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Code 28: Knock Sensor No. 2

NOTE: Refer to illustration for ECU connector and terminal identification. See Figure .
  1. Turn ignition switch to ON position. Using a DVOM, check voltage between ECU connector B61, terminal No. 6 and ground. Voltage should be 3-4 volts. If voltage is not as specified, go to next step. If voltage is as specified, check ECU connector terminals for good contact. Repair as necessary. If connector terminals are okay, replace ECU.
  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 ECU and knock sensor. If resistance is not as specified, replace knock sensor.
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