Eclipse V6-3.0L SOHC (2003)
When the theft-alarm system is triggered, the ETACS-ECU sounds the theft-alarm horn and all the vehicle horns.
TECHNICAL DESCRIPTION (COMMENT)
If the theft-alarm horn and the vehicle horns do not sound when the theft-alarm system is triggered, the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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Malfunction of the theft-alarm horn
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Malfunction of the horn
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Malfunction of the theft-alarm horn relay
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Malfunction of the horn relay
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Malfunction of the ETACS-ECU
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Damaged harness wires or connectors
DIAGNOSIS
Required Special Tool:
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MB991223: Test Harness Set
STEP 1. Check which horn is defective.
Check which horn does not sound when the theft-alarm system is triggered.
Q: Which horn does not sound?
Theft-alarm horn : Go to Step 2.
horn : Go to Step 12.
theft-alarm horn and all vehicle horns : Replace the ETACS-ECU. All the vehicle horn (including the theft-alarm horn) should sound when the
theft-alarm system is triggered.
STEP 2. Check the theft-alarm horn.
1. Remove the horn.
2. Connect the battery as shown, and check that the theft-alarm horn sounds.
Q: Does the theft-alarm horn sound?
YES: Go to Step 3.
NO: Replace the theft-alarm horn. All the vehicle horn (including the theft-alarm horn) should sound when the theft-alarm system is triggered.
