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
The control module uses various inputs to determine when glow plug operation is required. Control module uses relay to operate the glow plugs. The glow plug relay is mounted at rear of left cylinder head.
A normally operating system works as follows: at room temperature and with ignition on and engine off, the glow plugs come on for 4-6 seconds and then go off for about 3 seconds. The glow plugs then cycle on for about 1.0 second and off for about 4.5 seconds, for a total start sequence of about 16 seconds. If the engine is cranked during or after start sequence, the glow plugs will cycle on and off for a total of 16 seconds after the ignition switch is returned from the crank position, whether engine starts or not.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.