DTC U2138:00 [REAR SIDE RADAR SENSOR]
id1502c8078000
Outline
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System malfunction location |
Communication error with rear side radar sensor (LH) |
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Detection condition
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• The rear side radar sensor (RH) cannot receive the CAN signal from the rear side radar sensor (LH).
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Fail-safe
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Possible cause
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• Rear side radar sensor (LH) poor installation
• Rear side radar sensor (LH) connector or terminal malfunction
• Short to ground or open circuit in rear side radar sensor (LH) power supply circuit
• Open circuit in rear side radar sensor (LH) ground circuit
• Rear side radar sensor (RH) connector or terminal malfunction
• Short to ground in local CAN circuit
• Short to power supply in local CAN circuit
• Open circuit in local CAN circuit
• Rear side radar sensor (LH) malfunction
• Rear side radar sensor (RH) malfunction
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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INSPECT REAR SIDE RADAR SENSOR FOR MALFUNCTION
• Perform the DTC inspection for the rear side radar sensor.
(See DTC INSPECTION.)
• Is a DTC related to an internal malfunction displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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2
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VERIFY REAR BUMPER INSTALLATION CONDITION
• Verify the rear bumper installation condition.
• Is the installation condition 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 malfunctioning location and perform the repair completion verification.
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3
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VERIFY REAR SIDE RADAR SENSOR INSTALLATION CONDITION
• Verify the rear side radar sensor installation condition.
• Is the installation condition normal?
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Yes
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Perform the rear side radar sensor radar aiming.
Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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4
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INSPECT REAR SIDE RADAR SENSOR (LH) CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)
• Are the connector and terminal 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 malfunctioning location and perform the repair completion verification.
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5
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INSPECT REAR SIDE RADAR SENSOR (LH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT
• Inspect the power supply circuit for a short to ground and open circuit.
(See CIRCUIT INSPECTION.)
• Is the circuit 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 malfunctioning location and perform the repair completion verification.
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6
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INSPECT REAR SIDE RADAR SENSOR (LH) GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for an open circuit.
(See CIRCUIT INSPECTION.)
• Is the circuit 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 malfunctioning location and perform the repair completion verification.
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7
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INSPECT REAR SIDE RADAR SENSOR (RH) CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)
• Are the connector and terminal 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 malfunctioning location and perform the repair completion verification.
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8
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INSPECT LOCAL CAN CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground.
(See CIRCUIT INSPECTION.)
• Is the circuit 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 malfunctioning location and perform the repair completion verification.
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9
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INSPECT LOCAL CAN CIRCUIT FOR SHORT TO POWER SUPPLY
• Inspect the applicable circuit for a short to power supply.
(See CIRCUIT INSPECTION.)
• Is the circuit 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 malfunctioning location and perform the repair completion verification.
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10
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INSPECT LOCAL CAN CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for an open circuit.
(See CIRCUIT INSPECTION.)
• Is the circuit 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 malfunctioning location and perform the repair completion verification.
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11
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INSPECT REAR SIDE RADAR SENSOR (LH) FOR MALFUNCTION DEPENDING ON REPEATABILITY
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the DTC inspection for the rear side radar sensor.
(See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, replace the rear side radar sensor (LH) and perform the repair completion verification.
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No
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Go to repair completion verification 2.
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the DTC inspection for the rear side radar sensor.
(See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the rear side radar sensor (RH), then go to the next step.
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No
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Go to the next step.
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Repair completion verification 2
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VERIFY IF OTHER DTC IS DISPLAYED
• Perform the DTC inspection.
(See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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