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DTC P1739/26: 3RD Clutch Pressure Switch

NOTE: For circuit reference, see CONNECTOR IDENTIFICATION , PIN VOLTAGE TESTS  and WIRING DIAGRAMS  .
  1. Using scan tool, retrieve A/T freeze data. Clear DTCs 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. By backprobing PCM harness connectors "B" and "D", measure voltage between terminal No. 13 on connector "D" and terminal No. 20 or 22 on connector "B". See Figure. If battery voltage is present, go to step  4. If battery voltage is not present, go to next step.
  3. Turn ignition off. Disconnect PCM harness connector "D". Disconnect 3rd clutch pressure switch connector. See Figure. Check for continuity between ground and terminal No. 13 on PCM harness connector "D". If continuity is not present, go to step  6. If continuity is present, repair short to ground in Blue/White wire between PCM and 3rd clutch pressure switch. See WIRING DIAGRAMS .
  4. Raise and support front of vehicle. Set parking brake and block rear wheels. Start engine. On models equipped with Traction Control System (TCS), cancel TCS. On all models, move gearshift lever to "D3" position. Run vehicle in "D3" position for more than 5 seconds. Measure voltage between terminal No. 13 on PCM harness connector "D" and terminal No. 20 or 22 on PCM harness connector "B". If voltage is about zero volts, check connections and replace PCM with a known-good unit as necessary. Recheck system. If voltage is not about zero volts, go to next step.
  5. Turn ignition off. Disconnect 3rd clutch pressure switch connector. See Figure. Turn ignition on. Measure voltage between ground and 3rd clutch pressure switch connector terminal. If battery voltage is present, go to next step. If battery voltage is not present, repair open or short in Blue/White wire between PCM harness connector "D" and 3rd clutch pressure switch connector. See WIRING DIAGRAMS .
  6. Turn ignition off. Measure resistance between ground and 3rd clutch pressure switch connector terminal. If resistance is 10 megohms or more, check for loose PCM or 3rd clutch pressure switch harness connectors. Check connections and replace PCM with a known-good unit if necessary. If resistance is less than 10 megohms, replace 3rd clutch pressure switch. See 3RD CLUTCH PRESSURE SWITCH  under REMOVAL & INSTALLATION.
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