Schematic Reference: Door Lock/Indicator Schematics , Body Control System Schematics and Power Distribution Schematics

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

Verify that the automatic door locks are enabled. Refer to Driver Personalization in Personalization.

Are the automatic door locks enabled?

Go to Step 3

Go to Driver Personalization Personalization

Verify that the automatic door locks inoperative fault is present.

Does the automatic door locks system operate normally?

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

Go to Step 4

Verify that the power door locks system operates properly.

Does the power door locks system operate normally?

Go to Step 5

Go to Symptoms - Doors

1. Turn the iignition on, with the engine off.
2. With a scan tool, observe the run/crank parameter in the Body Control Module data list.

Does the scan tool indicate On?

Go to Step 7

Go to Step 6

1. Turn off the ignition.
2. Disconnect the BCM C1 harness connector.
3. Turn the iignition on, with the engine off.
4. Probe the crank positive voltage circuit of the BCM C1 harness connector with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 14

Go to Step 11

1. Connect the BCM C1 harness connector.
2. With a scan tool, observe the park position switch parameter in the Body Control Module data list.
3. Place the gear shift lever in Drive.

Does the scan tool indicate Off?

Go to Step 9

Go to Step 8

1. Turn off the ignition.
2. Disconnect the automatic transmission shift lock control switch harness connector.
3. Turn the iignition on, with the engine off.
4. Probe the gear out of position signal circuit of the automatic transmission shift lock control switch harness connector with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 15

Go to Step 12

1. With a scan tool, observe the door jamb switch parameter in the Body Control Module data list.
2. Close all the doors.

Does the scan tool indicate Off?

Go to Step 14

Go to Step 10

1. With a scan tool, observe the door jamb switch parameter in the Body Control Module data list.
2. Disconnect each of the door jamb switch harness connectors one at a time, reconnecting the harness connector after observing the parameter.

Does the scan tool indicate Off?

Go to Step 16

Go to Step 13

Test the crank positive 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 22

Go to Step 17

Test the gear out of position 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 22

Go to Step 14

Test the door open 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 22

Go to Step 14

Inspect for poor connections at the harness connector of the body control module. 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 22

Go to Step 18

Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. 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 22

Go to Step 19

Inspect for poor connections at the harness connector of the appropriate door jamb switch. 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 22

Go to Step 20

Inspect for poor connections at the harness connector of the ignition switch. 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 22

Go to Step 21

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 22

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Replace the automatic transmission shift lock control switch. Refer to Shift Control Lever Replacement in Automatic Transmission - 4L30 - E.

Did you complete the replacement?

Go to Step 22

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Replace the appropriate door jamb switch. Refer to Door Jamb Switch Replacement .

Did you complete the replacement?

Go to Step 22

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Replace the ignition switch. Refer to Ignition Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

Go to Step 22

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2