DTC B118C:15 [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE]

id0902q2354600

Description | Short to power supply or open circuit in BSM indicator light (LH) circuit
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Detection condition | • The BSM control module (LH) monitors the BSM indicator light (LH) load current, while the BSM indicator light (LH) is operating. If the decrease in the BSM indicator light (LH) load current is less than the specification, the BSM control module (LH) determines that the BSM indicator light (LH) has an open circuit or short to power supply.
Possible cause | • Power outer mirror (LH) connector or terminal malfunction • BSM control module (LH) connector or terminal malfunction • Short to power supply in wiring harness between power outer mirror (LH) terminal D and BSM control module (LH) terminal D • Power outer mirror (LH) malfunction • BSM indicator light (LH) malfunction • Open circuit in wiring harness between power outer mirror (LH) terminal G and body ground • Open circuit in wiring harness between power outer mirror (LH) terminal D and BSM control module (LH) terminal D • BSM control module (LH) malfunction

Diagnostic procedure

Step | Inspection | Action
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1 | CLASSIFY OPEN CIRCUIT OR SHORT TO POWER SUPPLY MALFUNCTION • Start the engine and run it at idle. • Verify the BSM indicator light (LH) status. • Does the BSM indicator light (LH) always illuminate? | Yes | Go to the next step.
No | Go to Step 7.
2 | INSPECT POWER OUTER MIRROR (LH) CONNECTOR • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the power outer mirror (LH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 13.
No | Go to the next step.
3 | INSPECT BSM CONTROL MODULE (LH) CONNECTOR • Disconnect the BSM control module (LH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 13.
No | Go to the next step.
4 | INSPECT BSM INDICATOR LIGHT (LH) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the power outer mirror (LH) and BSM control module (LH) connectors are disconnected. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Start the engine and run it at idle. • Measure the voltage at the power outer mirror (LH) terminal D (wiring harness-side). • Is the voltage 0 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness which has a short to power supply, then go to Step 13.
5 | INSPECT POWER OUTER MIRROR (LH) • Inspect the power outer mirror (LH). (See POWER OUTER MIRROR INSPECTION.) • Is there any malfunction? | Yes | Replace the power outer mirror (LH), then go to Step 13. (See POWER OUTER MIRROR REMOVAL/INSTALLATION.)
No | Go to the next step.
6 | INSPECT BSM INDICATOR LIGHT (LH) • Inspect the BSM indicator light (LH). (See BLIND SPOT MONITORING (BSM) INDICATOR LIGHT INSPECTION.) • Is there any malfunction? | Yes | Replace the outer mirror glass (LH), then go to Step 13. (See OUTER MIRROR GLASS REMOVAL.) (See OUTER MIRROR GLASS INSTALLATION.)
No | Go to Step 13.
7 | INSPECT POWER OUTER MIRROR (LH) CONNECTOR • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the power outer mirror (LH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 13.
No | Go to the next step.
8 | INSPECT BSM INDICATOR LIGHT (LH) GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the power outer mirror (LH) connector is disconnected. • Inspect for continuity between power outer mirror (LH) terminal G (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 13.
9 | INSPECT POWER OUTER MIRROR (LH) • Inspect the power outer mirror (LH). (See POWER OUTER MIRROR INSPECTION.) • Is there any malfunction? | Yes | Replace the power outer mirror (LH), then go to Step 13. (See POWER OUTER MIRROR REMOVAL/INSTALLATION.)
No | Go to the next step.
10 | INSPECT BSM INDICATOR LIGHT (LH) • Inspect the BSM indicator light (LH). (See BLIND SPOT MONITORING (BSM) INDICATOR LIGHT INSPECTION.) • Is there any malfunction? | Yes | Replace the outer mirror glass (LH), then go to Step 13. (See OUTER MIRROR GLASS REMOVAL.) (See OUTER MIRROR GLASS INSTALLATION.)
No | Go to the next step.
11 | INSPECT BSM CONTROL MODULE (LH) CONNECTOR • Disconnect the BSM control module (LH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction? | Yes | Repair or replace the connector, then go to Step 13.
No | Go to the next step.
12 | INSPECT BSM INDICATOR LIGHT (LH) SIGNAL CIRCUIT FOR OPEN CIRCUIT • Verify that the power outer mirror (LH) and BSM control module (LH) connectors are disconnected. • Inspect for continuity between power outer mirror (LH) terminal D (wiring harness-side) and BSM control module (LH) terminal D (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.
13 | VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Clear the DTC for the BSM control module (LH) using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE].) • Retrieve the BSM control module (LH) DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE].) • Is the same DTC displayed? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the BSM control module (LH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE].) Go to the next step.
No | Go to the next step.
14 | 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 [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE].)
No | DTC troubleshooting completed.