Did you review the ultrasonic rear parking assist operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Ultrasonic Rear Parking Assist

1. Drive the vehicle forward at least 24 km/hr (15 mph).
2. Stop the vehicle.
3. Turn OFF the ignition.
4. Turn ON the ignition, then shift into REVERSE within five seconds.
5. Observe the information center telltale assembly. The three indicators (one red, two yellow) should flash simultaneously for 1.5 seconds (bulb check), then turn off.
6. Continue to observe the telltale assembly. All indicators should be off.

Does the system operate normally ?

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

Go to Step 3

1. Turn ON the ignition.
2. Place the gear shifter in REVERSE, holding the vehicle stopped with the brake.
3. Observe the backup lamps.

Do the backup lamps turn on in reverse?

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Go to Step 4

Go to Symptoms - Lighting Systems in Lighting Systems

1. Turn OFF the ignition.
2. Disconnect the rear object sensor control module connector.
3. Turn ON the ignition.
4. Test the ignition positive voltage circuit of the rear object sensor control module for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 5

Test the ground circuit of the rear object sensor control module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 6

1. Place the gear shifter in REVERSE, holding the vehicle stopped with the brake.
2. Test the backup lamp supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 7

Test the backup lamp supply voltage circuit for a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 8

Test the telltale assembly supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 9

Test the telltale assembly supply voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 10

Inspect the information center telltale assembly connector for poor connections. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 14

Go to Step 11

Replace the information center telltale assembly. Refer to Information Center Telltale Assembly Replacement .

Did you find and correct the condition?

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Go to Step 14

Go to Step 12

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

Did you find and correct the condition?

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Go to Step 14

Go to Step 13

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 14

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

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