For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Theft Deterrent System Schematics Connector End View Reference: Component Connector End Views DEFINITION: The content theft deterrent (CTD) system will not ARM or DISARM properly.
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Important: When the CTD system is armed, the vehicle will confirm by chirping the alarm and flashing the turn signals once.

1. Open the driver and passenger windows.
2. Remove the keys from the ignition.
3. Close all the doors, rear compartment and the hood.
4. Lock the doors with the transmitter. (Arm the system.)

Did the CTD system arm?

Go to Step 3

Go to Step 4

3 | Important: When the CTD system is disarmed, the vehicle will confirm by flashing the turn signals twice. With the system still armed, unlock a door with the key. Does the CTD system disarm? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Content Theft Deterrent (CTD) Does Not Disarm with Key Lock
4 | Test for a poor connection at the theft deterrent alarm. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 5 | Go to Symptoms - Lighting Systems
5 |

1. Switch the dome lamp to the center position (DOOR).
2. Unlock the doors with the transmitter.
3. Observe the courtesy lamps.
4. Open and close each door.

Do the courtesy lamps illuminate for all doors?

Go to Step 9

Go to Step 6

6 |

1. Disconnect the hood switch.
2. Attempt to arm the CTD system.

Does the CTD system arm?

Go to Step 11

Go to Step 7

7 | Test for a short to ground in the hood switch signal circuit. Refer to Testing for Short to Ground and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 8
8 | Test for a poor connection at the intelligent switching unit (ISU). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 12
9 | Test for a short to ground in the key reminder circuit. Refer to Testing for Short to Ground and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 10
10 | Replace the ignition switch. Refer to Ignition Lock Cylinder Replacement . Did you complete the replacement? | Go to Step 13 | --
11 | Replace the hood switch. Refer to Hood Ajar Indicator Lamp Switch Replacement . Did you complete the replacement? | Go to Step 13 | --
12 | Important: Perform the program procedure for the ISU. Replace the ISU. Did you complete the replacement? | Go to Step 13 | --
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2