After replacing crankshaft position sensor engine will not start, no spark

Hi,

Since the crankshaft position sensor failed after the transmission was removed, first, confirm there are no broken wires and the connector is tight and not damaged. Also, make sure (it's easy to do) that none of the wires got pinched between the transmission and engine.

Next, we need to make sure the sensor is the problem. If you have a live data scan tool, see if there is an RPM signal when the engine is cranking. If there is a tachometer, see if it is moving when cranking. If it is, chances are the sensor isn't the issue.

If there is no signal, then we can suspect the sensor is the problem. Here are directions for testing the crankshaft position sensor. Do this and confirm it is good. Even though it is new, it still could be bad.

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1999 Nissan-Datsun Truck Pathfinder LE 4WD V6-3.3L (VG33E)
Component Inspection
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection Manufacturer Code Charts Engine Control System With MIL Indicator Lamp DTC 0802 To VIN # 350000 Component Inspection
COMPONENT INSPECTION

See pic 1

See pic 2

CRANKSHAFT POSITION SENSOR (OBD)
1. Disconnect crankshaft position sensor (OBD) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
Resistance: Approximately 166.5 - 203.5 Ohms [at 20°C (68°F)]
If NG, replace the crankshaft position sensor (OBD).

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Let me know if this helps or if you have other questions.

Take care,
Joe

That is related to the camshaft position sensor. The camshaft position sensor is a basic component of the engine control system. It monitors engine speed and piston position. These input signals to the ECM are used to control fuel injection, ignition timing and other functions.

Do me a favor, I need to know the last six digits of the vin number. There must have been a mid year change because I'm showing two different diagnostics based on VIN number.

You can find the vin on an owner's car, insurance card, or it is located at the bottom left of the windshield and mounted on the dash pad.

Let me know.

Joe

Hi,

If I sent the flow charts, you would want to hurt me. Ugh! They are extensive. Several of them require the engine to be running. So, let's try this from a different approach.

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Let's check the distributor and connections. This could lead us to the problem as well since the cam sensor, knock sensor, and so on are all tied into timing.

Here are the diagnostics. The attached pics correlate with the directions.

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1999 Nissan-Datsun Truck Pathfinder LE 4WD V6-3.3L (VG33E)
Component Inspection
Vehicle Powertrain Management Relays and Modules - Powertrain Management Relays and Modules - Ignition System Ignition Control Module Testing and Inspection Initial Inspection and Diagnostic Overview Component Inspection
COMPONENT INSPECTION

pic 1

pic 2

pic 3

pic 4

pic 5

pic 6

Component Inspection

IGNITION COIL
1. Disconnect ignition coil harness connector.
2. Check resistance as shown in the figure.

POWER TRANSISTOR
1. Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness connector.
2. Check power transistor resistance between terminals 2 and 8.
If NG, replace distributor assembly.

RESISTOR
1. Disconnect resistor harness connector.
2. Check resistance between terminals 1 and 2.
Resistance: Approximately 2.2 kohms [at 25° C (77° F)]
If NG, replace resistor.

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Make sure the wiring to the distributor hasn't been damaged as well. I can provide the diagnostics for the P0340 if you want. Let me know.

I had an after thought. There should be two ground wires on the top of the intake manifold. (Driver's side) Check to make sure they weren't damaged.

Joe