DTC U1007:68 [FRONT BODY CONTROL MODULE (FBCM)]


id0902p2011000

System malfunction location

Communication error with current sensor

Detection condition
•  The front body control module (FBCM) detects communication error with the current sensor for 5 s.
Fail-safe
Possible cause
•  Malfunction in communication line between front body control module (FBCM) and current sensor
•  Current sensor connector or terminal malfunction
•  Short to ground or open circuit in current sensor power supply circuit
―  Short to ground in wiring harness between battery positive terminal and current sensor terminal A
―  MAIN 200 A fuse malfunction
―  ENG.+B 7.5 A fuse malfunction
―  Open circuit in wiring harness between battery positive terminal and current sensor terminal A
•  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
•  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.
•  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.
•  Is DTC U1007:68 displayed?
Yes
Go to the next step.
No
Go to Step 9.
2
INSPECT CURRENT SENSOR CONNECTOR
•  Switch the ignition to off.
•  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.
No
Repair or replace the connector, then go to Step 8.
3
INSPECT CURRENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Verify that the current sensor connector is disconnected.
•  Measure the voltage at current sensor terminal A (vehicle wiring harness side).
•  Is the voltage B+?
Yes
Go to the next step.
No
INSPECT MAIN 200 A FUSE AND ENG.+B 7.5 A FUSE
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the burnt out fuse.
•  If a fuse is damaged:
―  Replace the damaged fuse.
•  All fuses are normal:
―  Repair or replace the wiring harness which has an open circuit.
Go to Step 8.
4
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.
No
Repair or replace the connector, then go to Step 8.
5
INSPECT CURRENT SENSOR LIN COMMUNICATION CIRCUIT FOR SHORT TO GROUND
•  Verify that the current sensor and front body control module (FBCM) connectors are disconnected.
•  Inspect for continuity between current sensor terminal B (vehicle wiring harness) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 8.
No
Go to the next step.
6
INSPECT CURRENT SENSOR LIN COMMUNICATION CIRCUIT FOR OPEN CIRCUIT
•  Verify that the current sensor and front body control module (FBCM) connectors are disconnected.
•  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.
No
Repair or replace the wiring harness, then go to Step 8.
7
INSPECT CURRENT SENSOR
•  Is the current sensor normal?
Yes
Go to the next step.
No
Replace the current sensor, then go to the next step.
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Reconnect all the disconnected connectors.
•  Clear front body control module (FBCM) DTCs using the M-MDS.
•  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.
•  Is DTC U1007:68 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.
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.
No
DTC troubleshooting completed.