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

Is the red indicator on the information center telltale assembly flashing?

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Go to Step 4

Go to Symptoms - Ultrasonic Rear Parking Assist

1. Turn OFF the ignition.
2. Locate the diagnostic connector and remove the connector cover.
3. Connect a fused jumper from the diagnostic connector to ground.
4. Clear the field of vision. Specifically, this action means the following:

-	Remove all objects resting on the rear compartment lid.

-	Remove objects less than 2 meters (6.5 ft) from the rear bumper.

-	Remove objects less than 0.5 meters (1.6 ft) from the side of the vehicle.

5. Turn ON the ignition.
6. Move the gear shifter to REVERSE within five seconds.
7. Observe the telltale assembly. The following telltale pattern should appear. (This pattern indicates that the module has entered the diagnostic mode.)

•	Yellow Outside Indicator - On

•	Yellow Center Indicator - Off

•	Red Indicator - On

Did the module enter diagnostic mode?

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Go to Step 5

Go to Symptoms - Ultrasonic Rear Parking Assist

Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the backup lamp supply voltage circuit.)

Does the pattern appear?

--

Go to Step 6

Go to Step 8

Observe the vehicle backup lamps.

Are the backup lamps on when the vehicle is in reverse?

--

Go to Step 7

Go to Symptoms - Lighting Systems in Lighting Systems

1. Move the gear shifter to PARK.
2. Turn OFF the ignition.
3. Disconnect the fused jumper from the diagnostic connector.
4. Disconnect the rear object sensor control module connector.
5. Turn ON the ignition.
6. Place the gear shifter in REVERSE.
7. Test the backup lamp 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 45

Go to Step 43

1. Place the gear selector lever in PARK.
2. Turn OFF the ignition.
3. Return to rear parking assist diagnostic mode, using the procedure in step 4 of this diagnostic chart.
4. Once the rear object sensor control module is in diagnostic mode, observe the telltale assembly. Look for the following series of patterns to appear on the telltale assembly, one after the other. (This pattern signals an open circuit on the object sensor supply voltage circuit or the object sensor low reference circuit.)

•	First pattern:

•	Yellow Outside Indicator - On

•	Yellow Center Indicator - Off

•	Red Indicator - Off

•	Second pattern:

•	Yellow Outside Indicator - On

•	Yellow Center Indicator - On

•	Red Indicator - Off

•	Third pattern:

•	Yellow Outside Indicator - Off

•	Yellow Center Indicator - On

•	Red Indicator - On

•	Fourth pattern:

•	Yellow Outside Indicator - Off

•	Yellow Center Indicator - Off

•	Red Indicator - On

Does the pattern appear?

--

Go to Step 9

Go to Step 11

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

Did you find and correct the condition?

--

Go to Step 45

Go to Step 10

Test the object sensor low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

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Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the rear parking assist chime signal circuit.)

Does the pattern appear?

--

Go to Step 14

Go to Step 15

1. Move the gear shifter to PARK.
2. Turn OFF the ignition.
3. Disconnect the fused jumper from the diagnostic connector.
4. Disconnect the rear object sensor control module connector.
5. Install a scan tool.
6. Turn ON the ignition.
7. With the scan tool, select rear integration module (RIM) and choose inputs.
8. Using a fused jumper, momentarily ground the rear parking assist chime signal circuit.

Is the RIM Rear Parking Aid Input ON with the jumper connected and OFF with the jumper removed?

--

Go to Step 43

Go to Step 13

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

Did you find and correct the condition?

--

Go to Step 45

Go to Step 14

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

Did you find and correct the condition?

--

Go to Step 45

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Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the RH rear corner object sensor signal circuit.)

Does the pattern appear?

--

Go to Step 16

Go to Step 21

1. Place the gear selector lever in PARK.
2. Turn OFF the ignition.
3. Disconnect the RH rear corner object sensor.
4. Test the RH rear corner object sensor signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 17

Test the RH rear corner object sensor signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 18

Test the RH rear corner object sensor signal 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?

--

Go to Step 45

Go to Step 19

Inspect the RH rear corner object sensor 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?

--

Go to Step 45

Go to Step 20

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

Did you complete the replacement?

--

Go to Step 45

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Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the RH rear middle object sensor signal circuit.)

Does the pattern appear?

--

Go to Step 22

Go to Step 27

1. Place the gear selector lever in PARK.
2. Turn OFF the ignition.
3. Disconnect the RH rear middle object sensor.
4. Test the RH rear middle object sensor signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the circuit OK?

--

Go to Step 45

Go to Step 23

Test the RH rear middle object sensor signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 24

Test the RH rear middle object sensor signal 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?

--

Go to Step 45

Go to Step 25

Inspect the RH rear middle object sensor 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?

--

Go to Step 45

Go to Step 26

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

Did you complete the replacement?

--

Go to Step 45

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Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the LH rear middle object sensor signal circuit.)

Does the pattern appear?

--

Go to Step 28

Go to Step 33

1. Place the gear selector lever in PARK.
2. Turn OFF the ignition.
3. Disconnect the LH rear middle object sensor.
4. Test the LH rear middle object sensor signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 29

Test the LH rear middle object sensor signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 30

Test the LH rear middle object sensor signal 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?

--

Go to Step 45

Go to Step 31

Inspect the LH rear middle object sensor 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?

--

Go to Step 45

Go to Step 32

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

Did you complete the replacement?

--

Go to Step 45

--

Observe the telltale assembly. Look for the following pattern. (This pattern signals a fault on the LH rear corner object sensor signal circuit.)

Does the pattern appear?

--

Go to Step 34

Go to Step 39

1. Place the gear selector lever in PARK.
2. Turn OFF the ignition.
3. Disconnect the LH rear corner object sensor.
4. Test the LH rear corner object sensor signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 35

Test the LH rear corner object sensor signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 36

Test the LH rear corner object sensor signal 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?

--

Go to Step 45

Go to Step 37

Inspect the LH rear corner object sensor 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?

--

Go to Step 45

Go to Step 38

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

Did you complete the replacement?

--

Go to Step 45

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Observe the telltale assembly. Look for the following pattern. (This pattern signals a short to ground on the object sensor supply voltage circuit, a short to battery positive voltage on the object sensor low reference circuit or a fault with the rear object sensor control module.)

Does the pattern appear?

--

Go to Step 40

Go to Step 45

Test the object sensor 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?

--

Go to Step 45

Go to Step 41

Test the object sensor low reference 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?

--

Go to Step 45

Go to Step 42

Test for a short from the object sensor supply voltage circuit to the object sensor low reference circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 45

Go to Step 43

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?

--

Go to Step 45

Go to Step 44

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

Did you complete the replacement ?

--

Go to Step 45

--

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

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