Eclipse RS L4-2350cc 2.4L SOHC MFI (2002)
STEP 21. Check the input signal by using the Pulse check.
Check the input signal of the trunk lid latch switch <vehicles with theft-alarm system> or trunk light switch <vehicles without theft-alarm system>.
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. When the trunk lid is opened and closed, check if scan tool MB991502 sounds or not.
Q: When the trunk lid is opened and closed, does scan tool MB991502 sound?
YES: Replace the ETACS-ECU. Check that the trunk lights illuminate normally.
NO: Refer to Inspection Procedure P-9 "ETACS-ECU does not receive a signal from the trunk lid latch switch."
Inspection Procedure M-3
Dome light: Dome Light Dimming Function does not Work Normally.
NOTE: This troubleshooting requires use of scan tool MB991502 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer
to "How to use SWS monitor."
Interior Light Dimming Function
CIRCUIT OPERATION
The ETACS-ECU operates the dome light dimming function according to the input signals from the following switches:
-
Ignition switch (IG1): OFF
-
Key reminder switch: ON
-
Front door switches: OFF
-
Driver's door lock actuator switch: LOCK or UNLOCK
TECHNICAL DESCRIPTION (COMMENT)
Is the dome lights do not dim normally, the input circuits from the switches described in "CIRCUIT OPERATION" or the ETACS-ECU may be
defective.
TROUBLESHOOTING HINTS