Electronic Key Not Detected
Electronic Key Not Detected
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 Instructionsprovides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
When a transmitter authentication is requested, the console passive antenna broadcasts a challenge within the passenger compartment to the transmitter. If the response from the transmitter via radio frequency (RF) is a valid response, the RCDLR determines there is a transmitter within the vehicle. If no response is received, the RCDLR determines that no transmitter is in the vehicle, and ELECTRONIC KEY NOT DETECTED will be displayed on the DIC.
Transmitter authentication occurs during any of the following situation:
* When the vehicle is off and the ignition control knob is pressed in.
* When the vehicle is off and the brake pedal is pressed (vehicle must be awake)
* When the vehicle is running and any door is opened and then closed.
Diagnostic Aids
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.
Conditions caused by external influences such are these are considered to be normal. Following this diagnostic will not diagnose an RF interference condition. If RF interference is suspected, question the customer about the conditions or location where the ELECTRONIC KEY NOT DETECTED condition occurs.
Reference Information
Schematic Reference
Remote Function Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector Views
Description and Operation
Keyless Entry System Description and Operation (with ATH) Keyless Entry System (with ATH)Keyless Entry System Description and Operation (without ATH) Keyless Entry System (without ATH)
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 Control Module Referencesfor scan tool information
Circuit/System Verification
Note: This condition may be caused by low vehicle battery voltage. If the battery is not sufficiently charged (above 10 volts), the system will have difficulties detecting the fob and the ELECTRONIC KEY NOT DETECTED message will be displayed. Correct the low battery voltage condition to eliminate this condition.
1. Verify DTC B3119, B3120, B3121, B3122, or B3123 is not set.
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. With the vehicle locked, attempt to passively unlock and enter the vehicle by approaching the vehicle with a valid transmitter and pulling the exterior door handle. The door should unlock and open.
• If unable to enter the vehicle passively, refer to Keyless Entry System Malfunction (Active) Keyless Entry System Malfunction (Active)Keyless Entry System Malfunction (Passive) Keyless Entry System Malfunction (Passive).
3. Place the transmitter in the console active antenna pocket and attempt to start the vehicle. The vehicle should start.
• If the vehicle does not start, perform the Remote Control Door Lock and Theft Deterrent Transmitter Programming (with ATH - Canada and Europe) Remote Control Door Lock and Theft Deterrent Transmitter Programming (with ATH - Canada and Europe)Remote Control Door Lock and Theft Deterrent Transmitter Programming (with ATH - N America and Asia) Remote Control Door Lock and Theft Deterrent Transmitter Programming (with ATH - N America and Asia) procedure.
4. While placing the keyless entry transmitter in various locations within the vehicle interior, attempt to start the vehicle. The ELECTRONIC KEY NOT DETECTED message should be displayed on the DIC.
• If the message is not displayed, inspect for any sources of RF interference such as cell phone chargers, power supplies, etc. that would interrupt transmitter and antenna communication. If inspect does not reveal any items causing RF interference, contact the customer and question the customer about the conditions or location where the ELECTRONIC KEY NOT DETECTED condition occurs. Discuss any devices that are normally kept in the vehicle, such as a laptop or cell phone charger, which may have been removed when the vehicle was brought in for service. It may be necessary to explain to the customer how RF interference degrades the performance of the system.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the console passive antenna.
2. 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.
3. Attempt to start the vehicle. Verify the DMM captured an 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.
4. If all circuits test normal, test or replace the console passive antenna.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Passive) Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Passive)Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Active) Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Active)
* Control Module References Control Module Referencesfor RCDLR replacement, setup, and programming