Pinpoint Test A : No Power In On

WARNING: This page is about a different car, the 2018 Lincoln MKC. 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.

A1 CHECK VEHICLE BATTERY

Carry out the Battery Condition Test. REFER to: Battery .

Is the battery OK?

Yes	If DTC B108A:01, B108A:24, B108A:9E or B1142:29 is present, GO to A4, Otherwise, GO to A2

No	CORRECT the battery condition and VERIFY correct charging operation. REFER to: Charging System - System Operation and Component Description .

A2 CHECK FOR IGNITION ON MODE

Press and release the START/STOP button while monitoring the ignition mode indicator at the top of the button.

Does the ignition mode indicator flash on and off continuously?

Yes	VERIFY the BJB fuse 7 (125A) is OK. If OK, GO to A19 If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

GO to A3

A3 CHECK FOR A PATS (PASSIVE ANTI-THEFT SYSTEM) CONCERN
- Press the START/STOP button while monitoring the message center.
Does No key detected display in the message center?

Yes REFER to: Passive Anti-Theft System (PATS) .

No GO to A4

A4 CHECK THE IGNITION SWITCH 1 (START_STOP_1) PID (PARAMETER IDENTIFICATION)
- Using a diagnostic scan tool, view the BCM Parameter Identification (PIDs).
- Monitor the BCM PID START_STOP_1 while pressing and releasing the START/STOP button.
Does the PID change state when the START/STOP button is pressed and released?

Yes GO to A12

No GO to A5

A5 CHECK THE START/STOP 1 INPUT CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect BCM C2280G .

Disconnect GSM C2503 .

Disconnect PCM C175B or C1381B .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-12	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to A6

A6 CHECK THE START/STOP 1 INPUT CIRCUIT FOR A SHORT TO THE START/STOP 2 INPUT CIRCUIT

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-12	Courtesy of FORD MOTOR COMPANY	C2503-14

Is the resistance greater than 10, 000 ohms?

Yes

GO to A7

No	REPAIR the circuit.

A7 CHECK THE START/STOP 1 INPUT CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to A8

No	REPAIR the circuit.

A8 BYPASS THE GSM (GEARSHIFT MODULE) WHILE MONITORING THE IGNITION SWITCH 1 (START_STOP_1) PID (PARAMETER IDENTIFICATION)

Connect BCM C2280G .

Using a diagnostic scan tool, view the BCM Parameter Identification (PIDs).

Monitor the BCM PID START_STOP_1.

Momentarily connect:

Positive Lead	Measurement / Action	Negative Lead
C2503-18	Courtesy of FORD MOTOR COMPANY	C2503-12

Does the PID indicate the START/STOP button is pressed with the jumper wire connected?

Yes

GO to A27

GO to A9

A9 CHECK FOR VOLTAGE TO THE IGNITION SWITCH

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-18	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to A11

No	VERIFY BCM fuse 12 (7.5A) is OK. If OK, GO to A10 If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible cause of the circuit short.

A10 CHECK THE IGNITION SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect BCM C2280H .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-18	Courtesy of FORD MOTOR COMPANY	C2280H-10

Is the resistance less than 3 ohms?

Yes

GO to A28

No	REPAIR the circuit.

A11 CHECK THE BCM (BODY CONTROL MODULE) START/STOP 1 INPUT CIRCUIT FOR AN OPEN

Disconnect BCM C2280G .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-12	Courtesy of FORD MOTOR COMPANY	C2280G-51

Is the resistance less than 3 ohms?

Yes

GO to A28

No	REPAIR the circuit.

A12 CHECK THE IGNITION SWITCH 2 (START_STOP_2) PID (PARAMETER IDENTIFICATION)
- Using a diagnostic scan tool, view the BCM Parameter Identification (PIDs).
- Monitor the BCM PID START_STOP_2 while pressing the START/STOP button.
Does the PID change state when the START/STOP button is pressed and released?

