DTC U0106:00 [SKYACTIV-D 1.5]

id0102q2945900

DTC U0106:00

LIN communication system: glow control module information communication error with PCM

DETECTION CONDITION

•  With the following conditions continued for 1.5 s, a communication error between the glow control module is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: above 8 V

―  Ignition switch is ON (under the engine on or off)

•  With the following conditions met, a communication error between the glow control module is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 8—20 V

―  0.5 s have elapsed after the ignition was switched ON (under the engine on or off)

―  Voltage at glow plug-related circuit is 6 to 11 V continuously for 0.2 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/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Function of the glow control module stops.

POSSIBLE CAUSE

•  LIN communication line between glow control module and PCM malfunction

•  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 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

•  PCM connector or terminals malfunction

•  Short to ground in wiring harness between glow control module terminal 2E—PCM terminal 1Q

•  Short to power supply in wiring harness between glow control module terminal 2E—PCM terminal 1Q

•  Open circuit in wiring harness between glow control module terminal 2E—PCM terminal 1Q

•  Glow control module malfunction

•  PCM malfunction

DTC U0106:00	LIN communication system: glow control module information communication error with PCM
DETECTION CONDITION	• With the following conditions continued for 1.5 s, a communication error between the glow control module is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: above 8 V ― Ignition switch is ON (under the engine on or off) • With the following conditions met, a communication error between the glow control module is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 8—20 V ― 0.5 s have elapsed after the ignition was switched ON (under the engine on or off) ― Voltage at glow plug-related circuit is 6 to 11 V continuously for 0.2 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/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Function of the glow control module stops.
POSSIBLE CAUSE	• LIN communication line between glow control module and PCM malfunction • 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 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 • PCM connector or terminals malfunction • Short to ground in wiring harness between glow control module terminal 2E—PCM terminal 1Q • Short to power supply in wiring harness between glow control module terminal 2E—PCM terminal 1Q • Open circuit in wiring harness between glow control module terminal 2E—PCM terminal 1Q • Glow control module malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	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.
2		No	Go to the next step.
3	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 11.
3		No	Go to the next step.
4	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). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the glow control module terminal 2D (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
4		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 all fuses are 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 11.
5	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.
5		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 11.
6	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 11.
6		No	Go to the next step.
7	INSPECT GLOW CONTROL MODULE CIRCUIT FOR SHORT TO GROUND • Verify that the glow control module and PCM connectors are disconnected. • Inspect for continuity between glow control module terminal 2E (wiring harness-side) and body ground: • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between glow control module terminal 2E and PCM terminal 1Q 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 11.
8	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). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the glow control module terminal 2E (wiring harness-side): • Is the voltage 0 V?	Yes	Go to the next step.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between glow control module terminal 2E and PCM terminal 1Q 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 11.
9	INSPECT GLOW CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT • 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 terminal 2E and PCM terminal 1Q (wiring harness-side): • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between glow control module terminal 2E and PCM terminal 1Q 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 11.
10	INSPECT GLOW CONTROL MODULE • Inspect the glow control module. (See GLOW PLUG CONTROL MODULE INSPECTION [SKYACTIV-D 1.5].) • 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 1.5].)
10		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Perform the KOEO self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 1.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to the next step.
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
12		No	DTC troubleshooting completed.