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HOMESERVICE MANUALSISUZU1997OASIS SREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESCIRCUIT TESTSDTC P1706: A/T GEAR POSITION SWITCH
1997 Isuzu Oasis S

DTC P1706: A/T Gear Position Switch

1997 Isuzu Oasis SSECTION DTC P1706: A/T Gear Position Switch
NOTE: DTC P1706 indicates an open in A/T gear position switch circuit. Possible causes include a disconnected A/T gear position switch connector, an open in A/T gear position switch wire or a faulty A/T gear position switch.
  1. Check A/T gear position switch. See DTC P1705: A/T GEAR POSITION SWITCH  test. Replace switch as needed. If switch is okay, go to next step.
  2. Turn ignition on. Shift to "R" position. Measure voltage between PCM connector "B" terminal B16 and PCM connector "A" terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between terminal B16 and A/T gear position switch.
  3. Shift to "N" or "P" position. Measure voltage between PCM terminal B25 and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between terminal B25 and A/T gear position switch.
  4. Shift to "D4" position. Measure voltage between PCM terminal B24 and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between terminal B24 and A/T gear position switch.
  5. Shift to "D3" position. Measure voltage between PCM terminal B8 and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between PCM terminal B8 and A/T gear position switch.
  6. Shift to "2" position. Measure voltage between PCM terminal B17 and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between PCM terminal B17 and A/T gear position switch.
  7. Shift to "1" position. Measure voltage between PCM terminal B18 and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is less than one volt, repair open in wire between PCM terminal B18 and A/T gear position switch. If voltage is one volt or more, check for loose terminals in PCM connectors. Repair as necessary. If terminal connections are okay, substitute a known good PCM, then recheck. If symptom or indication goes away, replace original PCM.
  8. Shift to "N" or "P" position. Measure voltage between PCM terminal B and PCM terminal A9 or A22. See the WIRING DIAGRAMS article. If voltage is one volt or more, go to next step. If voltage is less than one volt, repair open in wire between PCM terminal B and A/T gear position switch.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.