/Low/High/Auto
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Low: Moves headlight actuator in downward direction
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High: Moves headlight actuator in upward direction
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Auto: Performs automatic control (Headight leveling actuator is contralled by auto leveling control module (main))
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