Was the entire Backup Lights System Check performed?

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Go to Step 2

Go to Backup Lamp System Check

Check the rear fuse block NSBU fuse for an open?

Is the NSBU fuse OK?

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Go to Step 3

Go to Step 10

1. Connect a scan tool to the data link connector (DLC).
2. Select OUTPUT CONTROLS from the rear integration module (RIM) SPECIAL FUNCTIONS.
3. Command the backup lights to turn on.

Do the backup lights turn on?

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Go to Functional Test in Automatic Transaxle - 4T80 - E

Go to Step 4

1. Select INPUTS from the rear integration module (RIM) DATA DISPLAY
2. Place the gear selector in the REVERSE position.

Does the scan tool show that the reverse relay output is on?

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Go to Step 5

Go to Functional Test in Automatic Transaxle - 4T80 - E

Backprobe the rear fuse block with a DMM from connector C1 cavity B7 (DK GRN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 15

1. Turn the ignition switch to the ON position.
2. Place the gear selector in the REVERSE position.
3. Backprobe the rear fuse block with a DMM from connector C1 cavity B7 (DK GRN) to ground.

Is the voltage less than the specified value?

0.5 V

Go to Step 7

Go to Step 16

Backprobe the rear fuse block with a DMM from connector C1 cavity C8 (LT GRN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 8

Go to Step 15

1. Disconnect connector C402.
2. Backprobe connector C402 with a DMM from cavity B (BLK) to cavity C (LT GRN).

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 14

Inspect CKT 24 (LT GRN) between connector C402 and splice S410 for an open. Refer to Testing for Continuity in Wiring Systems.

Was an open found?

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Go to Step 12

Go to Step 13

1. Disconnect the rear fuse block connector C1.
2. Disconnect the LH and RH backup lamp connectors.
3. Backprobe with a DMM from the rear fuse block connector C1 cavity C8 (LT GRN) to ground.

Is the resistance less than the specified value?

OL

Go to Step 12

Go to Step 11

Replace the rear fuse block.

Is the rear fuse block replacement complete?

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Go to Backup Lamp System Check

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Repair the open or short to ground in CKT 24 (LT GRN) between connector C402 and splice S410. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

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Go to Backup Lamp System Check

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Repair the open in CKT 850 (BLK) between connector C402 and splice S413. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

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Go to Backup Lamp System Check

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Repair the open in CKT 650 (BLK) between connector C402 and ground G402. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Backup Lamp System Check

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Replace the REVERSE relay in the rear fuse block.

Is the relay replacement complete?

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Go to Backup Lamp System Check

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

Is the RIM replacement complete?

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Go to Backup Lamp System Check

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