Heating combustion chamber, glow plug increases fuel ignitibility and makes fuel in the foggy state easily when engine is cold. Thus, glow plug makes engine starting easily and decreases exhaust gas produced just after turning engine on when engine is cold.
ECM controls operation and operating duration of glow plug relay which supplies power to glow plug with ECTS signal, battery voltage and IG KEY ON signal.
Through glow lamp in cluster, ECM let drivers know if glow plug is ON.
P0670 is set when 1)excessive voltage is detected or 2)no current is detected like open or short to ground in glow relay control circuit for more than 1 sec. at glow relay ON condition. This code is due to open in glow relay control circuit or internal open in glow relay component.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Voltage monitoring
? Glow relay control circuit
? Glow relay component
Enable Conditions
? IG KEY "ON" (monitoring only performed within relay operating condition)
Threshold Value
? Short to battery
? Short to GND, Wiring open
Diagnostic Time
? 1.0 sec.
Fail Safe
Fuel Cut
NO
EGR Off
Fuel Limit
Check Lamp
- 20?
- 10?
10?
50?
10V
16sec
10sec
4sec
2.0sec
14.9V