Keyless Entry System Inoperative
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit/system Description
The keyless entry system is a vehicle entry device. The keyless entry will unlock the vehicle doors or open the rear compartment when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the keyless entry transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a message over the GMLAN serial data line. A low transmitter battery or radio frequency (RF) interference from aftermarket devices such as 2-way radios, power inverters, cellular phone chargers, computers, etc. may cause a system malfunction. High RF traffic areas, such as gas stations which use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction.
Diagnostic Aids
| • | For the J 43241 Keyless Entry Tester, inspect the keyless entry transmitter part number to determine that it is the correct model for the vehicle. A wrong model transmitter may pass the test, but it will not activate the vehicle remote system. |
| • | The keyless entry transmitter used in the 2 Way Advanced Remote Start System is unique to the system. When servicing or replacing a transmitter, ensure that the correct trasmitter is used. The correct transmitter part number can be found in the Accessory section of the parts catalog. Attempting to replace an 2 Way Advanced Remote Start transmitter with a regular service part may result in a failure to program the trasmitter. |
Reference Information
Schematic Reference
Remote Function Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Keyless Entry System Description and Operation
Electrical Information Reference (Except Opel Gt)
| • | Testing for Intermittent Conditions and Poor Connections |
Scan Tool Reference
Control Module References for scan tool information
Special Tools
J 43241 Keyless Enter Tester
Circuit/system Verification
Attempt to program the keyless entry transmitter, refer to Transmitter Programming . The transmitter should program.
Circuit/system Testing
- Verify that the transmitter is the correct transmitter for the vehicle.
- Verify the scan tool FOB Programmed parameter for the appropriate transmitter is Yes.
- Place the transmitter on the test pad of the J 43241 and press each transmitter button one at a time. The tester should sound a tone and illuminate a green light with each button press.
- Operate the transmitter while observing the scan tool Fob Function parameter for the appropriate transmitter. The parameter should correspond with the function selected on the transmitter.
- If all circuits test normal, replace the RCDLR.
Repair Instructions
Important: This vehicle may be equipped with the 2 Way Advanced Remote Start System. Vehicle equipped with the 2 Way Advanced Remote Start System can be identified by an LCD screen on the keyless entry transmitter or a yellow label on the RCDLR. When servicing the 2 Way Advanced Remote Start System, ensure that the correct parts are installed during replacement. Service parts for the 2 Way Advanced Remote Start System can be found in the Accessory section of the parts manual.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for RCDLR replacement, setup, and programming |
