DTC B1142:13 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2007700

System malfunction location

Front body control module (FBCM) power supply voltage (+IG1 power supply) input circuit malfunction

Detection condition

•  The front body control module (FBCM) detects an open circuit in the IG1 relay circuit for 2 s or more with the ignition switched ON (engine off or on).

Fail-safe

—

Possible cause

•  IG1 relay malfunction

•  Front body control module (FBCM) connector or terminal malfunction

•  C/U IG1 15 A fuse malfunction

•  Open circuit in the wiring harness between IG1 relay terminal C and front body control module (FBCM) terminal 2M

•  Front body control module (FBCM) malfunction

System malfunction location	Front body control module (FBCM) power supply voltage (+IG1 power supply) input circuit malfunction
Detection condition	• The front body control module (FBCM) detects an open circuit in the IG1 relay circuit for 2 s or more with the ignition switched ON (engine off or on).
Fail-safe	—
Possible cause	• IG1 relay malfunction • Front body control module (FBCM) connector or terminal malfunction • C/U IG1 15 A fuse malfunction • Open circuit in the wiring harness between IG1 relay terminal C and front body control module (FBCM) terminal 2M • Front body control module (FBCM) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs AGAIN • Clear front body control module (FBCM) DTCs using the M-MDS. (See CLEARING DTC [FRONT BODY CONTROL MODULE (FBCM)].) • Switch the ignition ON (engine off or on) and wait for 2 s or more. • Perform the front body control module (FBCM) DTC inspection using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Is DTC B1142:13 displayed?	Yes	Go to the next step.
1		No	Go to Step 7.
2	INSPECT IG1 RELAY FOR MALFUNCTION • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Remove the IG1 relay. • Inspect the IG1 relay. (See RELAY INSPECTION.) • Is the IG1 relay normal?	Yes	Go to the next step.
2		No	Replace the IG1 relay, then go to Step 6.
3	INSPECT FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION • Disconnect the front body control module (FBCM) 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.
3		No	Repair or replace the connector, then go to Step 6.
4	INSPECT C/U IG1 15 A FUSE FOR MALFUNCTION • Remove the C/U IG1 15 A fuse. • Inspect the C/U IG1 15 A fuse. • Is the C/U IG1 15 A fuse normal?	Yes	Install the C/U IG1 15 A fuse, then go to the next step.
4		No	If a fuse is burnt out: • Repair or replace the wiring harness which is shorted to ground. • Replace the fuse. If a fuse is damaged: • Replace the fuse. Go to Step 6.
5	INSPECT FRONT BODY CONTROL MODULE (FBCM) POWER SUPPLY VOLTAGE (+IG1 POWER SUPPLY) INPUT CIRCUIT FOR OPEN CIRCUIT • Verify that the IG1 relay is removed. • Verify that the front body control module (FBCM) connector is disconnected. • Inspect the wiring harness for continuity between IG1 relay terminal C (vehicle wiring harness side) and front body control module (FBCM) terminal 2M (vehicle wiring harness side). • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness and go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear front body control module (FBCM) DTCs using the M-MDS. (See CLEARING DTC [FRONT BODY CONTROL MODULE (FBCM)].) • Switch the ignition ON (engine off or on) and wait for 2 s or more. • Perform the front body control module (FBCM) DTC inspection using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Is DTC B1142:13 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the front body control module (FBCM), then go to the next step. (See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
7		No	DTC troubleshooting completed.