Pinpoint Test F: DTC P2535 (Without Push Button Start)

WARNING: This page is about a different variant/trim than selected.

Refer to STARTING SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions

When the ignition is turned to the START position the PCM receives a voltage signal on the crank detect circuit. The PCM then supplies voltage and ground to the starter relay coil when the required inputs have been received.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P2535:00	Ignition Switch On/Start Position Circuit High: No Sub Type Information	This DTC sets when the PCM detects voltage on the crank detect circuit while the engine is running.

Possible Sources

BCM
Ignition switch
PCM
Wiring, terminals or connectors

F1 RETRIEVE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

Using a diagnostic scan tool, perform PCM self-tests.

Is DTC P2535 recorded?

Yes

GO to F2

No	For all PCM Diagnostic Trouble Codes (DTCs), refer to Diagnostic Trouble Code (DTC) Chart .

F2 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH PCM (POWERTRAIN CONTROL MODULE) DISCONNECTED

Ignition OFF.

Disconnect PCM C1551B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1551B-22	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes

GO to F3

GO to F5

F3 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH IGNITION SWITCH DISCONNECTED

Ignition OFF.

Disconnect Ignition switch C250 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1551B-22	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes

GO to F4

No	INSTALL a new ignition switch. REFER to: Ignition Switch - Vehicles With: Keyless Vehicle System

F4 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH BCM (BODY CONTROL MODULE) DISCONNECTED

Ignition OFF.

Disconnect BCM C2280A .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1151B-22	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to F6

F5 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Disconnect and inspect all PCM connectors.

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

Reconnect all 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 the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. Refer to POWERTRAIN CONTROL MODULE (PCM) .

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.

F6 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors.

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

Reconnect all 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 the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM REFER to: Body Control Module (BCM)

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.