Yes GO to A28

No GO to A13

A13 CHECK THE BCM (BODY CONTROL MODULE) START/STOP 2 INPUT CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect GSM C2503 .

Disconnect BCM C2280G .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-14	Courtesy of FORD MOTOR COMPANY	Ground

Is there any voltage present?

Yes	REPAIR the circuit.

GO to A14

A14 CHECK THE START/STOP 1 INPUT CIRCUIT FOR A SHORT TO THE START/STOP 2 INPUT CIRCUIT

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-12	Courtesy of FORD MOTOR COMPANY	C2503-14

Is the resistance greater than 10, 000 ohms?

Yes

GO to A15

No	REPAIR the circuit.

A15 CHECK THE BCM (BODY CONTROL MODULE) START/STOP 2 INPUT CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-14	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to A16

No	REPAIR the circuit.

A16 BYPASS THE GSM (GEARSHIFT MODULE) WHILE MONITORING THE IGNITION SWITCH 2 (START_STOP_2) PID (PARAMETER IDENTIFICATION)

Connect BCM C2280G .

Using a diagnostic scan tool, view the BCM Parameter Identification (PIDs).

Monitor the BCM PID START_STOP_2.

Momentarily connect:

Positive Lead	Measurement / Action	Negative Lead
C2503-14	Courtesy of FORD MOTOR COMPANY	Ground

Does the PID indicate the START/STOP button is pressed with the jumper wire connected?

Yes

GO to A17

GO to A18

A17 CHECK THE IGNITION SWITCH GROUND CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-18	Courtesy of FORD MOTOR COMPANY	C2503-1
C2503-18	Courtesy of FORD MOTOR COMPANY	C2503-10

Are the voltages greater than 11 volts?

Yes

GO to A27

No	REPAIR the ignition switch ground circuit in question.

A18 CHECK THE BCM (BODY CONTROL MODULE) START/STOP 2 INPUT CIRCUIT FOR AN OPEN

Disconnect BCM C2280G .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2503-14	Courtesy of FORD MOTOR COMPANY	C2280G-5

Is the resistance less than 3 ohms?

Yes

GO to A28

No	REPAIR the circuit.

A19 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	VERIFY the BCM fuse 34 (30A) is OK. If OK, GO to A20 If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

No	REFER to: Communications Network .

A20 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY
- Ignition OFF.
- Disconnect BJB Run/Start Relay.
- Substitute a known good relay.
- Ignition ON.
- Using a diagnostic scan tool, perform the BCM self-test.
Do the systems in question now operate?

Yes REMOVE the known good relay. INSTALL a new BJB run/start relay.

No REMOVE the known good relay. GO to A21

A21 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY BJB run/start relay, cavity 1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to A22

No	VERIFY the BJB fuse 23 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

A22 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY BATTERY VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY BJB run/start relay, cavity 3	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to A23

No	VERIFY the BJB fuse 11 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

A23 CHECK THE BJB (BATTERY JUNCTION BOX) RUN/START RELAY OUTPUT CIRCUIT FOR AN OPEN

Connect:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY BJB run/start relay, cavity 3	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY BJB run/start relay, cavity 5

Do the systems in question now operate?

Yes	REMOVE the fused jumper wire. GO to A24

No	REMOVE the fused jumper wire. REPAIR the run/start relay output circuit for an open.

A24 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect BCM C2280C .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-25	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to A25

A25 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-25	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to A26

No	REPAIR the circuit.

A26 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-25	Courtesy of FORD MOTOR COMPANY	BJB run/start relay, cavity 2

Is the resistance less than 3 ohms?

Yes	INSTALL the BJB Run/Start Relay. GO to A28

No	REPAIR the circuit.

A27 CHECK FOR CORRECT GSM (GEARSHIFT MODULE) OPERATION

Disconnect and inspect the GSM 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 GSM connector 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GSM. REFER to: Gearshift Module (GSM) .

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.

A28 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to: BCM Hardware Testing -- MKC .

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.