Front Side Door Access Control Transmitter Malfunction

Circuit/System Description The Front Side Door Access Control Transmitter is an accessory offered to be used as a vehicle entry device. Similar to the Keyless Entry Transmitter, the Front Side Door Access Control Transmitter will send a radio frequency signal to the Remote Function Actuator. Next, the Remote Function Actuator sends a signal to the Body Control Module via LIN communication. The BCM will interpret this signal and either lock or unlock the vehicle as a result. A low transmitter battery or radio frequency interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High radio frequency traffic areas, such as gas stations that use pay-at-the-pump radio frequency transponders, may also cause interference that could lead to a malfunction. Reference Information Schematic Reference Remote Function Schematics Connector End View Reference Master Electrical Component List Description and Operation Keyless Entry System Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Special Tools EL-52545 Tire Pressure Monitor Sensor and RF Diagnostic Tool Circuit/System Verification In order to determine the best starting point to begin diagnosis first determine which features on the vehicle are functioning correctly or not. By performing a simple and quick check on the vehicle it can be determined if there is or isn’t a fault in each feature. If any one part of the feature is faulty then the feature status is failed. Match the status of all four features and go the suggested link to begin diagnosis.

Note

The Front Side Door Access Control Transmitter will need to be reprogrammed in the event of BCM replacement. This can only be achieved with the Master Code. If the Master Code is not retrievable, a new Front Side Door Access Control Transmitter with accompanying wallet card will need to be programmed to the new BCM. Active Keyless Entry Verification

1. Ignition off, stand approximately 10 meters (33 feet) from the vehicle.
2. Verify that no other DTCs are set, as they could be the root cause of the issue. ⇒ If any of the DTCs are set Refer to Diagnostic Trouble Code (DTC) List - Vehicle. ⇓ If none of the DTCs are set
3. Verify the keyless entry transmitter locks and unlocks the vehicle. ⇒ If the vehicle either does not lock or does not unlock Refer to Keyless Entry System Malfunction. ⇓ If the vehicle locks and unlocks
4. Verify the Front Side Door Access Control Transmitter locks and unlocks the vehicle. ⇓ If the vehicle either does not lock or does not unlock Refer to circuit system testing below. ⇓ If the vehicle locks and unlocks
5. All OK.

Keyless Entry Transmitter Status	Front Side Door Access Control Transmitter Status	Most Probable Diagnostic Starting Point
Passed	Passed	—
Passed	Failed	Front Side Door Access Control Transmitter
Failed	Passed	Keyless Entry Transmitter
Failed	Failed	Remote Function Actuator
Problem	Possible Cause	Solution
Keypad not programming via TIS2WEB	Wrong keypad part number is being used/installed	Verify correct part number
Keypad not programming via TIS2WEB	Decoded QR code (.csv file) received from TCSC not placed in ‘USERS’ file on technician computer	Place .csv file in USERS file per installation instructions. If placed correctly, TIS2WEB should initiate 10-minute program countdown when file is selected
When prompted by TIS2WEB that the keypad programming was Successful (post 10- minute program countdown), vehicle doors will not unlock with Master code	Wrong Master code entered Master code was entered too slowly	Confirm Master code on User/Wallet card (see sample user/wallet card below) included with every keypad kit Each Master code digit must be entered within 5 seconds of each other

Prompted by TIS2WEB that the keypad programming was Unsuccessful (post 10-minute program countdown)	Programming was unsuccessful	Repeat programming procedures via TIS2WEB
Kit does not contain User/Wallet card – QR code and Master code are unknown	User/Wallet card may be tucked in other paperwork contained in the kit	If original User/Wallet card cannot be located (see sample user/wallet card below) - QR code and Master code are NOT retrievable and keypad will need to be replaced with a new kit
Vehicle doors will not unlock with Master code or Personal code	Battery may be low or “bad” One or more keypad buttons may not be functioning/transmitting Wrong Master code or Personal code was entered	Test keypad battery by locking vehicle doors – Simultaneously press the 7/8 and 9/0 buttons – if the battery is “good”, the vehicle doors will lock Press each keypad button and confirm the keypad LED or number backlighting illuminates with each button press Retrieve Master code from original user/wallet card (see sample user/wallet card below)
Master code and/or Personal code are unknown	User/Wallet card may be tucked in vehicle glove box, center console or vehicle owner’s manual	If original User/Wallet card cannot be located (see sample user/wallet card below) or Master code is NOT retrievable - Keypad will need to be replaced with a new kit
Master code and/or Personal code are entered and driver’s door unlocks, locks and unlocks again	LOW POWER WARNING – Keypad battery life (3 uses/day for 10 years) has exceeded lifetime expectancy	Keypad is weather-sealed for quality assurance and the battery cannot be replaced – Keypad will need to be replaced with a new kit
Vehicle doors will not unlock with the Personal code	Wrong Personal code was entered, Personal code was lost or entered incorrectly when initially programmed	If Personal code is unknown, Master code on user/wallet card will ALWAYS operate the keypad and can be used to program a new Personal code

Circuit/System Testing

1. Ignition ON.
2. Using the master code, verify the Front Side Door Access Control Transmitter is functioning by unlocking the vehicle. ⇒ If the Front Side Door Access Control Transmitter LED light does not illuminate and the vehicle does not unlock Replace the Front Side Door Access Control Transmitter. ⇓ If the Front Side Door Access Control Transmitter LED light does illuminate and the vehicle does not unlock
3. Verify the Front Side Door Access Control Transmitter is the correct part number and frequency for the vehicle. ⇒ If the part number or frequency is incorrect for the vehicle Replace the Front Side Door Access Control Transmitter. ⇒ If the part number and frequency are both correct
4. Use the EL-52545 to verify the Front Side Door Access Control Transmitter is emitting a signal strength of 20% or greater. ⇒ If the Front Side Door Access Control Transmitter does not emit a signal of 20% or greater Replace the Front Side Door Access Control Transmitter. ⇓ If the Front Side Door Access Control Transmitter does emit a signal of 20% or greater
5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair.

Note

Installation procedures can be found in the Accessory Installation Manual in the Electrical Accessories section.