Question about 1997 Pontiac Grand Am

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Where would i find the crank sensor in a 2.4l twin cam motor

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The crank sensor is usually located near the crankshaft of the engine, not on the transmission with wires leading to it.

TESTING Fig. 1: Attach suitable jumper wires between the CKP sensor and CKP sensor harness. A DC volt meter can then be attached to the necessary terminals to test the sensor as the engine is being cranked where would i find the crank sensor in a 2.4l twin - 91114p21.jpg
Typically, when a crankshaft position sensor DTC is set, checking the integrity of the wiring connecting the sensor (using a digital volt meter) to the PCM harness connector is the best way to determine if the sensor is faulty. If the wires all have continuity, and a DTC is set, it is probable that the sensor is faulty. Although a procedure is given here for testing of the crankshaft sensor itself, it is generic, and may not apply to every vehicle. Typically, the crankshaft position sensor harness connector wire leads are labeled. However, it is advisable to use this procedure in conjunction with the wiring diagrams in Section 6 to identify the terminals on the crankshaft sensor before connecting test leads.

  1. Turn the ignition key OFF.
  2. Unplug the sensor electrical harness and check the terminals for corrosion and damage.
  3. Check the sensor wiring harness wires for continuity and repair as necessary.
  4. Attach the sensor harness making sure it is firmly engaged.
  5. Using a Digital Volt Ohm Meter (DVOM) set on the DC scale, backprobe the sensor signal terminal (terminal A) with the positive lead of the meter and backprobe the sensor ground terminal (terminal B) with the negative lead of the meter.
  6. Have an assistant crank the engine and observe the meter.
  7. You should have approximately a 5 volt reference signal pulse. If not the sensor may be defective.
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Posted on Jul 22, 2010


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