Pinpoint Test D : Diagnosing Radio Frequency Interference Faults

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK FOR COMMUNICATION WITH THE GWM (GATEWAY MODULE A) AND THE RTM (RADIO TRANSCEIVER MODULE)
- Ignition ON.
- Using a diagnostic scan tool, carry out the Network Test.
Do the GWM and the RTM pass the Network Test?

Yes GO to D2

No DIAGNOSE the GWM or RTM does not respond to the scan tool. REFER to:MODULE COMMUNICATIONS NETWORK (2 OF 2) .

D2 CHECK FOR RTM (RADIO TRANSCEIVER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, carry out the RTM self-test.
Are there any Diagnostic Trouble Codes (DTCs) present in the RTM?

Yes DIAGNOSE all RTM Diagnostic Trouble Codes (DTCs). REFER to DTC Chart: RTM .

No GO to D3

D3 VIEW THE BCM (BODY CONTROL MODULE) TPMS (TIRE PRESSURE MONITORING SYSTEM) STATUS (TPMS_STATUS) PID (PARAMETER IDENTIFICATION)
- Ignition ON.
- Using a diagnostic scan tool, view the BCM TPMS_STATUS PID.
Does the TPMS_STATUS PID display SYSTEM FAULT?

Yes GO to D4

No GO to D6

D4 CARRY OUT THE TPMS (TIRE PRESSURE MONITORING SYSTEM) SENSOR TRAINING PROCEDURE

NOTE: Before beginning TPMS sensor training, make sure the vehicle is away from other vehicles or devices which may cause RFI such as electric motors or radio transmitters.

Train all 4 TPMS sensors. REFER to: Tire Pressure Monitoring System (TPMS) Sensor Location Calibration .

Did all of the TPMS sensors train and did the horn sound when each sensor was trained?

Yes	The system is operating correctly at this time. The concern may have been caused by RFI. For information on locating sources of RFI, REFER to: Tire Pressure Monitoring System (TPMS) - System Operation and Component Description .

GO to D5

D5 ATTEMPT TO CARRY OUT THE SENSOR TRAINING PROCEDURE AGAIN USING KNOWN GOOD SENSORS

Move the vehicle to rotate the wheels at least one-fourth of a turn. Leave the vehicle doors open.

Attempt to train known good TPMS sensors from another vehicle. REFER to: Tire Pressure Monitoring System (TPMS) Sensor Location Calibration .

Did all of the known good TPMS sensors train and did the horn sound when each known good sensor was trained?

Yes

If only some of the sensors trained, VERIFY the correct sensors are installed for those that fail to train. REFER to: WHEELS AND TIRES . If the correct sensors are installed and do not train, INSTALL a new TPMS sensor for each sensor that failed to train. REFER to: Tire Pressure Monitoring System (TPMS) Sensor . If all the known good sensors trained, INSTALL new TPMS sensors. REFER to: Tire Pressure Monitoring System (TPMS) Sensor .

No	INSTALL a new RTM. REFER to: Radio Transceiver Module (RTM) . If the concern is still present, GO to D6

D6 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins).
- damaged or bent pins - install new terminals or pins.
- pushed-out pins - install new pins as necessary.

Connect the BCM connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSBs) exist for this concern, BCM guided routine is not applicable for this vehicle and market. Replace the component that was faulted through service information diagnosis.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.