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Code 28 - Knock Sensor No. 2 - L/H

NOTE: Refer to illustration for ECM connector terminal identification. See Figure .
  1. Turn ignition on. Using a DVOM, check voltage between ECM connector terminal C6 and ground. Voltage should be 3-4 volts. If voltage is not as specified, go to next step. If voltage is as specified, check ECM connector terminals for good contact. Repair as necessary. If connector terminals are okay, replace ECM.
  2. Remove collector and disconnect knock sensor connector, located on side of block. Using an ohmmeter, check resistance between knock sensor terminal and ground. Resistance should be about 560,000 ohms. If resistance is as specified, repair circuit between ECM and knock sensor. If resistance is not as specified, replace knock sensor.
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