For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: The content theft deterrent system is unable to flash the exterior lights when setting off the alarm.
1 | Test the exterior lights by turning the headlamp switch to the PARK position. Do the exterior lights turn on? | -- | Go to Step 2 | Go to Step 10
2 | Execute the following actions in order to perform the BCM Input/Output test:

1. Turn off the I/P dimmer switch.
2. Turn the ignition switch to the LOCK position.
3. Remove the BCM PRGRM fuse.
4. Turn the ignition switch to the ACC position. The BCM sounds 4 chimes, indicating the BCM type installed on the vehicle.
5. Within 1 second, turn the ignition switch from the ACC position to the LOCK position and back to the ACC position.

The BCM sounds any stored DTCs.

6. Turn the I/P dimmer switch to the DOME position.

The BCM enters the Input/Output test.

7. Cycle the IP dimmer switch from the DOME position to the OFF position and back to the DOME position in order to move to the next test.

The BCM runs the Input/Output test in numerical order.

The BCM flashes the fasten belts indicator and sounds the chime a number equivalent to the Input/Output test number:

• | Test 1 de-energizes CKT 1393 (protected courtesy light output).

• | Test 2 energizes CKT 1393.

• | Test 3 grounds CKT 690 (courtesy lights control).

• | Test 4 turns on the exterior lights.

• | Test 5 sounds the horn relay for 25 ms.

• | Test 6 turns on the security indicator lamp.

• | Test 7 turns off the theft security indicator lamp.

Do the exterior lights turn on when the BCM performs test 4?

--

Go to Step 8

Go to Step 3

3 | Did you perform the Body Control Module Diagnostic System Check? | -- | Go to Step 4 | Go to Diagnostic System Check - Body Control System in Body Control Systems
4 |

1. Disconnect the BCM connector C2.
2. Use a 10A fused jumper in order to connect between the following components:

• | The BCM harness connector C2 terminal D11

• | Ground

Upon connecting the fused jumper, do the exterior lights turn on?

--

Go to Step 9

Go to Step 5

5 |

1. Disconnect the theft deterrent relay. Refer to in Body Control System.
2. Use a test lamp in order to connect between the theft deterrent relay harness connector terminal B3 and ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 11

6 | Use a 20A fused jumper in order to connect between the theft deterrent relay harness connector terminal B1 and terminal C3. Are the exterior lights on? | -- | Go to Step 7 | Go to Step 12
7 |

1. Remove the fused jumper.
2. Use a J 39200 digital multimeter (DMM) in order to measure the resistance between the theft deterrent relay harness connector terminal C1 and the BCM harness connector C2 terminal D11.

Is the resistance less than the specified value?

2 ohms

Go to Step 16

Go to Step 13

8 |

1. Turn the ignition switch to the LOCK position.
2. Reinstall the BCM PRGRM fuse.
3. Perform the Content Theft Deterrent (CTD) System Check .

Does the content theft deterrent system work as described in the Content Theft Deterrent System Check?

--

Go to Step 14

Go to Step 15

9 |

1. Reconnect the BCM connector C2.
2. Perform the Content Theft Deterrent (CTD) System Check .

Does the content theft deterrent system work as described in the Content Theft Deterrent System Check?

--

Go to Step 14

Go to Step 15

10 | The content theft deterrent system is unable to turn on the exterior lights during an alarm event due to a malfunction with the vehicle exterior lights. Refer to Exterior Lights System Check in Lighting Systems. Is the action complete? | -- | Go to Step 17 | --
11 | Repair the following conditions in CKT 1340:

• | A poor connection

• | An open

Is the repair complete?

--

Go to Step 17

--

12 | Repair the following conditions in CKT 9:

• | A poor connection

• | An open

Is the repair complete?

--

Go to Step 17

--

13 | Repair the following conditions in CKT 301:

• | A poor connection

• | An open

Is the repair complete?

--

Go to Step 17

--

14 | A malfunction is not present at this time. Refer to Content Theft Deterrent (CTD) Circuit Description . Is the action complete? | -- | Go to Step 17 | --
15 |

• | Inspect the BCM connector C2 terminal D11 for a poor terminal contact.

• | If the connector is OK, then replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Is the repair complete?

--

Go to Step 17

--

16 | Replace the theft deterrent relay. Is the repair complete? | -- | Go to Step 17 | --
17 |

1. Turn the ignition switch to the LOCK position.
2. Reinstall the connectors/components removed.
3. Turn the ignition switch to the RUN position for 6 seconds.
4. Turn the ignition switch to the LOCK position.
5. Remove the BCM PRGRM fuse.
6. Turn the ignition switch to the ACC position. (The BCM flashes the fasten belts indicator and sounds the chime four times identifying the BCM type installed on the vehicle.)
7. Within 1 second, turn the ignition switch from the ACC position, to the LOCK position, then back to the ACC position. (The BCM sounds any DTCs stored.)

Are there any BCM DTCs present?

--

Go to Diagnostic System Check - Body Control System in Body Control System

Go to Content Theft Deterrent (CTD) System Check