Diagnostic Routine J
Diagnostic Routine J
Diagnostic Overview
The Remote Keyless Entry (RKE) Transmitter Is Inoperative
Refer to Wiring Diagram Set 117 for schematic and connector information Electrical Diagrams.
Normal Operations and Fault Conditions
REFER to Remote Keyless Entry (RKE) .
The RKE (Remote Keyless Entry) transmitters and RFA (Remote Function Actuator) module use a rolling code to prevent the code from being captured by a code grabber. The system advances the counter in the RKE (Remote Keyless Entry) transmitter and RFA (Remote Function Actuator) module every time an RKE (Remote Keyless Entry) transmitter button is pressed.
If the vehicle has been inactive for 28 days or longer, the RKE (Remote Keyless Entry) feature is switched off to conserve battery power. The RKE (Remote Keyless Entry) feature is enabled again when the ignition is switched to RUN.
DTC Fault Trigger Conditions
Visual Inspection and Diagnostic Pre-checks
- IA (Intelligent Access) key
Pinpoint Test
1. CHECK FOR THE CORRECT IA (Intelligent Access) KEY
1. Verify the correct IA (Intelligent Access) keys are used with the vehicle. REFER to Intelligent Access (IA) Key .
Are all the correct IA (Intelligent Access) keys present?
2. CHECK THE FUNCTIONALITY OF THE RKE (Remote Keyless Entry) TRANSMITTER
1. Press each button on the IA (Intelligent Access) key.
Does any button operate correctly?
3. CHECK FOR COMMUNICATION WITH THE BCM (Body Control Module) AND RFA (Remote Function Actuator) MODULE
1. Using a scan tool, perform a network test.
Does the BCM (Body Control Module) and RFA (Remote Function Actuator) module pass the network test?
4. CHECK THE RFA (Remote Function Actuator) MODULE DTCs (Diagnostic Trouble Codes) FROM THE SELF-TEST
1. Using a scan tool, perform a RFA (Remote Function Actuator) module self-test.
Are any DTCs (Diagnostic Trouble Codes) recorded?
5. RESYNCHRONIZE THE INOPERATIVE IA (Intelligent Access) KEY
1. Ignition OFF.
2. Within 30 seconds, press any button on the inoperative IA (Intelligent Access) key 4 times consecutively.
Does the IA (Intelligent Access) key operate correctly now?
6. RESYNCHRONIZE THE INOPERATIVE IA (Intelligent Access) KEY USING THE SECOND IA (Intelligent Access) KEY
1. Ignition OFF.
2. Press any button on the operational IA (Intelligent Access) key.
3. Within 30 seconds, press any button on the inoperative IA (Intelligent Access) key.
4. Check the inoperative IA (Intelligent Access) key for correct operation.
Does the inoperative IA (Intelligent Access) key operate now?
7. CHECK THE IA (Intelligent Access) KEY
1. Place the IA (Intelligent Access) key in the backup slot.
2. Start the engine.
Does the engine start?
8. CHECK THE IA (Intelligent Access) KEY BATTERY
1. Open the IA (Intelligent Access) key.
2. Do not clean off any grease from the battery terminals on the back surface of the circuit board.
3. Verify the correct battery is used (CR2032).
4. Remove the IA (Intelligent Access) key battery and measure the voltage.
Is the voltage greater than 2.5 volts?
9. CHECK FOR NORMAL OPERATION WITH A KNOWN GOOD IA (Intelligent Access) KEY
1. Using a known good or the customer's second IA (Intelligent Access) key, press a button on the IA (Intelligent Access) key.
Is the concern still present?
10. CHECK FOR VOLTAGE TO THE RFR (Remote Functions Receiver) MODULE
1. Ignition OFF.
2. Disconnect: RFR (Remote Functions Receiver) Module.
3. Measure:
Is the voltage greater than 11 volts?
11. CHECK THE RFR (Remote Functions Receiver) MODULE VOLTAGE SUPPLY CIRCUIT
1. Measure:
Is the voltage greater than 11 volts?
12. CHECK THE RFR (Remote Functions Receiver) MODULE COMMUNICATION CIRCUIT FOR A SHORT TO VOLTAGE
1. Disconnect: RFA (Remote Function Actuator) Module C4392D.
2. Disconnect: Ignition relay.
3. Connect a fused jumper wire:
4. Measure:
Is any voltage present?
13. ISOLATE THE SHORT TO VOLTAGE
1. Disconnect: BCM (Body Control Module) C2280B.
2. Measure:
Is any voltage present?
14. ISOLATE THE BCM (Body Control Module) FOR THE SHORT TO VOLTAGE
1. Disconnect: BCM (Body Control Module) C2280H.
2. Measure:
Is any voltage present?
15. CHECK THE RFR (Remote Functions Receiver) MODULE COMMUNICATION CIRCUIT FOR A SHORT TO GROUND
1. Measure:
Is the resistance greater than 10,000 ohms?
16. ISOLATE THE SHORT TO GROUND
1. Disconnect: BCM (Body Control Module) C2280B.
2. Measure:
Is the resistance greater than 10,000 ohms?
17. ISOLATE THE BCM (Body Control Module) FOR THE SHORT TO GROUND
1. Disconnect: BCM (Body Control Module) C2280H.
2. Measure:
Is the resistance greater than 10,000 ohms?
18. CHECK THE RFR (Remote Functions Receiver) MODULE COMMUNICATION CIRCUIT FOR AN OPEN
1. Measure:
Is the resistance less than 3 ohms?
19. ISOLATE THE OPEN CIRCUIT
1. Disconnect: BCM (Body Control Module) C2280H.
2. Measure:
Is the resistance less than 3 ohms?
20. ISOLATE THE OPEN CIRCUIT
1. Disconnect: BCM (Body Control Module) C2280B.
2. Measure:
Is the resistance less than 3 ohms?
21. CHECK FOR CORRECT BCM (Body Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all BCM (Body Control Module) connectors.
3. Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals pins
- pushed-out pins - install new pins as necessary
4. Reconnect all the BCM (Body Control Module) connectors and make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
22. CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
1. Ignition OFF.
2. Disconnect and inspect all RFA (Remote Function Actuator) module connectors.
3. Repair:
- corrosion (install new connectors or terminals- clean module pins)
- damaged or bent pins- install new terminals pins
- pushed-out pins- install new pins as necessary
4. Reconnect all the RFA (Remote Function Actuator) module connectors and make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
