2005 Taurus

Tiny
PISSED@FORD
  • MEMBER
  • 2005 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
My check charging system came on while relocating to a new city. It was a holiday, so I ended up replacing the battery, alternator and both battery cables. The car runs when I remove the positive battery cable, but I am still getting the check charging sys light and the batter runs down pretty quickly. I recharge it to 100 percent on my battery charger but still can't figure out the problem. Any help will be greatly appreciated.
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Sunday, January 30th, 2011 AT 7:44 PM

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Tiny
BMRFIXIT
  • EXPERT
This vehicle is equipped with a powertrain control module (PCM)-controlled charging system; the PCM determines the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator. The PCM-controlled charging system is unique in that it has two unidirectional communication lines between the PCM and the generator/regulator. Both of these communication lines are pulse-width modulated. The generator communication (GEN COM) line communicates the desired setpoint from the PCM to the voltage regulator and the generator monitor (GEN MON) line communicates the generator load and error conditions to the PCM. The third pin on the voltage regulator, the A circuit pin, is a dedicated battery voltage sense line.
Circuit 36 (YE/WH) B+ Output Terminal
The generator output voltage is supplied through the battery positive (B+) output terminal circuit 36 (YE/WH) on the rear of the generator to the battery and electrical system.
Circuit 1182 (OG/YE)
This is the A terminal battery voltage sense circuit and is used to sense battery voltage.
Circuit 1181 (GY/YE) (GEN MON)
This is the generator monitor (GEN MON) circuit. The PCM monitors this circuit to determine the generator load and error conditions to the PCM.
Circuit 3990 (LB/RD) (GEN COM)
This is the generator communication (GEN COM) circuit. The PCM determines the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator through the GEN COM circuit.
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Monday, January 31st, 2011 AT 1:47 AM

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