Description

Blind spot monitoring (BSM) switch circuit malfunction

Detection condition

• Blind spot monitoring (BSM) control module (LH) receives the blind spot monitoring (BSM) switch ON signal from the instrument cluster for 2 min or more with the ignition switched ON (engine off or on).

Fail-safe

• Blind spot monitoring (BSM) system is stopped.

Possible cause

• DTCs are stored in the instrument cluster.

• Cluster switch connector or terminal malfunction

• Blind spot monitoring (BSM) switch malfunction

• Instrument cluster connector or terminal malfunction

• Short to ground in wiring harness between instrument cluster terminal V and cluster switch terminal B.

• Instrument cluster malfunction

• Blind spot monitoring (BSM) control module (LH) malfunction

Step

Inspection

Action

1

• Retrieve the instrument cluster DTCs using the M-MDS.

  (See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the cluster switch 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.

3

• Inspect the blind spot monitoring (BSM) switch.

  (See BLIND SPOT MONITORING (BSM) SWITCH INSPECTION.)

• Is the blind spot monitoring (BSM) switch normal?

Yes

Go to the next step.

No

Replace the cluster switch, then go to Step 7.

(See CLUSTER SWITCH REMOVAL/INSTALLATION.)

4

• Disconnect the instrument cluster 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.

5

• Verify that the instrument cluster and cluster switch connectors are disconnected.

• Inspect for continuity between cluster switch terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between instrument cluster terminal V and cluster switch terminal B.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 7.

No

Go to the next step.

6

• Inspect the instrument cluster.

  (See INSTRUMENT CLUSTER INSPECTION.)

• Is the instrument cluster normal?

Yes

Go to the next step.

No

Replace the instrument cluster, then go to the next step.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

7

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for blind spot monitoring (BSM) control module using the M-MDS.

  (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

• Switch the ignition ON (engine off or on) and wait for 2 min or more.

• Retrieve the blind spot monitoring (BSM) control module DTCs using the M-MDS.

  (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the blind spot monitoring (BSM) control module (LH).

  (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

8

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

No

DTC troubleshooting completed.