DTC P0670:00 [SKYACTIV-D 2.2]

id0102s4067000

DTC P0670:00

Glow control module control circuit problem
DETECTION CONDITION
•  Voltage after boosted by the boost circuit inside the glow control module is less than 15.5 V, or the power supply voltage for glow plug power supply at glow control module is less than 1 V for a continuous 5 s when all of the following conditions are met.
MONITORING CONDITIONS
―  Battery voltage: 8—20 V
―  0.5 s have elapsed after the ignition was switched ON (engine off or on)
―  Detects that the output duty value of the glow plug is 8 to 96 % for 1 s or more.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE
•  Glow control module connector or terminals malfunction
•  Short to ground or open circuit in glow control module power supply circuit
―  Short to ground in wiring harness between GLOW 80 A fuse and glow control module terminal 2C
―  GLOW 80 A fuse malfunction
―  Open circuit in wiring harness between battery positive terminal and glow control module terminal 2C
•  Short to ground or open circuit in glow control module power supply circuit
―  Short to ground in wiring harness between ENGINE1 15 A fuse and glow control module terminal 2D
―  ENGINE1 15 A fuse malfunction
―  Open circuit in wiring harness between main relay terminal D and glow control module terminal 2D
•  Open circuit in wiring harness between glow control module terminal 2A and body ground
―  GLOW SIG 5 A fuse malfunction
•  Glow plug connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  Glow control module terminal 1B—Glow plug terminal A
―  Glow control module terminal 1F—Glow plug terminal B
―  Glow control module terminal 1E—Glow plug terminal C
―  Glow control module terminal 1A—Glow plug terminal D
•  Short to power supply in wiring harness between the following terminals:
―  Glow control module terminal 1B—Glow plug terminal A
―  Glow control module terminal 1F—Glow plug terminal B
―  Glow control module terminal 1E—Glow plug terminal C
―  Glow control module terminal 1A—Glow plug terminal D
•  Glow plug circuits are shorted to each other
•  Short to ground in wiring harness between the following terminals:
―  Glow control module terminal 2B—PCM terminal 2I
―  Glow control module terminal 2E—PCM terminal 2BA
•  PCM connector or terminals malfunction
•  Short to power supply in wiring harness between the following terminals:
―  Glow control module terminal 2B—PCM terminal 2I
―  Glow control module terminal 2E—PCM terminal 2BA
•  Glow control module circuits are shorted to each other
•  Open circuit in wiring harness between the following terminals:
―  Glow control module terminal 2B—PCM terminal 2I
―  Glow control module terminal 2E—PCM terminal 2BA
•  Glow control module temperature is too high (more than 125 °C {257 °F})
•  Glow control module malfunction
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [SKYACTIV-D 2.2].)
No
Go to the next step.
4
INSPECT GLOW CONTROL MODULE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the glow control module connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 18.
No
Go to the next step.
5
INSPECT GLOW CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
•  Verify that the glow control module connector is disconnected.
•  Measure the voltage at the glow control module terminal 2C (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the GLOW 80 A fuse.
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between GLOW 80 A fuse and glow control module terminal 2C.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
•  Replace the fuse.
•  If the fuse is damaged:
―  Replace the fuse.
•  If the fuse is normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and glow control module terminal 2C.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 18.
6
INSPECT GLOW CONTROL MODULE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
•  Verify that the glow control module connector is disconnected.
•  Switch the ignition ON (engine off).
•  Measure the voltage at the glow control module terminal 2D (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ENGINE1 15 A fuse.
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE1 15 A fuse and glow control module terminal 2D.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
•  Replace the fuse.
•  If the fuse is damaged:
―  Replace the fuse.
•  If the fuse is normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal D and glow control module terminal 2D.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 18.
7
INSPECT GLOW CONTROL MODULE GROUND CIRCUIT FOR OPEN CIRCUIT
•  Verify that the glow control module connector is disconnected.
•  Switch the ignition off.
•  Inspect for continuity between glow control module terminal 2A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Inspect the GLOW SIG 5 A fuse.
•  If the fuse is blown or deteriorated:
―  Replace the fuse.
