Engine Start-Up (Cranking)

1995 Chrysler New Yorker V6-3.5L VIN FSECTION Engine Start-Up (Cranking)


This is an OPEN LOOP mode.

When the starter motor is engaged, the PCM receives input from:


- Battery voltage

- Crankshaft position (CKP) sensor

- Engine coolant temperature (ECT) sensor

- Intake air temperature (IAT) sensor

- Throttle position sensor (TPS)

- Camshaft position (CMP) sensor

- Starter relay

Based on these inputs the PCM will:

- Monitor crankshaft and camshaft position sensor. If signals are not received within 1 second, the PCM will shut down the ASD and fuel pump relays.

- Supply the injectors with a ground path, firing all injectors until the PCM determines crankshaft position.

- Fire injectors in sequence, once PCM has determined crankshaft position.

- Compare 0 RPM MAP sensor reading to idle speed MAP sensor reading. If the PCM does not detect a minimum difference it will set a Diagnostic Trouble Code.

- Determine proper ignition timing.




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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.