Never connect glow plug directly to car battery to test the heating performance of the glow plug. It causes damage to the glow plug.
Before removing glow plug to inspect it, be sure to check that glow plug fuse (in the engine compartment fuse & relay box) is properly connected in place. If starting the engine with the glow plug fuse improperly connected, it causes damage to the glow plug.
"Be sure to check that the engine coolant temperature is below 30°C prior to inspection. If the coolant temperature is above 30°C, incorrect resistance of the glow plug may be measured."
Remove oil from plug before measuring as glowplug resistance is very small.
Check the continuity between the terminal and body as illustrated. Replace if discontinuity or with very small or large resistance.
State | Resistance (Ω) | |
Normal | 0.4 ~ 10 [20 ~ 30 °C (68 ~ 86 °F)] | |
Open | Over 10 [20 ~ 30 °C (68 ~ 86 °F)] | |
Short | Below 0.4 [20 ~ 30 °C (68 ~ 86 °F)] | |
Turn ignition switch OFF and disconnect the battery negative (-) terminal.
Remove the harness mounting bolts (A).
Remove the control wiring harness (B) after disconnect the vacumm hose and connector.
Remove the heat protector (A) after loosening the bolts.
Remove the control harness mounting bracket (A) after loosening the bolt.
Disconnect the glow plug connector (A).
Remove the glow plug plate (B) after loosening the mounting nuts (A).
Remove the glow plug (A) from the engine.
Install in the reverse order of removal.
Glow plug plate mounting nut:
1.3 ~ 2.0 N.m (0.13 ~ 0.20 kgf.m, 0.96 ~ 1.48 lb-ft)
Glow plug:
15.0 ~ 20.0 N.m (1.5 ~ 2.0 kgf.m, 11.0 ~ 14.8 lb-ft)
