Power Door Locks Inoperative - Deadbolt. Cadillac CTS 2007

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2007 🢒 CTS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Power Door Locks Inoperative - Deadbolt

Diagnostic Aids

Central Door Lock and Deadbolt functions are controlled by the rear integration module (RIM), the individual door modules and lock actuators, the driver door key lock cylinder, which is mounted in the driver door, and the key cylinder lock switch, which is contained within the driver door lock actuator. For more information on door lock features, refer to Power Door Locks Description and Operation .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step verifies that the keyless entry remote transmitter is functional for the test procedures that follow in steps 7 and 8. The remote transmitter must be used in place of the driver door key cylinder when it is the driver door deadbolt motor being tested in step 8.

This step determines if the deadbolt motor has failed.

If it is a passenger door deadbolt being tested in this step, either the driver door key cylinder, or the keyless entry remote transmitter may be used to activate the deadbolt. However, if it is the driver door deadbolt being tested in this step, the driver door key cylinder cannot be used to activate the deadbolt because the lock actuator connector containing the key cylinder input circuit has been disconnected in step 7.

Care must be taken when observing the test lamp and attempting to activate the deadbolt motor from either the remote transmitter, or the driver door key cylinder. If you are using the remote transmitter, press the transmitter lock button twice within 3 seconds. The test lamp should flash once. If you are using the driver door key cylinder, either turn the key to the lock position and hold it there for 3 seconds or longer or turn it to the lock position twice within 3 seconds. The test lamp should flash once. Repeating either of these activations, however, will not produce another flash of the test lamp until the door has been commanded to undeadbolt. For either method of activation, remember that the door must be commanded to undeadbolt between each deadbolt command in order for the test to be accurate. Failure to follow these guidelines may result in misdiagnosis and the unnecessary replacement of parts.

This step determines if it is the door module or a deadbolt motor control circuit that has failed.

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Vehicle Access Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Review the Central Door Lock and Deadbolt section of the Power Door Locks Description and Operation in order to verify that the Power Door Locks Inoperative - Deadbolt complaint is present. Refer to Power Door Locks Description and Operation . Does the Central Door Lock and Deadbolt system operate as described in the Description and Operation?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Install a scan tool. With the scan tool, observe the Key Cylinder Lock/Unlock parameter in the Driver Door Module (DDM), Inputs list. Insert the door key into the driver door lock cylinder, turn and hold it to the lock position for 3 seconds. Does the Key Cylinder Lock/Unlock parameter change from Idle to the appropriate state?	Go to Step 4	Go to Step 5
4	Verify that the door locks can be operated from the keyless entry remote transmitter. Do the door locks operate when using the remote transmitter?	Go to Step 7	Go to Keyless Entry System Inoperative
5	Turn OFF the ignition. Disconnect the harness connector from the driver door lock actuator. Turn ON the ignition, with the engine OFF. Install a 3-amp fused jumper wire between the key cylinder lock switch signal circuit and the key cylinder lock switch ground circuit of the harness connector. With the scan tool, observe the Key Cylinder Lock/Unlock parameter. Does the Key Cylinder Lock/Unlock parameter change from Idle to the appropriate state?	Go to Step 13	Go to Step 6
6	Install a 3-amp fused jumper wire between the key cylinder lock switch signal circuit and a good ground. With the scan tool, observe the Key Cylinder Lock/Unlock parameter. Does the Key Cylinder Lock/Unlock parameter change from Idle to the appropriate state?	Go to Step 10	Go to Step 9
7	Turn OFF the ignition. Disconnect the harness connector from the door lock actuator associated with the inoperative deadbolt motor. Turn ON the ignition, with the engine OFF. Connect a test lamp between the deadbolt motor control circuit of the harness connector and a good ground. Does the test lamp illuminate?	Go to Step 11	Go to Step 8
8	Make sure the door associated with the inoperative deadbolt motor locks and unlocks properly. Make sure the test lamp is still connected between the deadbolt motor control circuit of the harness connector and a good ground. If the door being tested is the driver door, attempt to deadbolt the door by pressing the lock button on the keyless entry remote transmitter twice within 3 seconds. If the door being tested is one of the passenger doors, attempt to deadbolt the door by using either the remote transmitter or the driver door key cylinder. Did the test lamp flash once?	Go to Step 14	Go to Step 12
9	Test the key cylinder lock switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 15
10	Test the key cylinder lock switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 15
11	Test the deadbolt lock motor control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 16
12	Test the deadbolt lock motor control circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 16
13	Inspect for poor connections at the harness connector of the driver door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 17
14	Inspect for poor connections at the harness connector of the appropriate door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 18
15	Inspect for poor connections at the harness connector of the DDM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 20
16	Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 21	Go to Step 19
17	Replace the driver door lock actuator. Refer to Front Side Door Latch Replacement . Did you complete the replacement?	Go to Step 21	--
18	Replace the appropriate door lock actuator. Refer to Front Side Door Latch Replacement . Did you complete the replacement?	Go to Step 21	--
19	Replace the door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 21	--
20	Replace the door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 21	--
21	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2