[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54A-CHASSIS ELECTRICAL > HEADLAMP > SYMPTOM PROCEDURES > AUTOMATIC LIGHTING FUNCTION DOES NOT WORK NORMALLY.
Inspection Procedure 6: The auto lamp function does not work normally.
 
 
caution
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
 
 
 
 
OPERATION
The ETACS-ECU operates this function in accordance with the input signals from driving distance, lighting control sensor, and column switch (auto lamp switch). Also, when the column switch (lighting switch) is in the "AUTO" position, and when an abnormality is present to the auto lamp circuit, the fail-safe function is activated and the low beam is turned ON at all times regardless of the brightness around the vehicle.
 
 
COMMENTS ON TROUBLE SYMPTOM
If the auto lamp function does not work normally, the above input signal circuit(s) or the ETACS-ECU may have a problem.
 
 
PROBABLE CAUSES
  • Malfunction of the lighting control sensor
  • Malfunction of the column switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics
Use the M.U.T.-IIISE to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
 
STEP 2. M.U.T.-IIISE diagnosis code
Check if diagnosis code is set in the LIN.
Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 3.
 
STEP 3. M.U.T.-IIISE other system diagnosis code
Check if diagnosis code is set in the ETACS-ECU.
Is the diagnosis code set?
Troubleshoot the ETACS-ECU (Refer to ).
Go to Step 4.
 
STEP 4. M.U.T.-IIISE data list
Use the ETACS-ECU service data to check the signals related to the operation of auto lamp function.
  • Turn the lighting switch to the "AUTO" position.
 
Item No.Item nameNormal condition
22Headlamp switch (Auto)ON
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 5.
Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 11 "The column switch signal is not received" .
 
STEP 5. Lighting control sensor check
Check the lighting control sensor. Refer to .
Is the check result normal?
Go to Step 6.
Replace the lighting control sensor.
 
STEP 6. Retest the system
Check that the auto lamp function works normally.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.