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Manual Transmission Neutral Switch

  1. Connect PGM-FI test harness between ECU and ECU connectors. Turn ignition on. Place transmission in Neutral, and measure voltage between ECU terminal B7 (positive) and A26 (negative). If voltage is not present, go to step 3).
  2. If voltage exists, disconnect manual transmission neutral switch 2-wire connector located on side of transmission. Connect White wire terminal to Black wire terminal. If voltage is not present, replace neutral switch. If voltage is present, repair open in White wire between ECU terminal B7 and neutral switch.
  3. Shift transmission into gear. If about 10 volts is present, manual transmission neutral switch is okay. If battery voltage is not present, disconnect PGM-FI test harness connector "B" from main wire harness only; DO NOT  disconnect from ECU. If 10 volts is not present, substitute a known good ECU and recheck.
  4. If about 10 volts is present, reconnect connector "B", and disconnect 2-wire connector on manual transmission neutral switch. If battery voltage is present, replace switch. If battery voltage is not present, repair short in White wire between ECU and manual transmission neutral switch.
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