Keyless Entry System Inoperative (Passive)
Keyless Entry System Inoperative (Passive)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The passive keyless entry antennas are used as short range low frequency (LF) transmitters. As a vehicle with locked doors is approached with a key fob and the exterior door handle switch is pressed, the keyless entry antenna transmitter broadcasts a challenge to the key fob in an approximately 1 meter range. If the response from the key fob via radio frequency (RF) is valid, the locked door will be passively unlocked/unlatched and allow the door to be opened. 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.
Reference Information
Schematic Reference
Remote Function Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
Keyless Entry System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for Scan Tool Information
Special Tools
J 43241 Keyless Enter Tester
Circuit/System Verification
1. Ignition On, observe the scan tool Ext. LF Door Handle Switch, RF Door Handle Switch, and Rear Compartment Lid Release Sw. parameters while pressing their respective touch pads. The parameter should change between Active and Inactive as commanded.
• If the parameter does not cycle between the specified values, refer to Power Door Latch System Malfunction (Power Door Latch System Malfunction).
2. With the vehicle locked, attempt to passively unlock and access the vehicle at the left door, right door, and rear compartment by approaching the vehicle with a valid transmitter and pressing the touch pad. Each door and rear compartment should unlock and open.
• If both doors and the rear compartment do no unlock and open, refer to Passive Transmitter Malfunction.
• If only one door or the rear compartment do no unlock and open, refer to Antenna Circuit Malfunction.
Circuit/System Testing
Passive Transmitter Malfunction
1. Place the keyless entry transmitter on the J 43241 and approach the vehicle. Depress the touch pad. Verify the J 43241 sounds a tone.
• If the tone does not sound, replace the transmitter battery and retest with the J 43241 . If the condition continues after battery replacement, replace the keyless entry transmitter.
2. If all circuits test normal, test or replace the RCDLR.
Antenna Circuit Malfunction
1. Ignition OFF, disconnect the harness connector at the inoperative keyless entry antenna.
2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal A and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the RCDLR.
3. Install a DMM between the signal circuit terminal A and the low reference circuit terminal B. Set the DMM to capture AC voltage using the MIN MAX function.
4. Depress the touch pad. Verify the DMM captured and AC voltage signal.
• If an AC voltage was not captured, test the signal circuit and the low reference circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the RCDLR.
5. If all circuits test normal, test or replace the keyless entry antenna.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Ignition Lock Key Transmitter Antenna Replacement - Left Side (Ignition Lock Key Transmitter Antenna Replacement - Left Side)
* Ignition Lock Key Transmitter Antenna Replacement - Right Side (Ignition Lock Key Transmitter Antenna Replacement - Right Side)
* Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment (Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment)
* Control Module References (Programming and Relearning) for RCDLR replacement, setup, and programming