Lancer L4-2.4L (4B12) (2009)
Q: Is the wiring harness between ETACS-ECU connector C-317 (terminal 7) and ignition switch (ACC) in good condition?
YES : Go to Step 5.
NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the
connector. Repair the wiring harness as necessary. Check that the input signal of ignition switch (ACC) is normal.
STEP 5. Using scan tool MB991958, check data list.
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Ignition switch: ACC
OK: Normal condition is displayed.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction.
NO : Refer to Inspection Procedure 2 "Defective power supply system of the ignition switch". See: Ignition System/Sensors and Switches -
Ignition System/Ignition Switch/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptom Procedures/Inspection Procedure 2
Inspection Procedure 2
Inspection Procedure 2: ETACS-ECU does not receive any signal from the ignition switch (IG1).
Ignition Switch (IG1) Input Circuit (Part 1)
Ignition Switch (IG1) Input Circuit (Part 2)
TECHNICAL DESCRIPTION (COMMENT)
If there is an error to the ignition switch (IG1) input signal, or the IG1 relay inside the ETACS-ECU does not operate, the ignition switch (IG1) signal is
no longer output to the communication line.