DTC P0674:00 [PCM (SKYACTIV-D 2.2)]

id0102j5213600

DTC P0674:00	Glow plug No.4 control circuit problem
DETECTION CONDITION	•  When the following conditions are met, a condition continues for 5 s in which the current at the glow plug No.4 circuit is less than 2.88 A during glow control at 75% or more of battery voltage, or glow control exceeding 65 A at less than 75% of battery voltage. ―  During glow control ―  Glow plug No.4 circuit voltage: 3—11.3 V Diagnostic support note •  This is a continuous monitor (other). •  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. •  FREEZE FRAME DATA/Snapshot data is available. •  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	•  Glow Plug No.4 connector or terminal malfunction •  Glow control module connector or terminal malfunction •  Short to power supply in wiring harness between glow plug No.4 terminal D and glow control module terminal 1A •  Open circuit in wiring harness between glow plug No.4 terminal D and glow control module terminal 1A •  PCM connector or terminal malfunction •  Short to power supply in wiring harness between glow control module terminal 2E and PCM terminal 2G •  Open circuit in wiring harness between glow control module terminal 2E and PCM terminal 2G •  Glow plug No.4 malfunction •  Glow control module malfunction •  PCM malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note •  Recording can be facilitated using the screen capture function of the PC. •  Record the freeze frame data/snap shot data.	―	Go to the next step.
2	INSPECT GLOW PLUG No.4 CONNECTOR CONDITION •  Switch the ignition OFF. •  Disconnect the glow plug No.4 connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 11.
3	INSPECT GLOW CONTROL MODULE CONNECTOR CONDITION •  Disconnect the glow control module connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 11.
4	INSPECT GLOW PLUG NO.4 CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY •  Verify that the glow plug No.4 connector and glow control module connectors are disconnected. •  Switch the ignition ON (engine off). •  Measure the voltage at glow plug No.4 terminal D (vehicle wiring harness side). •  Is the voltage 0 V?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between glow plug No.4 terminal D and the glow control module terminal 1A. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to the power supply. Go to Step 11.
5	INSPECT GLOW PLUG NO.4 CONTROL CIRCUIT FOR OPEN CIRCUIT •  Verify that the glow plug No.4 connector and glow control module connectors are disconnected. •  Inspect the wiring harness for continuity between glow plug No.4 terminal D (vehicle wiring harness side) and glow control module terminal 1A (vehicle wiring harness side). •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between glow plug No.4 terminal D and the glow control module terminal 1A. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 11.
6	INSPECT PCM CONNECTOR CONDITION •  Disconnect the PCM connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 11.
7	INSPECT GLOW CONTROL MODULE CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY •  Verify that the glow control module connector, the glow plug connector, and the PCM connector are disconnected. •  Switch the ignition ON (engine off). •  Measure the voltage at glow control module terminal 2E (vehicle wiring harness side). •  Is the voltage 0 V?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between glow control module terminal 2E and PCM terminal 2G. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to the power supply. Go to Step 11.
8	INSPECT GLOW CONTROL MODULE CONTROL CIRCUIT FOR OPEN CIRCUIT •  Verify that the glow control module connector, the glow plug connector, and the PCM connector are disconnected. •  Inspect for continuity between glow control module terminal 2E and PCM terminal 2G (vehicle wiring harness side). •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between glow control module terminal 2E and PCM terminal 2G. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 11.
9	INSPECT GLOW PLUG NO.4 •  Inspect glow plug No.4. (See GLOW PLUG INSPECTION [SKYACTIV-D 2.2].) •  Is glow plug No.4 normal?	Yes	Go to the next step.
		No	Replace glow plug No.4, then go to Step 11. (See GLOW PLUG CONTROL MODULE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
10	INSPECT GLOW CONTROL MODULE •  Inspect the glow control module. (See GLOW PLUG CONTROL MODULE INSPECTION [SKYACTIV-D 2.2].) •  Is the glow control module normal?	Yes	Go to the next step.
		No	Replace the glow control module, then go to the next step. (See GLOW PLUG CONTROL MODULE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
11	VERIFY THAT REPAIRS HAVE BEEN COMPLETED •  Reconnect all the disconnected connectors. •  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)].) •  Perform the KOEO self-test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)].) •  Has DTC P0674:00 been recorded?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
		No	Go to the next step.
12	VERIFY OTHER DTCs •  Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	DTC troubleshooting completed.