Fault Code 44


Notes:  For 1985 - 1987 models only
Description:  Battery temperature sensor voltage out of range
Power loss light:  Off
Limp-in mode:  Charging voltage set to 14V

Possible Causes

Bad battery temperature sensor - This component is internal to the power module.  Verify the resistance of the sensor through the power module's pin and ground.  It should be about 10,000 ohms at 77^F.  If the component has failed, you can try to solder in a replacement, but it is likely that the entire module must be replaced.

Bad connection or wiring - Check the wiring and connections to the power module (or SMEC).  Verify the sensor resistance at the logic module (relative to ground) and that the line is being pulled up by the module when the ignition is on (around 2.5V at 77^F).

Diagnostic Method

Trigger Parameters

- Sensor voltage is less than 0.04V or greater than 4.96V.

Results If Component Fails

Fault code 44 is stored and the charging rate is set to 14.0V.  If the sensor output comes back into range, the logic module will begin using the sensor to calculate charging rates again.
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This page is maintained by Russell W. Knize and was last updated 08/28/98. Comments? Questions? Send email.

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