3. Detect Malfunctioning Part

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Check the following.

Harness connectors M135, F105
Harness connectors E315, F5
Harness for open or short between crankshaft position sensor (POS) and ECM
Harness for open or short between crankshaft position sensor (POS) and ECM relay
1. : Repair open circuit or short to ground or short to power in harness or connectors.