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 Plugs, Checking
-- Reconnect the Automatic Glow Time Control Module -J179- and the Engine Control Module -J623- making sure all connection are secure before continuing Diagnosis.
-- Disconnect the T14 connector. Refer to applicable wiring diagram.
The Glow plug terminal/connector is not repairable. The harness must be replaced if damaged.
-- Using a multimeter, check the resistance of the glow plug These are identified as Q10, Q11. Q12, Q13 connector terminal to engine ground.
| T14 electrical harness connector terminal | Measure to: |
|---|---|
| 8 for Glow Plug 1 -Q10- | ground |
| 7 for Glow Plug 2 -Q11- | ground |
| 6 for Glow Plug 3 -Q12- | ground |
| 5 for Glow Plug 4 -Q13- | ground |
Specified value: 1.3 Ξ© (+/- 0.3 Ξ© at about 20Β° C).
If the specification was not obtained:Β
-- Check the glow plug or circuit for a short to voltage, open circuit or high resistance.
-- Replace the malfunctioning Glow Plug --.
If the specified value was obtained:Β
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.