DTC C1189 [BCM]
id0902f5836600
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Description |
Brake fluid level sensor circuit malfunction |
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Detection condition
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• Short to ground in brake fluid level sensor circuit with the brake fluid level on the upper side of the MIN.
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Possible cause
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• Brake fluid level sensor connector or terminal malfunction
• Brake fluid level sensor malfunction
• BCM connector or terminal malfunction
• Short to ground in wiring harness between brake fluid level sensor terminal B and BCM terminal 1D
• BCM malfunction
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Diagnostic procedure
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Step |
Inspection |
Action |
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1
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INSPECT BRAKE FLUID LEVEL SENSOR CONNECTOR
• Turn the ignition switch to the OFF position.
• Disconnect the negative battery cable.
• Disconnect the brake fluid level sensor connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is there any malfunction?
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Yes
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Repair or replace the connector, then go to Step 5.
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No
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Go to the next step.
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2
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INSPECT BRAKE FLUID LEVEL SENSOR
• Inspect the brake fluid level sensor.
• Is there any malfunction?
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Yes
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Replace the reserve tank, then go to Step 5.
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No
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Go to the next step.
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3
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INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is there any malfunction?
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Yes
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Repair or replace the connector, then go to Step 5.
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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 GROUND IN BRAKE FLUID LEVEL SENSOR CIRCUIT
• Verify that the brake fluid level sensor and BCM connectors are disconnected.
• Inspect for continuity between brake fluid level sensor terminal B (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness which has a short to ground, then go to the next step.
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No
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Go to the next step.
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5
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC for the BCM using the M-MDS.
(See CLEARING DTC [BCM].)
• Retrieve the BCM DTCs using the M-MDS with the brake fluid level on the upper side of the MIN.
(See DTC INSPECTION [BCM].)
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the BCM.
Go to the next step.
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No
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Go to the next step.
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6
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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.
(See DTC TABLE [BCM].)
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No
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DTC troubleshooting completed.
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