Pinpoint Test C : No Power In On - Conventional Ignition Switch

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 damage the connector.

C1 CARRY OUT A NETWORK TEST
- Ignition ON.
- Using a diagnostic scan tool, carry out the network test.
Does the BCM and the IPC pass the network test?

Yes GO to C2

No REFER to: MODULE COMMUNICATIONS NETWORK (1 OF 2) or MODULE COMMUNICATIONS NETWORK (2 OF 2) .

C2 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) U300A:01
- Using a diagnostic scan tool, carry out the BCM self-test.
Is DTC U300A:01 present?

Yes GO to Pinpoint Test K

No GO to C3

C3 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) B1310:12 OR B1310:14
- Using a diagnostic scan tool, carry out the BCM self-test.
Is DTC B1310:12 or B1310:14 present?

Yes GO to C7

No GO to C4

C4 CHECK FOR VOLTAGE TO THE BCM (BODY CONTROL MODULE) WITH THE IGNITION SWITCH IN THE ON POSITION

Ignition OFF.

Disconnect BCM C2280B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-37	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to C7

No	VERIFY BCM fuse 18 (5A) is OK. If OK, GO to C5 If not OK, Refer to the Wiring Diagram Information to identify the possible cause of the circuit short.

C5 CHECK THE IGNITION ON-DESIGNATED INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect Ignition Switch C250 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-37	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	REPAIR the circuit.

GO to C6

C6 CHECK THE IGNITION ON-DESIGNATED INPUT CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Ignition Switch C250 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-37	Courtesy of FORD MOTOR COMPANY	C250-1

Is the resistance less than 3 ohms?

Yes	INSTALL a new ignition switch. REFER to:Ignition Switch .

No	REPAIR the circuit.

C7 CARRY OUT A NETWORK TEST

Using a diagnostic scan tool, perform the network test.

Do the IPC and the BCM pass the network test?

Yes

GO to C8

No	DIAGNOSE an intermittent network concern. REFER to:MODULE COMMUNICATIONS NETWORK (1 OF 2) or MODULE COMMUNICATIONS NETWORK (2 OF 2) .

C8 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect BJB C1035C .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1035C-8	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to C9

GO to C10

C9 ISOLATE THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT SHORT TO VOLTAGE

Disconnect BCM C2280F .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280F-25	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	REPAIR the circuit.

No	INSTALL a new BJB.

C10 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL CONTROL CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280F .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280F-25	Courtesy of FORD MOTOR COMPANY	C1035C-8

Is the resistance less than 3 ohms?

Yes

GO to C11

No	REPAIR the circuit.

C11 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280F-25	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to C12

No	REPAIR the circuit.

C12 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors.

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

Reconnect the BCM connectors and all other previously disconnected 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 service articles address 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.