Civic L4-1668cc 1.7L SOHC MFI (2003)
Information Bus: Testing and Inspection
Multiplex Control Unit Input Test
Multiplex Control Unit Input Test
1. Remove the dashboard lower cover.
2. Unbolt the under-dash fuse/relay box and pull it down.
NOTE: All connectors are wire side of female terminals.
3. Inspect the connector and socket terminals to be sure they are all making good contact.
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If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
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If the terminals look OK, go to step 4.
4. With the connectors still disconnected, make these input tests at the connector.
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If any test indicates a problem, find and correct the cause, then recheck the system.
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If all the input tests prove OK, go to step 5.