Lancer L4-2.4L SOHC (2005)
2. Check that normal conditions are displayed on the items described in the table.
Q: Are normal conditions displayed on the "HEADLIGHT SW", "H/L AUTO-CUT" and "FRONT ECU ACK"?
Normal conditions are displayed for all the items : Go to Step 3.
The scan tool does not show the respective normal condition for item "HEADLIGHT SW" : Refer to Inspection Procedure M-5
"ETACS-ECU does not receive any signal from the headlight switch.
The scan tool does not show the respective normal condition for item "H/L AUTO-CUT" : Refer to Inspection Procedure I-9 "Headlight
automatic shutdown function does not work normally.
The scan tool does not show the respective normal condition for item "FRONT ECU ACK" : Replace the front-ECU. Verify that the
headlights (low-beam) illuminate normally.
STEP 3. Check the front-ECU connector A-10X for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the front-ECU connector A-10X in good condition?
YES: Go to Step 4.
NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the headlights (low-beam) illuminate normally.
STEP 4. Check the battery power supply circuit to the front-ECU. Measure the voltage at front-ECU connector A-10X.
1. Disconnect front-ECU connector A-10X and measure the voltage available at the relay box side of the connector.
