Home Auto Repair 1999 Mitsubishi Eclipse GS Antitheft and Alarm Systems: Initial Inspection and Diagnostic...

1999 Mitsubishi Eclipse GS Antitheft and Alarm Systems: Initial Inspection and Diagnostic Overview TROUBLESHOOTING GUIDE

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Download 1. Get a full understanding of the trouble symptoms by check the theft-alarm system,and then carry out troubleshooting. 2. The signals input to the ETACS-ECU from the switches which are related to the following systems should be normal. – Central door locking system – Headlight system – Horn system – Starting system In addition, the signals input to the ETACS-ECU from the following switches should be normal. – Hood switch – Liftgate switch – Liftgate key cylinder switch NOTE: 1. The ETACS-ECU may not accept the alarm cancelling signal under the following conditions. – If the liftgate key cylinder switch or door lock key cylinder switch is operated roughly – If these switches have been installed incorrectly or switches themselves are defective In such case, the alarm will work when the door is opened using a key. [However, when the door key cylinder switch has been shorted with the ignition switch ON, the ETACS-ECU judges the detection switch as faulty. Since then, it will prevent setting of alarm until the shorting is corrected.] 2. If the liftgate is opened using a key and is left opened when the door key cylinder switch system has a trouble (wiring harness damage, open circuit, etc.), the ETACS-ECU judges it as the liftgate holding mode and does not produce alarm even when the door is opened.