Eclipse L4-2.4L SOHC (2004)
Q: Does the scan tool display "IG SW (IG1)" as normal condition?
YES: Go to Step 3.
NO: Refer to Inspection Procedure O-2 "ETACS-ECU does not receive a signal from the ignition switch (IG1)."
STEP 3. Check the input signal (by using the Pulse check mode of the monitor).
Check input signal from the driver's side seat belt switch.
1. Operate scan tool MB991958 according to the procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."
2. When the driver's seat belt is fastened, check if scan tool MB991958 sounds or not.
Q: Does scan tool MB991958 sound when the driver's side seat belt is fastened?
YES: Go to Step 4.
NO: Refer to Inspection Procedure P-3 "ETACS-ECU does not receive a signal from the driver's side seat belt switch."
STEP 4. Check at ETACS-ECU connector C-118 in order to check the ground circuit to the seat belt warning light.
1. Disconnect ETACS-ECU connector C-118, and measure at the wiring harness side.
2. Turn the ignition switch to the "ON" position.
