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 the PCM 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) - 3.7L Duratec (227kW/301PS. |
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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. |
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DIAGNOSIS AND TESTING > STARTING SYSTEM > PINPOINT TEST(S) > PINPOINT
TEST D : P2535
Refer to Electronic Engine Controls - 3.7L for schematic and connector information.
Normal Operation and Fault Conditions
When the ignition switch - push button start has been pressed, the PCM receives a voltage signal on the crank detect circuit. When the required inputs have been received, the PCM supplies voltage and ground to the starter relay coil. The ignition switch - push button start is part of the FCIM and cannot be serviced separately. For more information, REFER to: Starting System - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
P2535 | Ignition Switch Run/Start Position Circuit High | The PCM sets this DTC when the PCM detects voltage on the crank detect circuit while engine is running. |
Possible Sources
Ignition switch - push button start
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.