Galant LS V6-3.0L SOHC (1999)
Data Link Connector: Testing and Inspection
Scan Tool Communication With PCM/ECM Is Not Possible
CIRCUIT OPERATION
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A diagnostic output is made from the PCM (terminal 85) to the diagnostic output terminal (terminal 7) of the data link connector.
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When diagnostic test mode control terminal (terminal 1) of the data link connector is grounded, the PCM (terminal 84) changes to the diagnostic
test mode.
COMMENT
One of the following causes may be suspected:
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No power supply to PCM.
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Defective ground circuit of PCM.
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Defective PCM.
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Improper communication line between PCM and scan tool.
TROUBLESHOOTING HINTS
The most likely causes for this case:
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Malfunction of PCM power supply circuit.
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Malfunction of the PCM.
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Open circuit between PCM and data link connector.
WIRING DIAGRAM
