Probation the Eccentric person Sensor in a 1993 Chevy Blazer 4.3
The Eccentric person sensor on a 1993 Chevy Blazer 4.3 is located to the left of the harmonic balancer. The Eccentric person sensor is a hall-effect Slogan that signals the pc the mark of top dead centre on the character 1 cylinder. The personal computer uses this news to impel the timing for firing the Glimmer plugs. A failing sensor Testament packages erratic signals to the personal computer, causing a Rugged running engine. In severe cases, in the absence of a dependable locution, the pc Testament resort to a limp down home money.
Instructions
1. Proof the sprint for the "proof engine lustrous." Provided the glassy is illuminated, pull the codes to complete the type of failure fixed by the personal computer by connecting a law scanner to the OBD Harbour under the left side of the sprint and steering contour. Turn the ignition primary on and press the main on the scanner glaring "Announce." The regulation Testament be displayed in a five-character identifier. It Testament get a mail followed by four numbers. Cross-reference this regulation with the edict description sheet accompanying the scanner. The sheet will give a description of the problem area. If it mentions the crank sensor, this is a problem area.
2. Connect the computer scanner to the crankshaft sensor. The electrical connector has three wires. The center wire is the ground and the wire to the right, looking at it from the front, is the 12-volt input. The wire to the left is the signal wire. Probe the left signal wire with the red lead of the scanner. Start the engine and observe the scanner screen. The sine wave should look like a series of rectangular waves at equal distribution. All should look evenly spaced and the same exact height with no abnormalities.
Attach the black lead to a good ground. Turn the scanner on and set it to the crankshaft sensor test.3. Any intermittent spikes, uneven spacing or black outs (where a wave disappears) indicate a failing crankshaft sensor.
4. With the engine off, check the crank sensor for a failure or for no signal output. For this a voltmeter can be used. Turn the voltmeter to the 20-volt setting. Connect the red lead to the center wire on the sensor connector. Connect the black wire to a good ground. Turn the key on and note the results on the voltmeter. The indication should be less than 100mv. If any deviation higher than 100mv the sensor has failed. If there is no voltage reading, connect the red lead to the right side of the connector when facing it. The voltage should be 12 volts. If there is no voltage the problem is in the wiring. If there is 12 volts, the sensor has failed.
