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 latch. 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 Driver Door Cylinder Sw. parameter in the Driver Door Module, Inputs list.

Does the Driver Door Cylinder Sw. parameter display the Idle state?

Go to Step 3

Go to Step 4

1. Insert the door lock key into the driver door key cylinder, turn it to the Unlock position and hold it there for 3 to 5 seconds.
2. With the scan tool, observe the Driver Door Cylinder Sw. parameter in the Driver Door Module, Inputs list.

Does the Driver Door Cylinder Sw. parameter change to the Unlock state?

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 driver door key cylinder and the driver door lock actuator containing the driver door cylinder switch is not stuck or binding.

1. Disconnect the harness connector of the driver door cylinder switch from the driver door lock actuator.
2. With the scan tool, observe the Driver Door Cylinder Sw. parameter.

Does the scan tool display the Idle state?

Go to Step 11

Go to Step 7

5

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

1. Disconnect the harness connector of the driver door cylinder switch from the driver door lock actuator
2. Connect a 3 amp fused jumper wire between the key switch signal circuit of the harness connector and a good ground.
3. With the scan tool, observe the Driver Door Cylinder Sw. parameter.

Does the Driver Door Cylinder Sw. parameter display Unlock?

Go to Step 6

Go to Step 9

1. Connect the 3 amp fused jumper wire between the key switch signal circuit and the ground circuit of the harness connector.
2. With the scan tool, observe the Driver Door Cylinder Sw. parameter.

Does the Driver Door Cylinder Sw. parameter display Unlock?

Go to Step 11

Go to Step 8

Test the key switch signal circuit of the driver door 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 14

Go to Step 10

Test the key switch ground circuit of the driver door 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 14

Go to Step 10

Test the key switch signal circuit of the driver door for a high resistance, an open, or a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 10

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

Did you find and correct the condition?

Go to Step 14

Go to Step 12

Inspect for poor connections at the harness connector of the driver door cylinder 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 14

Go to Step 13

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

Did you complete the replacement?

Go to Step 14

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Replace the driver door lock actuator. The actuator contains the inoperative driver door cylinder switch. Refer to Front Side Door Latch Replacement .

Did you complete the replacement?

Go to Step 14

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Operate the system in order to verify the repair.

Is the repair complete?

System OK

Go to Step 2