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
The RKE (Remote Keyless Entry) transmitter in the IA (Intelligent Access) key sends a radio signal to the TPM (Tire Pressure Monitor) module based on the user selected RKE (Remote Keyless Entry) transmitter button. The TPM (Tire Pressure Monitor) module then communicates the command to the RFA (Remote Function Actuator) module, and the RFA (Remote Function Actuator) module carries out the selected action. The IA (Intelligent Access) keys and the RFA (Remote Function Actuator) module also utilize 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 IA (Intelligent Access) key button is pressed.
The TPM (Tire Pressure Monitor) module receives voltage at all times and has a dedicated ground circuit. The TPM (Tire Pressure Monitor) module sends TPMS (Tire Pressure Monitoring System) information over the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module). The TPM (Tire Pressure Monitor) module sends all RKE (Remote Keyless Entry) and IA (Intelligent Access) key information and requests to the RFA (Remote Function Actuator) module through a dedicated single circuit network.
DTC Fault Trigger Conditions
Visual Inspection and Diagnostic Pre-checks
- IA (Intelligent Access) key
Pinpoint Test
1. CHECK FOR THE CORRECT IA (Intelligent Access) KEYS
1. Check that 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 RKE (Remote Keyless Entry) OPERATION WHEN THE TPM (Tire Pressure Monitor) MODULE IS IN AN AWAKE MODE
1. Open and close the driver door.
2. Press any button on the IA (Intelligent Access) key.
Does the RKE (Remote Keyless Entry) feature operate?
3. CHECK THE RKE (Remote Keyless Entry) OPERATION WHEN THE TPM (Tire Pressure Monitor) MODULE IS IN A SLEEP MODE
1. Ignition OFF.
2. Let the vehicle to sit for 10 minutes to allow the vehicle modules to go into a sleep mode.
3. Press any button on the IA (Intelligent Access) key.
Does the RKE (Remote Keyless Entry) feature operate?
4. CHECK THE RFA (Remote Function Actuator) MODULE DTCs (Diagnostic Trouble Codes) FROM THE SELF-TEST
1. Using a scan tool, perform 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. Press any button on the inoperative IA (Intelligent Access) key 4 times consecutively within 30 seconds.
Does the IA (Intelligent Access) key operate correctly now?
6. CHECK FOR A SECOND IA (Intelligent Access) KEY
1. Check for another IA (Intelligent Access) key that operates with the vehicle.
Is there another IA (Intelligent Access) key that operates with the vehicle?
7. 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 a 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?
8. CHECK THE IA (Intelligent Access) KEY
1. Place the IA (Intelligent Access) key in the backup pocket.
2. Start the engine.
Does the engine start?
9. CHECK THE IA (Intelligent Access) KEY BATTERY
1. Using a thin coin, 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?
10. CHECK FOR COMMUNICATION WITH THE TPM (Tire Pressure Monitor) MODULE
1. Using a scan tool, perform the network test.
Does the TPM (Tire Pressure Monitor) module pass the network test?
11. CHECK THE TPM (Tire Pressure Monitor) MODULE COMMUNICATION CIRCUIT FOR A SHORT TO VOLTAGE
NOTE: Place the IA (Intelligent Access) key in the backup slot for this pinpoint test.
1. Ignition OFF.
2. Disconnect: TPM (Tire Pressure Monitor) Module.
3. Disconnect: RFA (Remote Function Actuator) Module C2153E.
4. Ignition ON.
5. Measure:
Is any voltage present?
12. CHECK THE TPM (Tire Pressure Monitor) MODULE COMMUNICATION CIRCUIT FOR AN OPEN OR SHORT TO GROUND
1. Ignition OFF.
2. Measure:
3. Measure:
Is the resistance less than 3 ohms between the TPM (Tire Pressure Monitor) module and the RFA (Remote Function Actuator) module; and greater than 10,000 ohms between the TPM (Tire Pressure Monitor) module and ground?
13. CHECK FOR CORRECT TPM (Tire Pressure Monitor) MODULE OPERATION
1. Ignition OFF.
2. Disconnect and inspect the TPM (Tire Pressure Monitor) module connector.
3. Repair:
- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary
4. Reconnect the TPM (Tire Pressure Monitor) module connector. Make sure it seats and latches correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
14. 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 connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary
4. Reconnect all RFA (Remote Function Actuator) module connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
