Connect GDS to Data Link Connector (DLC).

Warm engine up to normal operating temperature.

Turn "OFF" electrical devices and A/C.

Monitor "GLOW RELAY" parameter on the GDS.

Fig.1) Operating state of Glow relay is shown. However, it is difficult to check operating state because Glow relay turns OFF 2~3 sec. after operation at normal temp.

Fig.2) Checking glow relay operation and power supply to glow plug using "ACTUATION TEST" on GDS is convenient.