Glow plug Circuit
Moderator: mikel
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Excursionist
- Posts: 93
- Joined: Thu Dec 27, 2007 7:45 pm
Glow plug Circuit
Is the glow plug circuit actually on the entire time of uploading a tune or is it just the indicator light that stays on.
02 Excursion 7.3 liter
Monster Exhaust w/Power Elbow
Big Head Wastegate
High boost wheel
AFE stage 2 Intake
Updated U7170 v-9r03
Edge Juice w/Attitude
Cal ID TNAA7Y5
Transmission Transducer, Solenoid and Springs
Monster Exhaust w/Power Elbow
Big Head Wastegate
High boost wheel
AFE stage 2 Intake
Updated U7170 v-9r03
Edge Juice w/Attitude
Cal ID TNAA7Y5
Transmission Transducer, Solenoid and Springs
RE: Glow plug Circuit
A diesel engine calibrated for California vehicles under 14,000 GVW and all Excursion vehicles utilize a Glow Plug Monitor (GPM) system designed to locate failed glow plugs or failed wiring in the glow plug system. Diagnostic Trouble Codes (DTCs) indicate which bank has failed glow plugs or failed glow plug wiring.
The California glow plug system is composed of solid state Glow Plug Control Module (GPCM), glow plugs and the associated wiring harness. The glow plug on-time is controlled by the Powertrain Control Module (PCM) and is a function of oil temperature, barometric pressure and battery voltage. The PCM enables the GPCM which drives the individual glow plugs. Glow plug on-time normal varies between 1 to 120 seconds. In addition to the PCM control, the GPCM internal limits the glow plug operation to 180 seconds regardless of PCM commanded on-time. The power to the glow plugs is provided through the GPCM solid state drivers directly from the vehicle battery. The GPCM monitors and detects individual glow plug functionality, and the control and communication links to the PCM. The failures detected by the GPCM are passed to the PCM using a serial communication signal on the diagnostic line.
Note: Wait to start lamp on time is independent from GPCM on time.
The California glow plug system is composed of solid state Glow Plug Control Module (GPCM), glow plugs and the associated wiring harness. The glow plug on-time is controlled by the Powertrain Control Module (PCM) and is a function of oil temperature, barometric pressure and battery voltage. The PCM enables the GPCM which drives the individual glow plugs. Glow plug on-time normal varies between 1 to 120 seconds. In addition to the PCM control, the GPCM internal limits the glow plug operation to 180 seconds regardless of PCM commanded on-time. The power to the glow plugs is provided through the GPCM solid state drivers directly from the vehicle battery. The GPCM monitors and detects individual glow plug functionality, and the control and communication links to the PCM. The failures detected by the GPCM are passed to the PCM using a serial communication signal on the diagnostic line.
Note: Wait to start lamp on time is independent from GPCM on time.
RE: Glow plug Circuit
Just Because the wait to start light is on does not mean the glow plugs are on. If they were you would run the risk of killing the batteries while reprogramming a vehicle.