GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 DeVille 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Ignition Can/Cannot Be Turned Off with Transmission in Any Gear

Test Description

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

  1. Listen for an audible click when the lock cylinder relay operates. Command both the ON and OFF states. Repeat the commands as necessary.

    2.

  2. This step tests for voltage at the coil side of the lock cylinder relay.

    3.

  3. This step verifies that the rear integration module (RIM) is providing ground to the lock cylinder relay.

    4.

  4. This step tests if ground is constantly being applied to the lock cylinder relay.

Step

Action

Yes

No

Schematic Reference: Column/Ignition Lock Schematics

Connector End View Reference: Steering Wheel and Column Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Push the ignition lock cylinder control actuator release button which is on the underside of the ignition key cylinder.
  2. Turn the key to the OFF position and remove the key.

Were you able to turn the key to the OFF position and remove the key?

Go to Step 3

Go to Lock System Does Not Lock

3

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the lock cylinder relay ON and OFF.

Does the lock cylinder relay turn ON and OFF with each command?

Go to Step 7

Go to Step 4

4

  1. Turn OFF the ignition.
  2. Disconnect the lock cylinder relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the battery positive voltage circuit of the lock cylinder relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 15

5

  1. Connect a test lamp between the control circuit of the lock cylinder relay and the battery positive voltage circuit of the lock cylinder relay.
  2. With a scan tool, command the lock cylinder relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 12

Go to Step 6

6

Does the test lamp remain illuminated with each command?

Go to Step 10

Go to Step 9

7
  1. Disconnect the park lock solenoid.
  2. Connect a test lamp between the battery positive voltage and ground circuits of the park lock solenoid.
  3. With a scan tool, command the lock cylinder relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 13

Go to Step 8

8

Connect a test lamp between the park lock solenoid ground circuit and battery positive voltage.

Does the test lamp illuminate?

Go to Step 11

Go to Step 16

9

Test the control circuit of the lock cylinder relay for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 14

10

Test the control circuit of the lock cylinder relay 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 20

Go to Step 14

11

Test the of the battery positive voltage circuit of the park lock solenoid for an open, a short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 12

12

Inspect for poor connections at the lock cylinder relay. 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 20

Go to Step 17

13

Inspect for poor connections at the park lock solenoid. 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 20

Go to Step 18

14

Inspect for poor connections at the harness connector of the rear integration module (RIM). 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 20

Go to Step 19

15

Repair the battery positive voltage circuit of the lock cylinder relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

--

16

Repair the ground circuit of the park lock solenoid. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

--

17

Replace the lock cylinder relay.

Did you complete the replacement?

Go to Step 20

--

18

Replace the ignition lock cylinder control actuator. Refer to Ignition Lock Cylinder Case Replacement .

Did you complete the replacement?

Go to Step 20

--

19

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Computer/Integrating Systems.

Did you complete the replacement?

Go to Step 20

--

20

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3