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Diagnosing Honda Accord EX with Trouble Code P0325 Denver CO

An illuminated check engine light on a customer’s 1998 Honda Accord EX, that is registering a trouble code P0325, could be caused by the knock sensor, the connection, wire harness or the Engine Control Module (ECM). Replace the knock sensor and the trouble code resets.
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Diagnosing Honda Accord EX with Trouble Code P0325


December 10, 2008

An illuminated check engine light on a customer's 1998 Honda Accord EX, that is registering a trouble code P0325, could be caused by the knock sensor, the connection, wire harness or the Engine Control Module (ECM). Replace the knock sensor and the trouble code resets. With the knock sensor unplugged and using a digital volt ....

An illuminated check engine light on a customer’s 1998 Honda Accord EX, that is registering a trouble code P0325, could be caused by the knock sensor, the connection, wire harness or the Engine Control Module (ECM). Replace the knock sensor and the trouble code resets.

Tests:
1. With the knock sensor unplugged and using a digital volt ohmmeter (DVOM), check for 0.02V to 0.03V reference voltage from the ECM to the knock sensor.

     
2. Next use a scope and look for an AC voltage signal from the knock sensor when the engine rpm is increased. It should have a very rapid AC voltage pattern of 1V positive and 1V negative. If the signal is OK, verify that signal is correct back to the ECM. If there is no harness or knock sensor problem, always verify the connection at the ECM before replacing the ECM.
     
Tech Tip:
The knock sensor harness is a shielded wire, so also unplug the alternator and verify that there is no interference in that circuit.

Courtesy of Identifix.

For more information, visit www.identifix.com .

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Honda Accord Recall
from: NHTSA - Auto Recalls
1990 Honda Accord
Unique Recall ID#
31517000008038000000000
Vehicle/Equipment Year/Make/Model
1990 Honda Accord
Recalled Component Description:
Exterior Lighting: Headlights
Defect Summary:
Dope, Inc. Is Recalling 42,540 Combination Corner And Bumper Lamp Assemblies Of Various Part Numbers Sold For Use As Aftermarket Equipment For Various Passenger Vehicles. These Headlamps Fail To Conform To The Requirements Of Federal Motor Vehicle Safety
Consequence Summary:
Decreased Lighting Visibility May Result In A Vehicle Crash.
Corrective Summary:
Dope, Inc. Will Notify Owners And Offer A Full Refund For The Noncompliant Combination Lamps. The Safety Recall Began On July 28, 2009. Owners May Contact Dope, Inc. At 1-626-272-1798.
Source: NHTSA’s Office of Defects Investigation (ODI)
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