•  If the fuse is normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between glow control module terminal 2A and body ground.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 18.
8
INSPECT GLOW PLUG CONNECTOR CONDITION
•  Disconnect the glow plug connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 18.
No
Go to the next step.
9
INSPECT GLOW PLUG CIRCUIT FOR SHORT TO GROUND
•  Verify that the glow control module and glow plug connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Glow plug terminal A
―  Glow plug terminal B
―  Glow plug terminal C
―  Glow plug terminal D
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 1B—Glow plug terminal A
•  Glow control module terminal 1F—Glow plug terminal B
•  Glow control module terminal 1E—Glow plug terminal C
•  Glow control module terminal 1A—Glow plug terminal D
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 18.
No
Go to the next step.
10
INSPECT GLOW PLUG CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the glow control module and glow plug connectors are disconnected.
•  Switch the ignition ON (engine off).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Glow plug terminal A
―  Glow plug terminal B
―  Glow plug terminal C
―  Glow plug terminal D
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 1B—Glow plug terminal A
•  Glow control module terminal 1F—Glow plug terminal B
•  Glow control module terminal 1E—Glow plug terminal C
•  Glow control module terminal 1A—Glow plug terminal D
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 18.
11
INSPECT GLOW PLUG CIRCUITS FOR SHORT TO EACH OTHER
•  Verify that the glow control module and glow plug connectors are disconnected.
•  Switch the ignition off.
•  Inspect for continuity between glow plug terminals A, B, C and D (wiring harness-side).
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 1B—Glow plug terminal A
•  Glow control module terminal 1F—Glow plug terminal B
•  Glow control module terminal 1E—Glow plug terminal C
•  Glow control module terminal 1A—Glow plug terminal D
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to each other.
Go to Step 18.
No
Go to the next step.
12
INSPECT GLOW CONTROL MODULE CIRCUIT FOR SHORT TO GROUND
•  Verify that the glow control module and glow plug connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Glow control module terminal 2B
―  Glow control module terminal 2E
•  Is there continuity?
Yes
If the short to ground circuit could be detected in the wiring harness:
•  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
―  Glow control module terminal 2B—PCM terminal 2I
―  Glow control module terminal 2E—PCM terminal 2BA
If there is a common connector:
―  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
―  Repair or replace the malfunctioning part.
If there is no common connector:
―  Repair or replace the wiring harness which has a short to ground.
If the short to ground circuit could not be detected in the wiring harness:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 18.
No
Go to the next step.
13
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 18.
No
Go to the next step.
14
INSPECT GLOW CONTROL MODULE CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the glow control module and glow plug and PCM connectors are disconnected.
•  Switch the ignition ON (engine off).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Glow control module terminal 2B
―  Glow control module terminal 2E
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 2B—PCM terminal 2I
•  Glow control module terminal 2E—PCM terminal 2BA
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 18.
15
INSPECT GLOW CONTROL MODULE CIRCUITS FOR SHORT TO EACH OTHER
•  Verify that the glow control module and glow plug and PCM connectors are disconnected.
•  Switch the ignition off.
•  Inspect for continuity between glow control module terminals 2B and 2E (wiring harness-side).
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 2B—PCM terminal 2I
•  Glow control module terminal 2E—PCM terminal 2BA
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to each other.
Go to Step 18.
No
Go to the next step.
16
INSPECT GLOW CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT
•  Verify that the glow control module and glow plug and PCM connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Glow control module terminal 2B—PCM terminal 2I
―  Glow control module terminal 2E—PCM terminal 2BA
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Glow control module terminal 2B—PCM terminal 2I
•  Glow control module terminal 2E—PCM terminal 2BA
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 18.
17
INSPECT GLOW CONTROL MODULE
•  Inspect the glow control module.
•  Is there any malfunction?
Yes
Replace the glow control module, then go to the next step.
(See GLOW PLUG CONTROL MODULE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
18
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
19
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 2.2].)
No
DTC troubleshooting completed.