Pinpoint Test D: No Power In Start - Conventional Ignition Switch

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Wiring Diagrams Power Distribution for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Steering Wheel and Column Electrical Components - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P2534:00	Ignition Switch On/Start Position Circuit Low: No Sub Type Information	This DTC sets if the PCM detects an low voltage signal from the ignition switch input circuits.
PCM P2535:00	Ignition Switch On/Start Position Circuit High: No Sub Type Information	This DTC sets if the PCM detects an high voltage signal from the ignition switch input circuits.

Possible Sources

Wiring, terminals or connectors
Ignition switch
PCM

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

D1 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) P2534 OR P2535

Ignition ON.

Using a diagnostic scan tool, carry out the BCM self-test.

Is DTC P2534 or P2535 present?

Yes	For DTC P2534, GO to D2 For DTC P2535, GO to D5

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.

D2 CHECK FOR VOLTAGE TO THE PCM (POWERTRAIN CONTROL MODULE) WITH THE IGNITION SWITCH IN THE START POSITION

Ignition OFF.

Disconnect PCM C1232B 2. 7L.

Disconnect PCM C1233B 3. 0L Diesel.

Disconnect PCM C1551B 3. 3L.

Disconnect PCM C175B 3. 5L.

Disconnect PCM C1381B 5. 0L.

Place the ignition switch in the START position.

Measure:

2. 7L

Positive Lead	Measurement / Action	Negative Lead
C1232B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 0L Diesel

Positive Lead	Measurement / Action	Negative Lead
C1233B-22	Courtesy of FORD MOTOR COMPANY	Ground

3. 3L

Positive Lead	Measurement / Action	Negative Lead
C1551B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 5L

Positive Lead	Measurement / Action	Negative Lead
C175B-43	Courtesy of FORD MOTOR COMPANY	Ground

5. 0L

Positive Lead	Measurement / Action	Negative Lead
C1381B-43	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to D5

GO to D3

D3 CHECK THE IGNITION START CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280A.

Disconnect Ignition Switch C250.

Measure:

2. 7L

Positive Lead	Measurement / Action	Negative Lead
C1232B-43	Courtesy of FORD MOTOR COMPANY	C250-1

3. 0L Diesel

Positive Lead	Measurement / Action	Negative Lead
C1233B-22	Courtesy of FORD MOTOR COMPANY	C250-1

3. 3L

Positive Lead	Measurement / Action	Negative Lead
C1551B-43	Courtesy of FORD MOTOR COMPANY	C250-1

3. 5L

Positive Lead	Measurement / Action	Negative Lead
C175B-43	Courtesy of FORD MOTOR COMPANY	C250-1

5. 0L

Positive Lead	Measurement / Action	Negative Lead
C1381B-43	Courtesy of FORD MOTOR COMPANY	C250-1

Is the resistance less than 3 ohms?

Yes

GO to D4

No	REPAIR the circuit.

D4 CHECK THE IGNITION START CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:

2. 7L

Positive Lead	Measurement / Action	Negative Lead
C1232B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 0L Diesel

Positive Lead	Measurement / Action	Negative Lead
C1233B-22	Courtesy of FORD MOTOR COMPANY	Ground

3. 3L

Positive Lead	Measurement / Action	Negative Lead
C1551B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 5L

Positive Lead	Measurement / Action	Negative Lead
C175B-43	Courtesy of FORD MOTOR COMPANY	Ground

5. 0L

Positive Lead	Measurement / Action	Negative Lead
C1381B-43	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to D5

No	REPAIR the circuit.

D5 CHECK THE IGNITION START CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON.

Measure:

2. 7L

Positive Lead	Measurement / Action	Negative Lead
C1232B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 0L Diesel

Positive Lead	Measurement / Action	Negative Lead
C1233B-22	Courtesy of FORD MOTOR COMPANY	Ground

3. 3L

Positive Lead	Measurement / Action	Negative Lead
C1551B-43	Courtesy of FORD MOTOR COMPANY	Ground

3. 5L

Positive Lead	Measurement / Action	Negative Lead
C175B-43	Courtesy of FORD MOTOR COMPANY	Ground

5. 0L

Positive Lead	Measurement / Action	Negative Lead
C1381B-43	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to D6

D6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PCM 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 PCM, BCM and ignition switch 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, Refer to PCM GUIDED ROUTINE TESTING
Internet Explorer version 11 or greater is required to perform this Pinpoint Test.

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.