DTC Code | DTC Name |
---|---|
P0380 | Glow Plug / Heater Circuit "A" Malfunction |
DESCRIPTION
The glow plug is mounted inside the engine combustion chamber. To ensure efficient engine starting with a cold engine, the ECM calculates the time interval the current needs to flow through the glow plug, depending on the engine coolant temperature when the ignition switch is turned to ON. The ECM then turns on the glow plug relay assembly and permits the current to flow through the glow plug based on the calculated time of the ECM. The glow plug is then heated, and enhances fuel combustion with a cold engine.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
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P0380 | Glow Plug / Heater Circuit "A" Malfunction |
Open or short in glow plug relay assembly circuit. (2 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | DTC Detection Drive Pattern |
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P0380 | Ignition switch ON for 1 second |
DTC No. | Data List |
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P0380 |
|
If DTC P0380 is stored, the following symptoms may appear:
Difficult starting
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the ECM, perform ECM Initialization and Registration.
Click here Нажмите здесь
Inspect the fuse for circuits related to this system before performing the following procedure.
After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here Нажмите здесь
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
READ VALUE USING GTS (PRE GLOW AND AFTER GLOW)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Pre Glow and After Glow.
Powertrain > Engine and ECT > Data ListTester Display |
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Pre Glow |
After Glow |
Read the values when before and after start the engine.
OK |
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"Pre Glow" is ON before starting the engine and "After Glow" is ON after starting the engine. |
"Pre Glow" and "After Glow" times vary depending on the engine coolant temperature sensor.
Click hereНажмите здесь
Pre-glow time depends on battery voltage and engine coolant temperature.
After-glow time depends on atmospheric pressure and engine coolant temperature.
Result | |||
---|---|---|---|
|
OK |
CHECK FOR INTERMITTENT PROBLEMS Click hereНажмите здесь |
NG |
INSPECT GLOW PLUG RELAY ASSEMBLY
*a |
Component without harness connected (Glow Plug Relay Assembly) |
Disconnect the glow plug relay assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||
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Result | |||
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NG | Нажмите здесь |
OK |
CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY ASSEMBLY - ECM)
Disconnect the glow plug relay assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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Result | |||
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NG | Нажмите здесь |
GO TO STEP 8 |
OK |
CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY ASSEMBLY - EFI-MAIN RELAY)
Disconnect the glow plug relay assembly connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
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Result | |||
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NG | Нажмите здесь |
GO TO STEP 8 |
OK |
CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY ASSEMBLY - GLOW PLUG ASSEMBLY - BATTERY)
Disconnect the negative (-) battery terminal.
Disconnect the positive (+) battery terminal.
Disconnect the glow plug relay assembly connector.
Disconnect the glow plug wire.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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Result | |||
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NG | Нажмите здесь |
OK |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Confirm that the pending DTC is not output again.
Powertrain > Engine and ECT > Trouble CodesResult | ||
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NEXT |
END |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result | ||
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NEXT | Нажмите здесь |
GO TO STEP 7 |
REPLACE GLOW PLUG RELAY ASSEMBLY
Replace the glow plug relay assembly.
Result | ||
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|
NEXT | Нажмите здесь |
GO TO STEP 7 |