Fault Code 42-SMEC
Notes: For models using the SMEC (most 1988 and later)
Description: No voltage detected at ASD
(automatic shutdown) relay output
Power loss light: Off
Limp-in mode: None
Blown fusible link to power module (or SMEC) - Check the only white
fusible link (may look grey if dirty) by tugging on it. A good link
will feel solid while a blown link will stretch like a rubber band.
It is the white link on the two-link circuit (not the four or five link
circuit). This link supplies power to the ASD relay and the voltage
sense input on the logic module (may be accompanied by a code 16).
See the Fusible Links page for more
Bad connection or wiring - Check the wiring and connections between
the ASD relay and the logic module. Clean and regrease any corroded
connectors with dielectric grease and repair any shorts.
ASD relay failure - Disconnect the relay, apply 12V to the relay
coil, and check the contacts
- Near 0V or near 12V not detected when the relay is turned on or off,
- 12V not detected at output of ASD relay
Results If Component Fails
Fault code 42 is stored.
This page is maintained by Russell W. Knize and was last updated 08/28/98.
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Copyright © 1996-2003 Russ W. Knize