Lancer L4-2.0L (4B11) (2008)
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Malfunction of the connector (data link connector or ETACS-ECU connector improperly connected)
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Malfunction of the wiring harness (open circuit, short to ground, short to power supply between the data link connector and the ETACS-ECU
connector, line-to-line short, or power supply to the ETACS-ECU)
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Malfunction of ETACS-ECU
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra Fine Probe
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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
STEP 1. Check data link connector C-34 and ETACS-ECU connector C-301 for loose, corroded or damaged terminals, or terminals pushed
back in the connector.
CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector.
Q: Are data link connector C-34 and ETACS-ECU connector C-301 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
STEP 2. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
CAUTION: Strictly observe the specified wiring harness repair procedure.
1. Disconnect the scan tool and ETACS-ECU connector C-301, and check the wiring harness.
2. Check the wiring harness between data link connector C-34 (terminal 6) and ETACS-ECU connector C-301 (terminal 5) <CAN_H>
3. Check the wiring harness between data link connector C-34 (terminal 14) and ETACS-ECU connector C-301 (terminal 4) <CAN_L>
Q: Is the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 in good condition?
YES : Go to Step 3.
NO : Repair the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
STEP 3. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 for a short to ground. Measure the
resistance at data link connector C-34.
CAUTION:
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Disconnect the negative battery terminal.
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A digital multimeter should be used.
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The test wiring harness should be used.
1. Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-34.
2. Measure the resistance between data link connector terminal 6 and body ground. <CAN_H>
OK: 1 kilo ohm or more