Scheme 11
Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
- 4: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
- 5: Any other body control module DTCs displayed by the scan tool do not apply to Remote Keyless Entry and should be diagnosed in the applicable section.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Install a scan tool. Does the scan tool power up? | Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 | Turn ON the ignition, with the engine OFF. Attempt to establish communication with the body control module. Does the scan tool communicate with the body control module? | Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 3 | Select the BCM display DTCs function on the scan tool. Does the scan tool display any DTCs? | Go to Step 4 | Go to Symptoms - Keyless Entry |
| 4 | Does the scan tool display any DTCs which begin with a "U"? | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | Go to Step 5 |
| 5 | Does the scan tool display DTC B3109? | Go to Diagnostic Trouble Code (DTC) List | Go to Symptoms - Keyless Entry |
Diagnostic System Check - Remote Keyless Entry
The number(s) below refer to the step number(s) on the diagnostic table.
- 2: This step identifies the transmitter with a low battery signal.
- 4: This step verifies that the battery replacement corrected the fault.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Remote Keyless Entry |
| 2 | With a scan tool, clear the DTC. Press a button on each of the transmitters while monitoring the scan tool body control module (BCM) DTC list. Does the scan tool indicate that DTC B3109 reset when the button was pressed on any of the transmitters? | Go to Step 3 | Go to Testing for Intermittent and Poor Connections in Wiring Systems |
| 3 | Replace the battery on the transmitter(s) that reset DTC B3109. Refer to Transmitter Battery Replacement. Did you complete the battery(s) replacement? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTCs. Operate the transmitter(s) that had the battery replaced. Does the DTC reset? | Go to Step 5 | Go to Step 8 |
| 5 | Replace the transmitter(s). Ensure that the replacement transmitter(s) is the correct model for the vehicle. All transmitters must be programmed at the same time. Refer to Transmitter Programming. Did you complete the replacement? | Go to Step 6 | |
| 6 | Use the scan tool in order to clear the DTCs. Operate the replaced transmitter(s) 3 consecutive times. Does the DTC reset? | Go to Step 8 | Go to Step 7 |
| 7 | IMPORTANT: When replacing the BCM, perform the transmitter programming procedure. Replace the BCM. Refer to in Body Control Systems.Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
| IMPORTANT |
|---|
| When replacing the BCM, perform the transmitter programming procedure. |
DTC B3109
Symptoms - Keyless Entry
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform «Diagnostic System Check - Remote Keyless Entry»(ref-188793-S21183092732005090200000) before using the Symptom Tables in order to verify that all of the following are true: No DTCs are set. The control modules can communicate via the serial data link.
- Review the system operation in order to familiarize yourself with the system functions. Refer to «Keyless Entry System Description and Operation»(ref-188793-S37567117142005090200000) .
Unlock All Doors (Second Operation)
Momentarily press the UNLOCK button a second time (within 5 seconds of the first press) in order to perform the following functions
- Unlock the remaining doors.
- Illuminate the interior lamps for approximately 20 seconds or until the ignition is turned ON.
- Flash the daytime running lamps twice (if selected ON in personalization).
- Chirp the horn twice (if selected ON in personalization).