Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Glow Plug System
With the ignition switch in the "START" or "RUN" position, power flows to the glow plugs from the control module. With the engine coolant temperature below 158°F (70°C), the "Wait-to-Start" indicator will turn off, depending on engine coolant temperature. The engine can then be started.
The glow plugs continue to heat up during engine start and for a short time after the engine starts depending on coolant temperature.
If the engine is started before the "Wait-to-Start" indicator turns off, the glow plugs will continue to heat up after the engine is started. The glow plug control module has a built-in timing circuit which will turn off the glow plugs 8-13 seconds after the "Wait-to-Start" indicator turns off, if the engine has not been started. If the engine is started after this time period, the glow plugs will heat up while the engine is being started.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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