Eclipse V6-3.8L (6G75) (2006)
Part 2
FUNCTION
The scan tool MB991958 judges a short between CAN_H and CAN_L line when all data from ECU cannot be received while checking periodically sent
data from each ECU even if the voltage is normal.
TROUBLE JUDGEMENT CONDITIONS
The scan tool MB991958 judges the trouble when it is impossible to send and receive the all ECU periodically sent data and the voltage of CAN_H and
CAN_L line is 4.0 volts or less and 1.0 volt or more.
TROUBLESHOOTING HINTS
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The wiring harness may be defective [a short between CAN_H and CAN_L line, open circuit between the data link connector and the joint
connector (3) or open circuit between the combination meter connector and the joint connector (3)]
NOTE: The scan tool MB991958 cannot receive all the periodically sent data from each ECU by the open circuit of harness between the data link
connector and the joint connector (3). In addition, the scan tool MB991958 measures the voltage itself and shows 2.5 voltsdue to the open circuit
of harness. Therefore, it is judged as a short between CAN_H and CAN_L line.
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The connector may be defective (short in the connector)
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Each ECU may be defective (short between CAN_H and CAN_L line)
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra fine probe
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MB991970: ABS Check Harness