17611 2003-2004 CROWN VICTORIA POLICE INTERCEPTOR - LOW CHARGING SYSTEM VOLTAGE AFTER EXTENDED IDLE
SOME 2003-2004 CROWN VICTORIA POLICE INTERCEPTOR VEHICLES MAY EXHIBIT LOW CHARGING SYSTEM VOLTAGE AND/OR A DEAD BATTERY AFTER PROLONGED IDLE WITH ACCESSORIES ON. TO SERVICE, REPROGRAM THE POWERTRAIN CONTROL MODULE (PCM) TO THE LATEST CALIBRATION LEVEL USING WDS RELEASE B29.9 OR HIGHER. THE NEW CALIBRATION RAISES THE BASE DRIVE IDLE FROM 544 TO 600 RPM, NEUTRAL IDLE REMAINS AT 800 RPM. THE NEW CALIBRATION ALSO DETECTS WHEN THE BATTERY VOLTAGE DROPS BELOW 11.8 VOLTS DURING AN EXTENDED IDLE AND WILL RAMP THE IDLE SPEED UP TO MAINTAIN BATTERY CHARGE. IN NEUTRAL THE IDLE SPEED WILL SLOWLY RAMP UP TO 1100 RPM. IN DRIVE THE IDLE SPEED WILL SLOWLY RAMP UP TO 800 RPM. THE IDLE SPEED WILL RETURN TO THE BASE VALUES (600 IN DRIVE, 800 IN NEUTRAL) WHEN THE BATTERY VOLTAGE RETURNS TO 12.5 VOLTS OR HIGHER.
EFFECTIVE DATE: 03/09/2004