Eclipse V6-3.8L (6G75) (2006)
FUNCTION
The diagnostic result demonstrates that "the scan tool cannot receive the sent data from the A/C-ECU" when the scan tool MB991958 checks the
periodically sent data from each ECU and cannot receive the A/C-ECU data only.
TROUBLE JUDGEMENT CONDITIONS
Scan tool MB991958 judges the trouble when the periodically sent data from A/C-ECU cannot be received and sent.
TROUBLESHOOTING HINTS
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The wiring harness may be defective [open circuit between A/C-ECU and joint connector (3)]
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The connector may be defective [poor connection of joint connector (3) or A/C-ECU connector]
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Power supply circuit malfunction of the A/C-ECU
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The A/C-ECU may be defective
DIAGNOSIS
Required Special Tools:
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MB991223: Harness Set
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MB992006: Extra fine probe
STEP 1. Check joint connector (3) C-03 and A/C-ECU connector C-14 <manual air conditioning system> or C-15 <automatic air conditioning
system> 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 (4.0 inches) from the connector.
Check the joint connector at the wiring harness side for loose, corroded or damaged terminals, or terminals pushed back in the connector, and also check