QuestionMy 98 Nissan altima also suddenly died while in traffic, it cranks but no spark. I've change the plugs, wires, distributor, and crankshaft postion sensor. I actually got it started but after a day same results all crank no start. The computer code reads camshaft position sensor. What can be the problem? Please help. I dong know where the camshaft position sensor is located ang ideas?
Answer
Altima
Hi Raul -
The CPS is located in the distributor. I am giving you a diagram, and below instructions on how to test it -
1. Remove the distributor assembly from the engine.
2. Disconnect the ignition wires and coil wire from the distributor.
The camshaft position sensor electrical harness should remain connected.
3. Turn the ignition switch ON .
4. Measure voltage between the camshaft position sensor terminals and ground, as illustrated.
5. With the engine's distributor shaft rotating slowly, voltage should fluctuate between 0 and 5 volts.
If the voltage signal is checked with the engine running, the normal reading will be 2.3 volts (average voltage). An oscilloscope may also be used to view the pulse signal.
6. If voltage does not fluctuate or is not within specification, check the circuits for damage.
7. If the circuits are functional, the sensor may be faulty.
8. Install the distributor and connect the ignition and coil wires.
9. Erase stored memory codes.
Hope this helps -
aloha
calvin
