Schematic Reference: Rear Parking Assist Schematics

Important: Before performing this procedure, ensure that the vehicle park brake is SET.

Did you review the operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Ultrasonic Rear Parking Assist

1. Turn the ignition ON.
2. Place foot on the BRAKE.
3. Shift the vehicle into REVERSE.

Does the red indicator continue to flash after the bulb check?

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Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

1. Turn the ignition OFF.
2. Remove all objects at least 2 meters from the rear bumper.
3. Enter the diagnostic mode. Refer to Diagnostic Trouble Code (DTC) Displaying for more information.

Does diagnostic indicator pattern #1 ( Diagnostic Trouble Code (DTC) Displaying ) appear as shown in the diagnostic indicator table when you enter diagnostics?

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Go to Step 4

Go to Step 14

Does diagnostic indicator pattern #2, 3, 4, or 5 ( Diagnostic Trouble Code (DTC) Displaying ) appear as shown in the diagnostic indicator table?

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Go to Step 9

Go to Step 5

Does diagnostic indicator pattern #6 ( Diagnostic Trouble Code (DTC) Displaying ) appear as shown in the diagnostic indicator table?

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Go to Step 10

Go to Step 6

Does diagnostic indicator pattern #7 ( Diagnostic Trouble Code (DTC) Displaying ) appear as shown in the diagnostic indicator table?

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Go to Diagnostic Trouble Code (DTC) Displaying and to Diagnostic Trouble Code (DTC) Clearing

Go to Step 7

Does diagnostic indicator pattern #8 ( Diagnostic Trouble Code (DTC) Displaying ) appear as shown in the diagnostic indicator table?

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Go to Step 8

Go to Step 17

Does diagnostic indicator pattern #8 ( Diagnostic Trouble Code (DTC) Displaying ) still appear as shown in the diagnostic indicator table?

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Go to Step 15

Go to Step 16

1. Turn the ignition OFF.
2. Connect the DMM between the signal circuit of the inoperative rear object sensor and the low reference circuit of the rear object sensor at the rear object sensor control module with the harness connected to the module.
3. Turn the ignition ON.
4. Place foot on BRAKE.
5. Shift the vehicle into REVERSE.
6. Measure the voltage between the signal circuit of the inoperative rear object sensor and the low reference circuit of the rear object sensor.

Does the voltage measure greater than the specified value?

7 V

Go to Step 17

Go to Step 11

1. Turn the ignition OFF.
2. Disconnect the rear object sensor control module connector.
3. Measure the voltage between the rear parking assist chime signal circuit and a good ground.

Does the voltage measure greater than the specified value?

9.5 V

Go to Step 17

Go to Step 13

Test the signal circuit of the inoperative rear object sensor for an open, for a short to ground and for a short to B+. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 12

Test the supply voltage circuit and the low reference circuit of the inoperative rear object sensor for an open between S408 or S407 and the rear object sensor. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 16

Test the rear parking assist chime signal circuit for an open and for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 18

Test the rear parking assist diagnostic circuit for an open and for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 17

Test the supply voltage circuit and the low reference circuit of the rear object sensors for an open, for a short to ground and for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 17

Inspect for poor connections at the harness connector of the rear object sensor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 19

Inspect for poor connections at the harness connector of the rear object sensor control module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 20

Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 22

Go to Step 21

Replace the inoperative rear object sensor. Refer to Rear Object Sensor Replacement .

Did you find and correct the condition?

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Go to Step 22

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Replace the rear object sensor control module. Refer to Object Alarm Module Replacement .

Did you complete the replacement?

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Go to Step 22

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Replace the rear integration module (RIM). Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

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Go to Step 22

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1. Clear all codes. Refer to Diagnostic Trouble Code (DTC) Clearing .
2. Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2