Lancer L4-2.0L (4B11) (2008)
CAN Communication Circuit (Part 3)
FUNCTION
If a short to power supply or ground is present in both CAN_H and CAN_L lines, this diagnosis result will be set.
TROUBLE JUDGEMENT CONDITIONS
If a communication flag is set for the ETACS-ECU, no communication is present through the CAN-B line, and diagnostic trouble code U0019 is set, the
ETACS-ECU determines that there is a failure.
TROUBLESHOOTING HINTS
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Malfunction of the connector (ETACS-ECU connector improperly connected)
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Malfunction of the wiring harness (CAN_H and CAN_L lines are short to power supply or ground on the CAN-B line.)
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Malfunction of ECUs
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra Fine Probe
STEP 1. Check the wiring harness between ETACS-ECU connector C-301 and body ground for a short to power supply. Measure the voltage
at ETACS-ECU connector C-301.
CAUTION:
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A digital multimeter should be used.
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The test wiring harness should be used.
1. Disconnect ETACS-ECU connector C-301, and measure the voltage at the wiring harness side of ETACS-ECU connector.
2. Turn the ignition switch to the ON position.