6.
When the voltage or continuity time is not normal, check the terminal voltage in glow control unit, and single parts.
Conditions before inspection :
Battery voltage : 12V
Cooling water temperature : Below 30℃ (86°F)
(Disconnect the water temperature sensor connector).
Reconnect the water temperature sensor connector after inspection.
Connect voltmeter between glow plug plate and plug body (ground).
Check indicated value on voltmeter with ignition switch ON.
Check that preheat indication lamp lights for about 6 seconds and indicates battery voltage (about 9V or over) for about 36 seconds immediately after ignition switch is turned on. [At cooling water temperature 20°C (68.0°F)]
Continuity time varies depending upon cooling water temperature.
After checking 3, set ignition switch at START position.
The system is normal if battery voltage (about 9V or over) is generated for about 6 seconds during engine cranking and after start operation. [at cooling water temperature 20°C (68.0°F)]
When the voltage or continuity time is not normal, check the terminal voltage in glow control unit, and single parts.
Check the continuity between the terminal and body as illustrated. Replace if discontinuity or with large resistance.
Standard value :
Metal : 0.45Ω / 0.8Ω
Ceramic : 0.8Ω
Remove oil from plug before measuring as glowplug resistance is very small.
Check for rust on glow plug plate.
Check glow plug for damage.
Remove the glow plug relay (A).
Inspect the relay continuity.
Using an ohmmeter, check that there is continuity between terminals 2 and 4.
If there is no continuity, replace the relay.
Check that there is no continuity between terminals 1 and 5.
If there is continuity, replace the relay.
Inspect the relay operation.
Apply battery positive voltage across terminals 2 and 4.
Using an ohmmeter, check that there is continuity between terminals 1 and 5.
If there is no continuity, replace the relay.
Install the glow plug relay.
