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1
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INSPECT BSM CONTROL MODULE (LH) CONNECTOR CONDITION
• Switch the ignition off.
• Disconnect the negative battery cable.
• 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 the connector normal?
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Yes
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Go to the next step.
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No
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Repair or replace the connector, then go to Step 7.
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2
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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?
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Yes
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Go to the next step.
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No
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Repair or replace the connector, then go to Step 7.
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3
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INSPECT FOR SHORT TO GROUND IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH)
• Verify that the BSM control module (LH) and (RH) connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
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― BSM control module (LH) terminal A
― BSM control module (LH) terminal B
• Is there continuity?
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Yes
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Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
• BSM control module (LH) terminal A—BSM control module (RH) terminal A
• BSM control module (LH) terminal B—BSM control module (RH) 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.
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No
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Go to the next step.
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4
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INSPECT FOR SHORT TO POWER SUPPLY IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH)
• Verify that the BSM control module (LH) and (RH) connectors are disconnected.
• Reconnect the negative battery cable.
• Switch the ignition ON (engine off or on).
• Measure the voltage at the following terminals (wiring harness-side):
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― BSM control module (LH) terminal A
― BSM control module (LH) terminal B
• Is the voltage 0 V?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between following terminals:
• BSM control module (LH) terminal A—BSM control module (RH) terminal A
• BSM control module (LH) terminal B—BSM control module (RH) 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 power supply.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has a short to power supply.
Go to Step 7.
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5
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INSPECT FOR OPEN CIRCUIT IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH)
• Switch the ignition off.
• Disconnect the negative battery cable.
• Verify that the BSM control module (LH) and (RH) connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side):
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― BSM control module (LH) terminal A—BSM control module (RH) terminal A
― BSM control module (LH) terminal B—BSM control module (RH) terminal B
• Is there continuity?
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Yes
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Note
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• Keep the replaced BSM control module (LH) because it may be used for diagnosis later.
Replace the BSM control module (LH).
Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
• BSM control module (LH) terminal A—BSM control module (RH) terminal A
• BSM control module (LH) terminal B—BSM control module (RH) 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 an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
Go to step 7.
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6
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PERFORM DTC INSPECTION AND VERIFY BSM CONTROL MODULE (LH) MALFUNCTION
• Always reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC for the BSM control module (RH) using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 1 s or more.
• Retrieve the BSM control module (RH) DTCs using the M-MDS.
• Is the same DTC displayed?
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Yes
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Remove the BSM control module (RH) and install the BSM control module (LH) replaced in Step 5.
Go to the next step.
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No
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Go to Step 8.
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7
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PERFORM DTC INSPECTION AND VERIFY BSM CONTROL MODULE (RH) MALFUNCTION
• Make sure to reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC for the BSM control module (RH) using the M-MDS.
• Switch the ignition ON (engine off or on) and wait for 1 s or more.
• Retrieve the BSM control module (RH) DTCs using the M-MDS.
• Is the same DTC displayed?
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Yes
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Repeat the diagnosis from Step 1.
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No
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Go to the next step.
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8
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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