• | 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Console --Keyless Entry Active Antenna Signal | B3122 02 | B3122 05 | B3122 05 | -- |
Console --Keyless Entry Active Antenna Low Reference | -- | B3122 05 | -- | -- |
The console active antenna is located in the center console and is used to establish low frequency communications with the keyless entry transmitter The keyless entry console active antenna is only used when the console passive antenna was unable to locate a transmitter within the interior of the vehicle. This may be due to a keyless entry transmitter battery being low or radio/low frequency interference.
When a valid transmitter is placed into the pocket located in the center console, and either the brake pedal is depressed or the ignition switch is pressed, the console active antenna broadcasts a challenge to the transmitter. This causes a low frequency coupling to occur between the transmitter and the console active antenna. If the response from the transmitter is a valid response, and all of the security requirements are met, the vehicle's engine will start, or be allowed to go into accessory mode.
The console active antenna is activated
The keyless entry control module detects a short to ground on the console keyless entry active antenna circuit.
The keyless entry control module detects a short to B+ or an open on the console keyless entry active antenna circuit.
The vehicle will not start or go into accessory mode.
• | A current DTC will clear when the conditions for setting the DTC are no longer present |
• | A history DTC will clear after 50 malfunction free ignition cycles |
Keyless Entry System Description and Operation
Control Module References for scan tool information
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the keyless entry control module. |
⇒ | If not the specified value, test the B+ voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the keyless entry control module. |
• | Terminal B |
• | Terminal C |
⇒ | If the test lamp illuminates, test the signal circuit for a short to voltage. |
• | Terminal B |
• | Terminal C |
⇒ | If less than the specified value, test the signal circuit for a short to ground. |
• | Terminal B at the keyless entry control module and terminal 3 at the console active antenna |
• | Terminal C at the keyless entry control module and terminal 4 at the console active antenna |
⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.