DTC U3003:16 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2011600

Description

Front body control module (FBCM) power supply voltage (B+ power supply) low input
Detection condition
•  Front body control module (FBCM) power supply circuit voltage of 8.8 V or less is detected for 10 s or more with the ignition switched ON (engine off or on).
Fail-safe function
Not applicable
Possible cause
•  HAZARD 25 A fuse malfunction
•  MAIN 200 A fuse malfunction
•  DTCs are stored in the PCM.
•  Battery malfunction
•  Generator malfunction
•  Front body control module (FBCM) connector or terminal malfunction
•  Front body control module (FBCM) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs AGAIN
•  Clear the DTC for the front body control module (FBCM) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 10 s or more.
•  Retrieve the front body control module (FBCM) DTCs using the M-MDS.
•  Is the same Pending DTC present?
Yes
Go to the next step.
No
Go to Step 8.
2
INSPECT FUSE
•  Inspect the following fuses
―  HAZARD 25 A fuse
―  MAIN 200 A fuse
•  Are all the fuses normal?
Yes
Go to the next step.
No
Replace the malfunctioning fuse, then go to Step 7.
3
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
(See DTC TABLE [PCM (SKYACTIV-G 2.5)].)
No
Go to the next step.
4
INSPECT BATTERY
•  Inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Recharge or replace the battery, then go to Step 7.
(See BATTERY RECHARGING.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
5
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 7.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
6
INSPECT FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  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.
No
Repair or replace the connector, then go to Step 7.
7
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery terminal.
•  Clear the DTC for the front body control module (FBCM) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 10 s or more.
•  Retrieve the front body control module (FBCM) DTCs using the M-MDS.
•  Is the same Pending DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the front body control module (FBCM).
Go to the next step.
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
No
DTC troubleshooting completed.