Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Saturn SC2 L4-1.9L DOHC VIN 7FACTORY OEM SERVICE PROCEDURE
Chart 4
Diagnostic Chart:
Wiring Diagram:
In order to control spark and fuel the PCM must receive pulses from the crankshaft position sensor. The Scan tool should always display rpm whenever the engine is running or cranking above 60 rpm. This chart will isolate the cause of crank pulses not being received by the PCM.
DIAGNOSTIC AIDS
An intermittent in the crankshaft position sensor circuit may cause DTC P1599 engine stall DTC to set.
TEST DESCRIPTION
The correct resistance of the crankshaft position sensor does not indicate the sensor is OK. The output voltage of the sensor must also be checked. If resistance is greater than 900 ohms check for high resistance, corrosion or open circuits. If resistance is less than 700 ohms check for short to ground or for 573 and 574 circuits shorted together.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.