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DTC P1705/5: Shorted A/T Gear Position Switch

WARNING: This page is about a different variant/trim than selected.
NOTE: For circuit and terminal identification, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAMS  .
NOTE: DTC P1705/5 is set when PCM receives 2 gear position signals at the same time.
  1. Using scan tool, retrieve freeze data. Clear DTC and road test vehicle under same conditions freeze data was recorded. If DTC returns, go to next step. If DTC does not return, problem is intermittent, check transaxle and PCM connections.
  2. Turn ignition on. Observe gear position indicator lights while moving selector lever to each gear position. If any indicator light stays illuminated when selector lever is not in indicated position, go to next step. If gear position indicator lights illuminate in appropriate selector lever position, system is okay. Check for loose or damaged harness connectors.
  3. Disconnect A/T gear position switch connector. If no A/T gear position switch indicators are illuminated, replace A/T gear position switch. See A/T GEAR POSITION SWITCH  under REMOVAL & INSTALLATION. If any A/T gear position switch indicators are illuminated, go to next step.
  4. Turn ignition off. Connect A/T gear position switch connector. Turn ignition on. Move selector lever through all positions except Reverse. Measure voltage between PCM harness connector "D" terminal No. 6 (White wire) and connector "B" terminal No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, inspect the following items. Repair as needed.
    • Check for short in wire between PCM harness connector "D" terminal No. 6 and A/T gear position indicator.
    • Inspect A/T gear position switch. See A/T GEAR POSITION SWITCH  under COMPONENT TESTS.
    • Check for continuity between PCM harness connector "B" terminal No. 20 and 22 and ground.
    • Check for loose PCM harness.
    • If no problems are found, substitute a known good PCM and retest system.
  5. Move selector lever through all positions except Neutral and Park. Measure voltage between PCM harness connector "D" terminal No. 13 (Light Green wire) and connector "B" terminal No. 20 or 22 (Brown/Black wires). If 5 volts is present, go to next step. If 5 volts is not present, inspect the following items. Repair as needed.
    • Check for short in wire between PCM harness connector "B" terminal No. 14 and A/T gear position switch.
    • Check for short in signal wire between A/T gear position switch and A/T gear position indicator.
    • Check for loose PCM harness connectors.
    • If no problems are found, substitute a known good PCM and retest system.
  6. Move selector lever through all positions except "D". Measure voltage between PCM harness connector "D" terminal No. 9 (Yellow wire) and connector "B" terminal No. 20 or 22 (Brown/Black wires). If about 5 volts is present, go to next step. If about 5 volts is not present, inspect the following items. Repair as needed.
    • Check for short in wire between PCM harness connector "D" terminal No. 9 and A/T gear position switch.
    • Check for short in signal wire between A/T gear position switch and A/T gear position indicator.
    • Check for loose PCM harness connectors.
    • If no problems are found, substitute a known good PCM and retest system.
  7. Move selector lever through all positions except "2". Measure voltage between PCM harness connector "D" terminal No. 14 (Blue wire) and connector "B" terminal No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, inspect the following items. Repair as needed.
    • Check for short in wire between PCM harness connector "D" terminal No. 14 and A/T gear position switch.
    • Check for short in signal wire between A/T gear position switch and A/T gear position indicator.
    • Check for loose PCM harness connectors.
    • If no problems are found, substitute a known good PCM and retest system.
  8. Move selector lever through all positions except "1". Measure voltage between PCM harness connector "D" terminal No. 15 (Brown wire) and connector "B" terminal No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, inspect the following items. Repair as needed.
    • Check for short in wire between PCM harness connector "D" terminal No. 15 and A/T gear position switch.
    • Check for short in signal wire between A/T gear position switch and A/T gear position indicator.
    • Check for loose PCM harness connectors.
    • If no problems are found, substitute a known good PCM and retest system.
  9. Inspect PCM for loose connectors or damaged terminals. Repair as needed. If connectors are clean and tight, replace PCM with a known-good unit and retest system. If DTC P1705/5 is still present, repeat diagnostic procedure.
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