Lancer L4-24L SOHC (2005) Powertrain Management Computers and Control Systems Information Bus
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 "SYSTEM SELECT.
b. Select "SWS.
c. Select "PULSE CHECK.
2. When the driver's seat belt is unfastened, check if scan tool MB991958 sounds or not.
Q: Does scan tool MB991958 sound when the driver's side seat belt is unfastened?
YES: Replace the ETACS-ECU. Verify that the seat belt tone alarm function works normally.
NO: Refer to Inspection Procedure N-3 "ETACS-ECU does not receive any signal from the driver's seat belt switch."
Inspection Procedure C-1
Central Door Locking System: The central door lock system does not work at all.
