DTC B12BD:11 [CONNECTIVITY MASTER UNIT]

id0902n7105700

Description

Rear mount camera circuit malfunction
Detection condition
•  The connectivity master unit (CMU) detects a voltage value for the rear mount camera circuit of within 5.8 V or exceeding 6.2 V with the ignition switched ON (engine off or on).
Fail-safe function
Not applicable
Possible cause
•  Rear mount camera connector or terminal malfunction
•  Connectivity master unit (CMU) connector or terminal malfunction
•  Short to ground in wiring harness between connectivity master unit (CMU) terminal 1C and rear mount camera terminal A
•  Rear mount camera malfunction
•  Connectivity master unit (CMU) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT REAR MOUNT CAMERA CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the rear mount camera 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 5.
2
INSPECT CONNECTIVITY MASTER UNIT (CMU) CONNECTOR CONDITION
•  Disconnect the connectivity master unit (CMU) 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 5.
3
INSPECT REAR MOUNT CAMERA CIRCUIT FOR SHORT TO GROUND
•  Verify that the rear mount camera and connectivity master unit (CMU) connectors are disconnected.
•  Inspect for continuity between rear mount camera terminal A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between connectivity master unit (CMU) terminal 1C and rear mount camera terminal A.
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted to ground.
Go to Step 5.
No
Go to the next step.
4
PERFORM DTC INSPECTION AND VERIFY IF REAR MOUNT CAMERA IS MALFUNCTIONING
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 12 s or more.
•  Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the rear mount camera, then go to the next step.
(See REAR MOUNT CAMERA REMOVAL/INSTALLATION.)
No
Go to Step 6.
5
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 12 s or more.
•  Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the connectivity master unit (CMU).
Go to the next step.
No
Go to the next step.
6
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [CONNECTIVITY MASTER UNIT].)
No
DTC troubleshooting completed.