4.
Monitor "GLOW RELAY" parameter on the Scantool.
specification : After operating according to engine coolant temperature and battery voltage, Glow relay turns "OFF".
at IG KEY "ON". (Refer to Specification)
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 | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
- 20℃ | -10℃ | 10℃ | 50℃ | |
10V | 16sec | 10sec | 4sec | 2.0sec |
14.9V | 16sec | 10sec | 4sec | 2.0sec |
Connect Scantool 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 Scantool.
specification : After operating according to engine coolant temperature and battery voltage, Glow relay turns "OFF".
at IG KEY "ON". (Refer to Specification)
Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damge of component.
Perform checking procedure as follows.
Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.
Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking device and connecting condition between terminal and wiring.
Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition. ( after checking, reconnect the pin at correct position. )
Is the problem found?
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
▶ Go to "Power Circuit Inspection".
Check HOT AT ALL TIMES power circuit voltage
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay.
Measure the voltage of glow relay connector terminal 1.
Specification : 11.5V~13.0V
Is the measured voltage within the specification?
▶ Go to "2. Check IG KEY "ON" power circuit voltage" as follows.
▶ Repair FUSIBLE BOX 80A GLOW PLUG FUSIBLE LINK and related circuit and go to "Verification of Vehicle Repair".
Check IG KEY "ON" power circuit voltage
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay.
IG KEY "ON".
Measure the voltage of glow relay connector terminal 2.
Specification : 11.5V~13.0V
Is the measured voltage within the specification?
▶ Go to "Control Circuit Inspection".
▶ Repair E/R JUNCTION BOX 15A SNSR2 fuse and related circuit and go to "Verification of Vehicle Repair".
Check control circuit monitoring voltage
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay.
IG KEY "ON".
Measure the voltage of glow relay connector terminal 4.
Specification : 3.2V~3.7V
Is the measured voltage within the specification?
▶ Go to "Component Inspection".
▶ When no value is detected : Go to "2. Check open in control circuit".
▶ When high voltage is detected : Repair short to battery in signal circuit and go to "Verification of Vehicle Repair".
Check open in control circuit
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay and ECM connector.
Check continuity between glow relay connector terminal 4 and ECM connector(C244-K) terminal 93.
specification : Continuity ( below 1.0Ω )
Is the measured resistance within the specification?
▶ Repair short to ground and go to "Verification of Vehicle Repair".
▶ Repair open in control circuit and go to "Verification of Vehicle Repair".
Check golw relay component coil resistance
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay.
Measure the resistance of glow relay component coil.
Specification : 55±5 Ω (20℃)
Is the measured resistance within the specification?
▶ Go to "2. Check glow relay component operation" as follows.
▶ Replace glow relay and go to "Verification of Vehicle Repair".
Check glow relay component operation
IG KEY "OFF", ENGINE "OFF".
Disconnect glow relay.
Supplies random B+ and ground to coil sides of glow relay ( terminal 85, terminal 86).
Check continuity between glow relay terminal 30 and terminal 87.
specification : When power is supplied : Continuity ( below 1.0Ω )
When power is not supplied : Discontinuity ( Infinite Ω )
Is the measured resistance within the specification?
▶ Go to "Verification of Vehicle Repair".
▶ Replace glow relay and go to "Verification of Vehicle Repair".
※ Repeat this process 2~3 times.
After a repair, it is essential to verify that the fault is corrected.
After connecting Scantool select "DIAGNOSTIC TROUBLE CODES(DTCs)" mode.
Clear recorded DTC using Scantool.
Drive the vehicle within DTC "Enable conditions" in "General information".
After selecting "DIAGNOSTIC TROUBLE CODES(DTCs)" mode and check if DTC is recorded again.
Are any DTCs recorded ?
▶ Go to the DTC guide of recorded NO. in Scantool.
▶ System operates within specification.
