DTC B118D:15 [BLIND SPOT MONITORING (BSM)]

id0902i3393000

Caution
•  Configuration cannot be implemented correctly if only the blind spot monitoring (BSM) control module (LH) is replaced. When replacing the blind spot monitoring (BSM) control module (LH), it is necessary to replace the blind spot monitoring (BSM) control module (RH) at the same time.

System malfunction location

BSM indicator light (RH) circuit malfunction
Detection condition
•  While the BSM indicator light (RH) is operated, the BSM control module (RH) monitors the BSM indicator light (RH) load voltage. Decrease in the BSM indicator light (RH) load voltage is the specified value or less, and the BSM control module (RH) determined that there is a short to power supply or an open circuit in the BSM indicator light (RH) circuit.
Fail-safe
•  BSM is stopped.
Possible cause
•  Malfunction in power outer mirror (RH) connector or terminal
•  Open circuit in wiring harness between power outer mirror (RH) terminal G and body ground
•  Malfunction in BSM control module (RH) connector or terminal
•  Short to power supply in wiring harness between BSM control module (RH) terminal D and power outer mirror (RH) terminal D
•  Power outer mirror (RH) malfunction
•  BSM indicator light (RH) malfunction
•  Open circuit in wiring harness between BSM control module (RH) terminal D and power outer mirror (RH) terminal D
•  BSM control module (RH) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT POWER OUTER MIRROR (RH) CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the power outer mirror (RH) 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.
2
INSPECT BSM INDICATOR LIGHT (RH) GROUND CIRCUIT FOR OPEN CIRCUIT
•  Verify that the power outer mirror (RH) connector is disconnected.
•  Inspect for continuity between power outer mirror (RH) terminal G (vehicle wiring harness side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness which has an open circuit, then go to Step 8.
3
INSPECT BSM CONTROL MODULE (RH) CONNECTOR CONDITION
•  Disconnect the BSM control module (RH) 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.
4
INSPECT BSM INDICATOR LIGHT (RH) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the BSM control module (RH) and power outer mirror (RH) connectors are disconnected.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at power outer mirror (RH) terminal D (vehicle wiring harness side).
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness which is shorted to power supply, then go to Step 8.
5
INSPECT POWER OUTER MIRROR (RH)
•  Inspect the power outer mirror (RH).
•  Is the power outer mirror (RH) normal?
Yes
Go to the next step.
No
Replace the power outer mirror (RH), then go to Step 8.
(See POWER OUTER MIRROR REMOVAL/INSTALLATION.)
6
INSPECT BSM INDICATOR LIGHT (RH)
•  Inspect the BSM indicator light (RH).
•  Is the BSM indicator light (RH) normal?
Yes
Go to the next step.
No
Replace the outer mirror glass (RH), then go to Step 8.
(See OUTER MIRROR GLASS REMOVAL.)
(See OUTER MIRROR GLASS INSTALLATION.)
7
INSPECT BSM INDICATOR LIGHT (RH) SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Verify that the BSM control module (RH) and power outer mirror (RH) connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between BSM control module (RH) (vehicle wiring harness side) terminal D and power outer mirror (RH) terminal D (vehicle wiring harness side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness which has an open circuit, then go to the next step.
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Reconnect all the disconnected connectors.
•  Reconnect the disconnected negative battery cable.
•  Clear the BSM control module (RH) DTCs using the M-MDS.
•  Perform the DTC inspection for the BSM control module (RH) using the M-MDS.
•  Is DTC B118D:15 displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the BSM control module, 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.
(See DTC TABLE [BLIND SPOT MONITORING (BSM)].)
No
DTC troubleshooting completed.