Fault Code 54-1985


Notes:  For 1985 models only

Description:  No fuel injector sync pickup signal during engine rotation
Power loss light:  On
Limp-in mode:  Logic module will guess at injector timing

Possible Causes

Bad connection or wiring - Check the wiring and connections between the hall effect sensor (located underneath the distributer cap) and the logic module.  Check the continuity of the two 3 conductor cables coming out of the sensor--these are prone to fatiguing and breaking inside the insulation where they exit the sensor if the cables are not properly tied down.  You may be able to resolder them.  Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Hall effect sensor failure - Check the two, flat 3 conductor cables coming out of the sensor.  These often fatigue where they exit from the sensor.  Upon replacing the sensor, make sure the cables are clipped or tied to the distributor cap shroud (or elsewhere) so they do not swing around.

Diagnostic Method

Trigger Parameters

- Engine cranking or running (signal coming from ignition reference sensor)
- No signal from the fuel injector sync pickup sensor

Results If Component Fails

Fault code 54 is stored.  The logic module will turn on the power loss light and enter limp-in mode.  The logic module will then guess at injector timing and any signal from the detonation sensor will apply to all cylinders.
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This page is maintained by Russell W. Knize and was last updated 08/28/98. Comments? Questions? Send email.

Copyright © 1996-2003 Russ W. Knize