Lancer L4-2.4L SOHC (2005)
Information Bus: Component Tests and General Diagnostics
How to Check ECUs
HOW TO CHECK ECUS
1. Use the scan tool MB991958 and the SWS monitor kit to check ECUs.
2. The following ECUs can be checked by using the scan tool MB991958 and the SWS monitor kit.
NOTE: The "ECU COMM Check" function checks the communication status of ECUs. "NG" does not always mean ECU malfunction. If a malfunction
is found by the "ECU COMM Check", proceed to "Symptom Procedure".
NOTE:
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*1: If the ignition switch is turned to the "LOCK" (OFF) or "ACC" when "NG" is displayed beside the "ETACS ECU" or the signal request line is
abnormal, the scan tool shows "NG" beside the "COLUMN ECU".
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*2: When "NG" is displayed beside the "ETACS ECU", the scan tool shows "NG" beside the "FRONT ECU" and "SUNROOF ECU".
Pulse Check
PULSE CHECK
1. The input signals (signals other than SWS communication line signals), which are compatible with the SWS monitor by using the scan tool or
voltmeter, can be confirmed by the Pulse Check.
2. Use the scan tool or voltmeter to check the following input signals.
NOTE: If a problem is found the Pulse Check, proceed to the Problems during Input Signal Check <Scan tool or voltmeter>. See: Symptom
Related Diagnostic Procedures/Input Signal Chart
