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1
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VERIFY ALL SYSTEM DTCs
• Switch the ignition off.
• Switch the ignition ON (engine off or on) and wait for 10 s or more.
• Perform a CMDTC self-test using the M-MDS.
• Are any 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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Go to the next step.
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2
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DETERMINE IF CAUSE OF MALFUNCTION IS TRAILER SWITCH (OPTION) SWITCH RELATED CIRCUIT
• Display the parking assist unit PID PRHB_TRAIL item using the M-MDS.
• Is the PID PRHB_TRAIL monitoring value “Yes”?
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Yes
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Go to the next step.
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No
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Go to Step 5.
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3
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VERIFY TRAILER SWITCH (OPTION) INSTALLATION CONDITION
• Ask the customer if the trailer switch (option) is installed.
• Is the trailer switch (option) installed?
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Yes
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Go to the next step.
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No
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There is a short circuit to ground in the parking assist unit terminal R-related circuit.
• Repair or replace the wiring harness which has a short to ground.
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4
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VERIFY IF TRAILER SWITCH (OPTION) IS TURNED ON
• Verify the trailer switch (option) on/off condition.
• Is the trailer switch (option) turned on?
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Yes
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System is normal. (Explain to the customer that the parking assist system is inhibited because the trailer switch (option) is turned on.)
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No
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There is a short circuit to ground in the circuit between parking assist unit terminal R and the trailer switch (option).
• Repair or replace the wiring harness which has a short to ground.
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5
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VERIFY MALFUNCTION SYMPTOM
• Switch the ignition ON (engine off or on).
• Shift the selector lever to R position.
• Does the parking sensor buzzer activated?
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Yes
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System is normal.
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No
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Go to the next step.
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6
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INSPECT CLUSTER SWITCH CONNECTOR CONDITION
• Switch the ignition off.
• Disconnect the negative battery terminal.
• 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?
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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.
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7
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INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
• Disconnect the parking assist unit 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.
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8
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INSPECT PARKING SENSOR SWITCH CIRCUIT FOR SHORT TO GROUND
• Verify that the cluster switch and parking assist unit connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
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? Cluster switch 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:
• Cluster switch terminal B—Parking assist unit terminal V
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.
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No
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Go to the next step.
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9
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INSPECT PARKING SENSOR SWITCH
• Inspect the parking sensor switch.
• Is the parking sensor switch normal?
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Yes
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Replace the parking assist unit.
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No
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Replace the cluster switch.
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