well being new here and first time having a D3 I have what might be a stupid question.
it is -3 outside at the moment and just gone to start the D3 to make sure the heated screen FBH etc works. so gave it 1 cycle on the glow plugs and it fired first time but then stopped straight away. I restarted it straight away without using the glow plugs again and it fired and stayed running. could this be a sign of the glow plugs on their way out or should I cycle the glow plugs twice when it is cold
6th Dec 2014 9:18 am
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
At -3 the ECM should perform a pre-heat, crank and post-heat.
SYSTEM OPERATION
There are three phases of glow plug heating: Pre heating, crank heating and post heating. The ECM determines the heating times from the Engine Coolant Temperature (ECT). The lower the ECT, the longer the heating times.
When the ignition switch is turned to position II, the ECM calculates any required heating times and, if heating is required, energizes the glow plug relays in the BJB. When pre heating is required, the ECM also sends a message to the instrument cluster, on the high speed CAN bus, to request illumination of the glow plug indicator. The glow plug indicator remains illuminated for the duration of the pre heating phase, or until the ignition switch is turned to the crank position, whichever occurs first. If required, the ECM keeps the glow plug relays energized during cranking and for the duration of any post heating phase.
The ECM monitors the drive circuit of the glow plug relays for plausibility of operation, continuity, and short and open circuits. If a fault is detected, the ECM stores a related fault code and permanently illuminates the glow plug indicator while the ignition switch is in position II.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
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