Sebring Coupe V6-3.0L VIN H (2005)
TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU illuminates the seat belt warning light according to the input signals from the following switches:
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Ignition switch (IG1)
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Driver's seat belt switch
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Speed sensor
If the seat belt warning light does not illuminate, the relevant input signal circuit, the combination meter (seat belt warning light bulb or printed-circuit
board) or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
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The driver's side seat belt switch may be defective
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The combination meter (seat belt warning light bulb or printed-circuit board) may be defective
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The ETACS-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
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MB991223: Test Harness Set
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MB991502: Scan Tool (MUT-II)
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MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Verify the method of the input signal
Q: Which is to be used, the scan tool or the voltmeter to check the input signal?
Scan tool MB991502: Go to Step 2.
Voltmeter: Go to Step 3.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the following switches:
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Ignition switch (IG1)
-
Driver's side seat belt switch
-
Speed sensor
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or
disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.
Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters?
YES: Go to Step 4.
NO:
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Scan tool MB991502 does not sound when the ignition switch is turned from "ACC" to "ON": Refer to Inspection Procedure O-2 "The ignition
switch (IG1) signal is not sent to the ETACS-ECU." See: Symptom Related Diagnostic Procedures/Diagnosis By Symptom/Symptom Diagnostic
Procedure/Inspection Procedure O-2
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Scan tool MB991502 does not sound when the driver's seat belt is unfastened: Refer to Inspection Procedure O-7 "The driver's seat belt switch
signal is not sent to the ETACS-ECU." See: Symptom Related Diagnostic Procedures/Diagnosis By Symptom/Symptom Diagnostic