The keyless entry system is a vehicle entry device. Keyless entry will unlock the vehicle doors when a corresponding button on the remote-key is pressed. This is accomplished by the remote-key sending a radio frequency to the steering column module (CIM). The CIM interprets the signal and activates the requested function. A low remote-key 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.

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

Scan Tool Reference

Control Module References for scan tool information

Special Tools Required

J 43241 Keyless Entry Tester

1. Place the remote-key on the test pad of the J 43241 and press each button of the remote-key one at a time. The tester should sound a tone and illuminate a green light when each button is pressed.

⇒	If one or more buttons does not sound the tone and illuminate the green light, replace the remote-key battery and retest with the J 43241 . If the condition continues after battery replacement, replace the remote-key.

2. Verify the scan tool Transponder Key parameter for the appropriate remote-key is Programmed.

⇒	If not the specified value, program the remote-key. Refer to Replacing Keys.

3. Operate the remote-key while observing the scan tool Remote Key Function parameters. The parameter should correspond with the function selected on the remote-key.

⇒	If the parameter does not match the function selected on the remote-key, program the remote-key and retest. Refer to Replacing Keys. If the condition continues after remote-key programming, replace the remote-key.

4. If all circuits test normal, replace the CIM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.