How To Change A Crankshaft Position Sensor On A 97 Chevy Blazer

When your Chevy Blazer crank sensor begins to neglect, it can create a dangerous driving condition for your vehicle. If y'all own a Blazer with an automatic transmission, a failing creepo sensor can cause your engine to close off. Considering the creepo sensor informs your ECU of the crank position and crankshaft speed, your engine cannot run without this information.

This is why if y'all are seeing a crank sensor problem or OBDII bank check engine problem code, you must take activeness quickly to test or supersede your Blazer Crank Sensor. When your crank sensor is failing it can even cause a non start condition or cause your Blazer to have starting issues.

how to test a chevy blazer crank sensor 1

Today I'll be showing you how to test a Blazer Crank Sensor in a 2003 Chevy truck. This truck is equipped with a 4.3 liter engine, and this how to can exist applied to any 4.3, five.0 or 5.seven liter Chevy engine of this era.

This creepo sensor is connected past a three pivot weatherproof connector. These three wires are made up of power, ground and the signal wires.

how to test a chevy blazer crank angle sensor

Before you can begin testing your Blazer Crank Sensor, you will need a multimeter to test the values at each wire. Because the crank sensor is located near your transmission bell housing, you can reach this from underneath your vehicle. If you lot aren't certain what a multimeter is, or how to use a multimeter to read the DC voltage of a wire, check out our handy guide here.

How to examination your Blazer Crank Sensor

Your sensor connector is made up of three pins, and you will need to examination for power first. To do this you must insert the Blazer ignition key and plough the central to the "ON" position. With your central inserted and turned to the "ON" position, you will be powering the sensors in your engine bay.

chevy blazer crank sensor 1

To test the Blazer crank sensor for ability and ground, you volition need to use the diagram above and correspond it to the harness side. In one case you've located the creepo bending sensor on your Chevy we tin begin.

Symptoms of a declining Blazer Crank Sensor

Many of the common symptoms of a bad crank sensor can range from your Blazer not starting or difficulty starting. This can also lead into you lot Chevy Blazer shutting off while driving or not starting at all. Of course because our test vehicle is fabricated afterwards 1996, there are likewise several OBDII cheque engine trouble codes that tin can ascend from the failing sensor.

P0336 CKP Sensor Circuit Performance
P0337 CKP Sensor Circuit Depression Frequency Code
P0338 CKP Sensor Circuit High Frequency Code
P0339 CKP Sensor Circuit Intermittent

These crankshaft angle sensor cheque engine trouble codes are merely the starting time of your problems. Failing crank sensors can be very dangerous, especially if you own an automated manual equipped Blazer. If your engine stalls at speed, there'southward no chance that you tin restart it at speed without some serious risk or danger.

Testing the Blazer Crank Sensor for Power

To begin our how-to guide to testing your Blazer Crank sensor, you will begin checking for ability and ground. This is done through your wiring harness, and keep in mind that you lot need the ignition central inserted and turned to the "ON" position.

The pin you will be testing is Pin 1, and this wire should be a 12 volt DC signal from your engine harness. This is the aforementioned whether y'all ain a 4.3L, 5.0L or five.7L equipped GM vehicle. If y'all have power at this wire, you tin motion onto checking for the low reference basis signal.

The ground wire is PIN 2, and if you have a footing signal here, that means your crank angle sensor should be working just fine. Chances are if your sensor is getting power and ground at these wires, your crank bending sensor in your Chevy has gone bad.

You tin can accept one stride further if you can trace the wiring harness dorsum from Pin 3. If possible you should be able to tap into Pin 3 to bank check and run across if in that location'southward a v volt signal being sent when you crank your engine.

Never stay under the vehicle when you are cranking your engine, and yous should skip this step unless you lot can trace dorsum the wiring to a safe location. Practice non attempt to test or cheque this wire from under the vehicle or near your crank angle sensor. If you take any questions check our guide on safety for working on your vehicle hither.

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