For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Content Theft Deterrent (CTD) System Check? | -- | Go to Step 2 | Go to Content Theft Deterrent (CTD) System Check
2 | Use the key fob to lock then unlock the doors. Does the fob operate properly? | -- | Go to Step 3 | Go to Remote Keyless Entry System Check in Keyless Entry
3 |

1. Disconnect the remote function actuator (RFA) module.
2. Measure the resistance from the RFA module connector terminal E11 to ground while moving the left front door lock cylinder switch to the unlock position.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 5

Go to Step 4

4 |

1. Disconnect the LH front door lock cylinder switch.
2. Measure the resistance from the LH front door lock cylinder switch harness connector terminal A (Buick) or terminal C (Pontiac) to the RFA module connector terminal E11.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 7

Go to Step 6

5 | Measure the resistance from the RFA module connector terminal E11 to ground while moving the right front door lock cylinder switch to the unlock position. Does the resistance measure within the specified range? | 0-5 ohms | Go to Step 11 | Go to Step 10
6 | Repair the open in CKT 262. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
7 | Measure the resistance from the left front door lock cylinder switch harness connector terminal C (Buick) or terminal B (Pontiac) to ground. Does the resistance measure within the specified range? | 0-5 ohms | Go to Step 9 | Go to Step 8
8 | Repair the open in CKT 1250. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
9 | Replace the LH front door lock cylinder switch. Refer to one of the following procedures:

• | Door Lock Cylinder Replacement in Doors

• | Door Lock Cylinder Replacement in Doors

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

10 |

1. Disconnect the right front key cylinder switch.
2. Measure the resistance from the RH front door lock cylinder switch harness connector terminal A (Buick) or terminal C (Pontiac) to the RFA module connector terminal E11.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 13

Go to Step 12

11 | Test for poor terminal contact at the RFA module connector terminal E11. Is the terminal contact OK? | -- | Go to Step 16 | Go to Step 20
12 | Repair the open in CKT 262. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
13 | Measure the resistance from the right front door lock cylinder switch harness connector terminal C (Buick) or terminal B (Pontiac) to ground. Does the resistance measure within the specified range? | 0-5 ohms | Go to Step 15 | Go to Step 14
14 | Repair the open in CKT 1250. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
15 | Replace the RH front door lock cylinder switch. Refer to one of the following procedures:

• | Door Lock Cylinder Replacement in Doors

• | Door Lock Cylinder Replacement in Doors

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

16 | Test CKT 263 for a short to ground. Is the circuit OK? | -- | Go to Step 17 | Go to Step 18
17 | Test the rear compartment lid tamper switch. Is the switch OK? | -- | Go to Step 19 | Go to Step 21
18 | Repair the short to ground in CKT 263. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
19 | Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry. Is the replacement complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
20 | Repair terminal contact. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --
21 | Replace the rear compartment lid tamper switch. Is the repair complete? | -- | Go to Content Theft Deterrent (CTD) System Check | --