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
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 afterignitionswitch is turned on. [At cooling water temperature 20°C (68°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 generatedforabout 6 seconds during engine cranking and after start operation. [at coolingwater temperature 20°C (68°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. Replaceif discontinuity or with large resistance.
Standard value : 0.25Ω
Remove oil from plug before measuring as glow plug resistance is verysmall.
Check for rust on glow plug plate.
Check glow plug for damage.
Remove the glow plug relay.
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.
