Schematic Reference: Door Control Module Schematics and Door Lock/Indicator Schematics

DEFINITION: Doors do not unlock from the driver door cylinder switch, which is a built in part of the door lock actuator. It is activated by a rod connected to the door lock key cylinder mounted on the exterior of the driver door.

1

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 data list.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

1. Insert the door key into the outside driver 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 Driver Door Cylinder Sw. parameter.

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

Go to Testing for Electrical Intermittents in Wiring Systems

Go to Step 5

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

1. Disconnect the driver door cylinder switch harness connector from the driver door lock actuator.
2. With the scan tool, observe the Driver 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 driver door lock cylinder and the driver door lock actuator containing the driver door cylinder switch is not loose or unfastened.

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

Does the scan tool display Unlock?

Go to Step 10

Go to Step 7

Test the driver door key 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 driver door key 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 driver door key switch low reference 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 harness connector of the driver door 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 13

Go to Step 11

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 13

Go to Step 12

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

Did you complete the replacement?

Go to Step 13

--

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

Did you complete the replacement?

Go to Step 13

--

Operate the system to verify the repair.

Is the repair complete?

System OK

Go to Step 2