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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1059 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550)) >> Pinpoint Test AF: Glow Plug System >> Introduction >> Description

Pinpoint Test AF: Glow Plug System: Introduction: Description

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The glow plug system is composed of a solid state glow plug control module (GPCM) and the glow plugs. The GPCM provides direct battery voltage to the glow plugs. The GPCM monitors the individual glow plug operation. Faults detected by the GPCM are transmitted to the PCM using a serial communication signal on a diagnostic line.

The powertrain control module (PCM) enables and controls the GPCM. The glow plug ON time is a function of oil temperature, barometric pressure, and battery voltage. The ON time normally varies between 1 to 120 seconds and is limited by the GPCM to 180 seconds regardless of PCM commands.

NOTE: Wait-to-Start indicator ON time is independent from GPCM ON time.
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