For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
The remote keyless entry/power door lock system will operate erratically when an open is present in any one of the control circuits to the remote control door lock receiver. Swapping the LOCK relay with the UNLOCK relay and noting if the symptom changes can provide a quick test of the relay operation.
1 | Did you review the Keyless Entry System Description , Keyless Entry System Operation and Keyless Entry System Circuit Description and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Doors
2 | Operate the door locks. Note which locks operate and which locks do not operate from both the door switch and the remote keyless entry transmitter. Is the condition present? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 | Is the LOCK function inoperative from the door switch and the transmitter? | Go to Step 10 | Go to Step 4
4 | Is the UNLOCK function operative on the driver's door only from the door switch and the transmitter? | Go to Step 15 | Go to Step 5
5 | Is the LOCK function inoperative from the transmitter? | Go to Step 20 | Go to Step 6
6 | Is the UNLOCK function operative on the driver's door only from the transmitter? | Go to Step 21 | Go to Step 7
7 | Is the UNLOCK function inoperative on the driver's door lock from the door switch and operative on the driver's door lock from the transmitter? | Go to Step 22 | Go to Step 8
8 | Is the LOCK function inoperative on the driver's door only from the door switch and the UNLOCK function inoperative from the transmitter? | Go to Step 23 | Go to Step 9
9 | Is the UNLOCK function inoperative on the driver's door only from the door switch and all functions inoperative from the transmitter? | Go to Step 24 | Go to Step 26
10 |

1. Disconnect the remote control door lock receiver.
2. Remove the door LOCK relay.
3. Test for an open in the PNK wire between terminal 3 of the door LOCK relay and terminal R of the remote control door lock receiver.

Is an open present?

Go to Step 11

Go to Step 12

11 | Repair the open in the PNK wire between the door LOCK relay and cavity R of the remote control door lock receiver. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 28 | --
12 | Test for an open in the BLK wire between terminal 4 and terminal 5 of the door LOCK relay. Is an open present? | Go to Step 13 | Go to Step 14
13 | Repair the open in the BLK wire between the door LOCK relay terminal 5 and terminal 4. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 28 | --
14 | Replace the door LOCK relay. Is the repair complete? | Go to Step 28 | --
15 |

1. Disconnect the remote control door lock receiver.
2. Remove the door UNLOCK relay.
3. Test for an open in the PNK/GRN wire between terminal 3 of the door UNLOCK relay and terminal B of the remote control door lock receiver.

Is an open present?

Go to Step 16

Go to Step 17

16 | Repair the open in the PNK/GRN wire between the door UNLOCK relay and S228. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 28 | --
17 | Test for an open in the BLK wire between terminal 4 and terminal 5 of the door UNLOCK relay. Is an open present? | Go to Step 18 | Go to Step 19
18 | Repair the open in the BLK wire between the door UNLOCK relay terminal 5 and terminal 4. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 28 | --
19 | Replace the door UNLOCK relay. Is the repair complete? | Go to Step 28 | --
20 | Test for an open in the PNK wire between the remote control door lock receiver terminal 15 and S226. Is an open present? | Go to Step 25 | Go to Step 26
21 | Test for an open in the RED/WHT wire between the remote control door lock receiver terminal 14 and S222. Is an open present? | Go to Step 25 | Go to Step 26
22 | Test for an open in the PNK/GRN wire between the remote control door lock receiver terminal 7 and S228. Is an open present? | Go to Step 25 | Go to Step 26
23 | Test for an open in the BLK wire between the remote control door lock receiver terminal 13 and G201. Is an open present? | Go to Step 25 | Go to Step 26
24 | Test for an open in the RED/WHT wire between S221 and S222. Is an open present? | Go to Step 25 | Go to Step 26
25 | Repair the open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 28 | --
26 | Backprobe the remote control door lock receiver with a digital multimeter to ground. Refer to Symptoms - Doors for normal results. Are the voltage measurements correct? | Go to Step 3 | Go to Step 27
27 | Replace the remote control door lock receiver. Refer to Door Control Module Replacement . Is the repair complete? | Go to Step 28 | --
28 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3