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Wide Open Throttle (Wot) Switch

  1. Disconnect wiring harness from WOT switch. Connect ohmmeter leads to switch terminals, and manually open and close the switch. When switch is closed, resistance should be infinite. A low resistance should be indicated at wide open position. Test switch operation several times. Replace WOT switch if defective. Reconnect wiring harness.
  2. With ignition switch "ON", connect voltmeter between pin 6 and pin 7 (ground) of diagnostic connector D2. Voltage should be zero with switch in wide open position and greater than 2 volts in any other position.
  3. If voltage is always zero, test for short circuit to ground in wiring harness or switch. Check for open circuit between pin 8 of ECU connector and the switch connector. Repair or replace wiring harness as necessary.
  4. If voltage is always greater than 2 volts, test for an open wire or connector between the switch and ground. Repair as required.
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