Lancer L4-2.0L (4B11) (2008)
YES : Go to Step 2.
NO : Use the ETACS-ECU configuration function to set the "Interior light auto cut timer" to other than "0 min" See: Body and Frame/Body
Control Systems/Body Control Module/Testing and Inspection/Programming and Relearning
STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code.
Check if DTC is set to the ETACS-ECU.
1. Turn the ignition switch to the "ON" position.
2. Check whether the ETACS-ECU DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU. Refer to ETACS, Diagnosis. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Descriptions/ETACS
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to the interior light auto-cut function.
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Turn the ignition switch to the "ACC" position.
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Turn the ignition switch to the "LOCK" (OFF) position.
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Open each door.
Q: Does scan tool MB991958 display the items "IG voltage", "ACC switch", "As door ajar switch", "RR door ajar switch", and "RL door ajar switch"
as normal condition?
YES : (Normal conditions are displayed for all items.) Go to Step 4.
NO : (Normal condition is not displayed.) Troubleshoot the ETACS-ECU. Refer to ETACS, Diagnosis, Input signal chart See: Body and
Frame/Body Control Systems/Body Control Module/Testing and Inspection/Symptom Related Diagnostic Procedures/Trouble Symptom Chart
STEP 4. Retest the system.
Check that the interior light automatic shutdown function works normally.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction (Refer to general (Body and Chassis) How to use Troubleshooting/inspection Service Points,
How to Cope with Intermittent Malfunction).
NO : Replace the ETACS-ECU.