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Home >> Ford >> 2003 >> Excursion 5.4 L, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - System & Component Testing - 7.3L Diesel) >> Hard Start/No-Start Diagnostic Procedures >> Test 10: Glow Plug System Operation >> Recommended Procedure (California)
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Recommended Procedure (California)

WARNING: This page is about a different variant/trim than selected.
NOTE: Glow plug system monitor will start when glow plugs are commanded on for over 30 seconds and battery voltage is 10-14 volts. A glow plug DTC will be stored in Continuous Memory if one or more glow plugs are not being powered. Look very carefully for poor connections, burnt or loose fitting pins that will cause high resistance and set a DTC.

Glow Plug Monitor Self-Test, is a KOER functional test of glow plug system performed on demand with engine running and A/C off. PCM will activate GPCM which monitors glow plug operation. Accelerator pedal may be used to increase engine speed to increase voltage if needed. A fault must be present at time of testing for test to detect a fault. DTCs will be sent from GPCM to PCM through Standard Corporate Protocol (SCP) line, then output to scan tool.

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