Pinpoint Test I : U1A00:00

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.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

I1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, carry out the Network Test.
Do the RTM and the BCM pass the Network Test?

Yes GO to I2

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

I2 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, carry out the BCM self-test.
Are any Diagnostic Trouble Codes (DTCs) present in the BCM?

Yes DIAGNOSE the Diagnostic Trouble Codes (DTCs). REFER to:MULTIFUNCTION ELECTRONIC MODULES .

No GO to I6

I3 CHECK THE RTM (RADIO TRANSCEIVER MODULE) BATTERY VOLTAGE INPUT FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280C .

Disconnect RTM C9026 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-22	Courtesy of FORD MOTOR COMPANY	C9026-6

Is the resistance less than 3 ohms?

Yes

GO to I4

No	REPAIR the circuit.

I4 CHECK THE RTM (RADIO TRANSCEIVER MODULE) BATTERY VOLTAGE INPUT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C9026-6	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to I5

No	REPAIR the circuit. VERIFY BCM fuse 14 (10A) is OK. INSTALL a new fuse as necessary.

I5 CHECK THE RTM (RADIO TRANSCEIVER MODULE) GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C9026-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to I6

No	REPAIR the circuit.

I6 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

Disconnect BCM C2280B .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-26	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to I7

No	REPAIR the circuit.

I7 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-26	Courtesy of FORD MOTOR COMPANY	C9026-2

Is the resistance less than 3 ohms?

Yes

GO to I8

No	REPAIR the circuit.

I8 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

Connect BCM C2280B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C9026-2	Courtesy of FORD MOTOR COMPANY	Ground

Is a steady voltage greater than 3 volts present?

Yes	REPAIR the circuit.

GO to I9

I9 CHECK FOR CORRECT RTM (RADIO TRANSCEIVER MODULE) OPERATION

Ignition OFF.

Inspect the RTM electrical connector.

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

Connect RTM C9026 , make sure the connector seats and latches correctly.

Connect all previously disconnected BCM electrical connectors, make sure the connectors 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) address this concern, INSTALL a new RTM. REFER to:Radio Transceiver Module (RTM) .

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