Lancer LS L4-2.0L SOHC (2002)
Hazard Warning Light Circuit
CIRCUIT OPERATION
If the ETACS-ECU receives "ON" signal from the hazard warning light switch, the ETACS-ECU turns on the flasher timer (incorporated in the
ETACS-ECU), thus causing the turn-signal lights to flash.
TECHNICAL DESCRIPTION (COMMENT)
If the hazard warning lights do not flash, the power supply line to the ETACS-ECU (dedicated to the turn-signal lights) or the ETACS-ECU may be
defective.
TROUBLESHOOTING HINTS
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Malfunction of the hazard warning light switch
-
Malfunction of the ETACS-ECU
-
Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
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MB991223: Test Harness Set
-
MB991502: Scan Tool (MUT-II)
STEP 1. Check the turn-signal lights.
Q: Do the turn-signal lights illuminate normally?
YES: Go to Step 2.
NO: Refer to Inspection Procedure J-1 "Turn-signal lights does not flash when the turn-signal light switch is turned on."
