Lancer L4-2.0L (4B11) (2008)
3. Diagnose CAN bus lines, and check if the scan tool screen is as shown in the illustration.
Q: Does the scan tool screen correspond to the illustration?
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.
Diagnostic Item 2
DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU
CAUTION: When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a
component connected to the CAN bus line may be broken.
FUNCTION
When the CAN bus diagnosis is carried out, the scan tool sets communication "OK" flags in the patch between the ETACS-ECU and active other ECUs.
If a commutation "OK" flag is not set for the ECUs other than the ETACS-ECU, this diagnosis result will be set.
TROUBLE JUDGEMENT CONDITIONS
If no communication flags are set for the ECUs (on the CAN-B or CAN-C lines) other than the ETACS-ECU, the ETACS-ECU determines that there is a
failure.
TROUBLESHOOTING HINT
Malfunction of the ETACS-ECU
DIAGNOSIS
Required Special Tools:
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MB991958: Scan Tool (M.U.T.-III Sub Assembly)
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MB991824: Vehicle Communication Interface (V.C.I.)
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MB991827: M.U.T.-III USB Cable
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MB991910: M.U.T.-III Main Harness A
Recheck for other system diagnostic trouble code.