Scheme 44
Scheme 44: Keyless Entry Schematics
Scheme 45
Scheme 45: Keyless Entry Component Views
| Callout | Component Name |
|---|
| 1 | Liftgate Module (LGM)/ Remote Function Actuator |
| 2 | Liftgate |
Test Description
The number(s) below refer to the step number(s) 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.
- 5: 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.
| 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 (BCM). Does the scan tool communicate with the LGM? | Go to Step 3 | Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE (W/O IMMOBILIZER) in Data Link Communications |
| 3 | IMPORTANT: The engine may start during the following step. Turn OFF the engine as soon as you have observed the Crank power mode. Access the Class 2 Power Mode in the Diagnostic Circuit Check on the scan tool. Rotate the ignition switch through all positions while observing the ignition switch power mode parameter. Does the ignition switch parameter reading match the ignition switch position for all switch positions? | Go to Step 4 | Go to POWER MODE MISMATCH in Body Control System |
| 4 | Select the Body Control Module display DTCs function on the scan tool. Does the scan tool display any DTCs? | Go to Step 5 | Go to Symptoms - Keyless Entry |
| 5 | Does the scan tool display any DTCs which begin with a "U"? | Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE (W/O IMMOBILIZER) in Data Link Communications | Go to Step 6 |
| 6 | Does the scan tool display DTC B1000? | Go to DIAGNOSTIC TROUBLE CODE (DTC) LIST in Body Control System | Go to Step 7 |
| 7 | Does the scan tool display DTC B1327 or B1372? | Go to DIAGNOSTIC TROUBLE CODE (DTC) LIST in Engine Electrical | Go to Symptoms - Keyless Entry |
| IMPORTANT |
|---|
| The engine may start during the following step. Turn OFF the engine as soon as you have observed the Crank power mode. |
Diagnostic System Check - Remote Keyless Entry
Symptoms - Keyless Entry
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform «Diagnostic System Check - Remote Keyless Entry»(ref-190235-S30077577012005091300000) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) 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-190235-S37896528502005091300000) .
Unlock All Doors-Second Operation
Momentarily press the UNLOCK button a second time (within 2 seconds of the first press) in order to perform the following functions
- Unlock the remaining doors.
- Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned to the RUN position with a valid key.
- Flash the exterior lights, if selected ON in personalization.
- Chirp the horn, if selected ON in personalization.
- Recall the memory seat and memory mirror positions for that driver.
