DTC B11DB:86 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2007900

System malfunction location

Error signal received from current sensor

Detection condition

•  The front body control module (FBCM) receives error signals from the current sensor for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

—

Possible cause

•  Current sensor connector or terminal malfunction

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

•  Short to ground in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E

•  Short to power supply in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E

•  Open circuit in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E

•  Current sensor malfunction

•  Front body control module (FBCM) malfunction

System malfunction location	Error signal received from current sensor
Detection condition	• The front body control module (FBCM) receives error signals from the current sensor for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	—
Possible cause	• Current sensor connector or terminal malfunction • Front body control module (FBCM) connector or terminal malfunction • Short to ground in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E • Short to power supply in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E • Open circuit in wiring harness between current sensor terminal B and front body control module (FBCM) terminal 2E • Current sensor malfunction • 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 5 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 B11DB:86 displayed?	Yes	Go to the next step.
1		No	Go to Step 9.
2	INSPECT CURRENT SENSOR CONNECTOR CONDITION • 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].) • Disconnect the current sensor 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.
2		No	Repair or replace the connector, then go to Step 8.
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 8.
4	INSPECT CURRENT SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the current sensor and front body control module (FBCM) connectors are disconnected. • Inspect for continuity between front body control module (FBCM) terminal 2E (vehicle wiring harness side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness which is shorted to ground, then go to Step 8.
4		No	Go to the next step.
5	INSPECT CURRENT SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the current sensor and front body control module (FBCM) connectors are disconnected. • Connect 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].) • Switch the ignition ON (engine off or on). • Measure the voltage at front body control module (FBCM) terminal 2E (vehicle wiring harness side). • Is the voltage 0 V?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness which is shorted to power supply, then go to Step 8.
6	INSPECT CURRENT SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the current sensor and front body control module (FBCM) connectors are disconnected. • 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].) • Inspect the wiring harness for continuity between current sensor terminal B (vehicle wiring harness side) and front body control module (FBCM) terminal 2E (vehicle wiring harness side). • Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness which has an open circuit, then go to Step 8.
7	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS CURRENT SENSOR • 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 5 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 B11DB:86 displayed?	Yes	Replace the current sensor, then go to the next step. (See CURRENT SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See CURRENT SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7		No	Go to Step 9.
8	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 5 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 B11DB:86 displayed?	Yes	Replace the front body control module (FBCM), then go to the next step. (See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
8		No	Go to the next step.
9	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)].)
9		No	DTC troubleshooting completed.