Schematic Reference: Door Lock/Indicator Schematics

DEFINITION: Door locks do not operate from the door lock cylinder switch, which is a built in part of the door lock actuator. It is activated by a rod connected to the door lock cylinder mounted on the exterior of the door. This test assumes that all DTCs have been diagnosed.

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

1. Install a scan tool.
2. With the scan tool, observe the appropriate Door Cylinder Sw. parameter in the Driver Door Module, Inputs list.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

1. Insert the door key into the inoperative outside door lock cylinder.
2. Turn the key to the Unlock position and hold it there for 3-5 seconds.
3. With the scan tool, observe the appropriate Door Cylinder Sw. parameter.

Does the scan tool display Unlock?

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

Go to Step 5

Important:: Check to make sure that the linkage between the door key cylinder and the door lock actuator containing the door cylinder switch is not stuck or binding.

1. Disconnect the inoperative door cylinder switch harness connector from the associated door lock actuator
2. With the scan tool, observe the appropriate Door Cylinder Sw. parameter.

Does the scan tool display Idle?

Go to Step 10

Go to Step 6

Important:: Check to make sure that the linkage between the door key cylinder and the door lock actuator containing the door cylinder switch is not loose or unfastened.

1. Disconnect the inoperative door cylinder switch harness connector from the associated door lock actuator.
2. Install a 3-amp fused jumper between the door cylinder switch circuits of the harness connector.
3. With the scan tool, observe the appropriate Door Cylinder Sw. parameter.

Does the scan tool display Unlock?

Go to Step 10

Go to Step 7

Test the appropriate door cylinder switch 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 13

Go to Step 9

Test the appropriate door cylinder switch signal circuit for an open, or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 8

Test the appropriate door cylinder switch ground circuit for an open, or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 9

Inspect for poor connections at the appropriate door module harness connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 11

Inspect for poor connections at the appropriate door cylinder switch harness connector. 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 13

Go to Step 12

Replace the inoperative door module. Refer to Door Control Module Replacement .

Did you complete the replacement?

Go to Step 13

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Replace the inoperative door lock actuator (it contains the door cylinder switch). Refer to Front Side Door Latch Replacement .

Did you complete the replacement?

Go to Step 13

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2