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Home >> Ford Truck >> 2012 >> Explorer FWD L4-2.0L Turbo >> Repair and Diagnosis >> Body and Frame >> Locks >> Power Locks >> Testing and Inspection >> Pinpoint Tests >> Handles, Locks, Latches and Entry Systems - without Intelligent Access (IA) >> Diagnostic Routine I

Diagnostic Routine I




Diagnostic Routine I

Diagnostic Overview

The Remote Keyless Entry (RKE) Transmitter Is Inoperative

Normal Operations and Fault Conditions

The RKE (Remote Keyless Entry) feature is controlled by the TPM (Tire Pressure Monitor) module and the BCM (Body Control Module). When a button is pressed on an IKT (Integrated Keyhead Transmitter) the TIC (Transmitter Identification Code) and RKE (Remote Keyless Entry) command is received by the internal TPM (Tire Pressure Monitor) module antenna. If the TPM (Tire Pressure Monitor) module determines that it is a valid and programmed TIC (Transmitter Identification Code), it sends the RKE (Remote Keyless Entry) command and TIC (Transmitter Identification Code) to the BCM (Body Control Module) over the MS-CAN (Medium Speed Controller Area Network). When the BCM (Body Control Module) receives the RKE (Remote Keyless Entry) command, it carries out the command by controlling the door locks or activating the horn and turn signals for the panic alarm.

The RKE (Remote Keyless Entry) transmitters and the BCM (Body Control 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 the BCM (Body Control Module) every time an RKE (Remote Keyless Entry) transmitter button is pressed.

DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- IKT (Integrated Keyhead Transmitter)

- Aftermarket RKE (Remote Keyless Entry) systems

Pinpoint Test

1. CHECK FOR THE CORRECT IKTs (Integrated Keyhead Transmitters)

1. Check that the correct IKTs (Integrated Keyhead Transmitters) are used with the vehicle. REFER to Integrated Keyhead Transmitter (IKT) .

Are the correct IKTs (Integrated Keyhead Transmitters) 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 IKT (Integrated Keyhead Transmitter).

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 IKT (Integrated Keyhead Transmitter).

Does the RKE (Remote Keyless Entry) feature operate?








4. PERFORM THE NETWORK TEST ON THE TPM (Tire Pressure Monitor Module)

1. Using a scan tool, perform the TPM (Tire Pressure Monitor Module) network test.

Does the TPM (Tire Pressure Monitor Module) respond to the scan tool?








5. CHECK FOR TPMS (Tire Pressure Monitoring System) DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, perform the BCM (Body Control Module) self-test.

Are any TPMS (Tire Pressure Monitoring System) DTCs (Diagnostic Trouble Codes) recorded?








6. CHECK THE RECORDED BCM (Body Control Module) DTCs (Diagnostic Trouble Codes) FROM THE SELF-TEST

1. Check the recorded results from the BCM (Body Control Module) self-test.

Is DTC (Diagnostic Trouble Code) B10AB:00 or DTC (Diagnostic Trouble Code) B1218:00 recorded?








7. RESYNCHRONIZE THE INOPERATIVE IKT (Integrated Keyhead Transmitter)

1. Ignition OFF.

2. Ignition ON.

3. Ignition OFF.

4. Press any button on the IKT (Integrated Keyhead Transmitter).

Does the RKE (Remote Keyless Entry) feature operate?








8. MAKE SURE THE RKE (Remote Keyless Entry) TRANSMITTER SIGNAL IS BEING RECEIVED

1. Ignition ON.

2. Using a scan tool, view the BCM (Body Control Module) PIDs (Parameter Identifications).

3. Press a button on the IKT (Integrated Keyhead Transmitter) while observing the BCM (Body Control Module) PIDs (Parameter Identifications) (TIC_LAST_BC and LST_RKE_xMTR).

Does the TIC (Transmitter Identification Code) and RKE (Remote Keyless Entry) command show up on the scan tool screen when a button is pressed?








9. CHECK IF THE RKE (Remote Keyless Entry) TRANSMITTERS ARE PROGRAMMED

1. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

2. Press a button on the IKT (Integrated Keyhead Transmitter) and compare the BCM (Body Control Module) PID (Parameter Identification) (TIC_LAST_BC) with the PIDs (Parameter Identifications) (TIC_01_BCM, 2, 3, 4, 7, 8, 9, or 10).

Does the TIC (Transmitter Identification Code) displayed match any of the TICs (Transmitter Identification Codes) stored in memory?








10. CHECK THE IKT (Integrated Keyhead Transmitter) BATTERY

1. Using a thin coin, open the IKT (Integrated Keyhead Transmitter).

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 IKT (Integrated Keyhead Transmitter) battery and measure the voltage.

Is the voltage greater than 2.5 volts?








11. CHECK FOR NORMAL OPERATION WITH A KNOWN GOOD IKT (Integrated Keyhead Transmitter)

1. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

2. Use the customer's second IKT (Integrated Keyhead Transmitter), or a known good RKE (Remote Keyless Entry) transmitter that is correct for the vehicle, press a button on the IKT (Integrated Keyhead Transmitter) while observing the BCM (Body Control Module) PID (Parameter Identification) (TIC_LAST_BC).

Does the TIC (Transmitter Identification Code) show up on the scan tool when a button is pressed?








12. 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?








13. 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 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 BCM (Body Control 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?







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