Testing the hit sensors can seem fairly the challenge, due to the fact that they\"re situated under the intake manifold.
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But you deserve to test them without removing the entry manifold and with just a straightforward multimeter.
In this indict I\"ll show you how. You\"ll be able to easily uncover out if one or both hit sensors are poor or not.
NOTE: This tutorial applies to the adhering to vehicles:
Chevrolet:Silverado (1500, 2500):4.8L, 5.3L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Silverado (2500):6.0L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Suburban (1500):5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006Suburban (2500):6.0L: 2000, 2001, 2002, 2003, 2004, 2005, 2006Tahoe:4.8L, 5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
GMC:Sierra (1500, 2500):4.8L, 5.3L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Sierra (2500):6.0L: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Yukon:4.8L, 5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006Yukon XL (1500):5.3L: 2000, 2001, 2002, 2003, 2004, 2005, 2006Yukon XL (2500):6.0L: 2000, 2001, 2002, 2003, 2004, 2005, 2006
RELATED trouble CODES:
Symptoms that A negative Knock Sensor
When the punch sensor fails, the fuel injection computer system will irradiate up the examine engine light through one (or both) of the following trouble codes:P0327 knock Sensor No. 1 Circuit Problem.P0332 knock Sensor No. 2 Circuit Problem.
You\"re likewise going to watch one or much more of the following symptoms:Engine hit (ping) when accelerating the vehicle.Lack of power when increasing under load.The auto will not pass the emissions test.
Knock Sensor Wiring harness Connector pin Out
Below room the circuit explanation of the 2 wires that the hit sensors jumper wiring harness.
The knock sensors jumper wiring exploit connector is located on the left next (driver side) the the entry manifold. See picture 2 the 2 in the image viewer above.
|A||Dark blue (DK BLU)||Knock Sensor No. 1 Signal|
|B||Light blue (LT BLU)||Knock Sensor No. 2 Signal|
Where to Buy The punch Sensor and also Save
If you discover that one knock sensor is bad, climate it\"s recommended that you have to replace both and also their wiring harness.
Since you\"ll have to remove the entry manifold to accessibility the punch sensors, I want to additionally recommend the you protect against buying cheap brand-X knock-off hit sensors.
The following links will help you to compare shop because that these items of known brand surname (AC-Delco, Dorman, traditional Motor Products):
NOTE: The over knock sensor and related contents fit the following vehicles: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 V8 Chevrolet Silverado, Suburban, Tahoe and GMC Sierra, Tahoe, Tahoe XL.
TEST 1: experimentation Knock Sensor 1 (Front Sensor)
Testing hit sensor 1 simply entails testing its resistance with a multimeter in Ohms mode.
The wire the we\"re gonna\" test, to check the inner resistance of punch sensor 1, is the dark blue (DK BLU) cable of the connector in the photograph above.
In the picture above, I\"ve labeling the DK BLU wire with the letter A.
RESISTANCE SPECIFICATION: The resistance specification of knock sensor 1 is 93 come 107 K Ohms.
Let\"s acquire started:
Place your multimeter in Ohms mode.
Disconnect the punch sensors jumper wiring harness.The hit sensors jumper wiring harness is located on the left next (driver side) that the entry manifold. See photo above.
Connect the red multimeter test lead to the male terminal that connects come the dark blue (DK BLU) wire that the connector.The DK BLU cable is figured out with the letter A in the picture above.NOTE: This test is done on the knock sensors jumper wiring harness connector that has actually male spade terminals.
Ground the black multimeter check lead straight on the battery negative (-) post.
You need to see a resistance value in between 93 to 107 K Ohms on her multimeter.
Let\"s analyze your check results:
CASE 1: The resistance of punch sensor 1 is in ~ the shown range. This is the correct test result and it lets you know that knock sensor 1 is good.
You can also conclude the there are no wiring difficulties with the punch sensors jumper wiring harness.
If the engine is knocking (pinging), then this test an outcome lets you know that the resource of the difficulty is one engine mechanically problem.
CASE 2: The resistance of knock sensor 1 IS no within the suggested range. This test an outcome generally allows you know that hit sensor 1 is bad and also needs to be replaced.
The next step is to remove the entry manifold and:Visually inspect knock sensor 1 and see if it\"s damaged or corroded.Visually examine the punch sensors jumper wiring harness for damages or corrosion.
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Replace any component the is damaged/corroded.