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DTC 23: Abnormal Transmission Input

  1. Turn ignition OFF. Place gearshift lever in Park (A/T) or Neutral (M/T). Disconnect EHCU harness connector. Check for continuity between EHCU harness connector terminals No. 6 (Violet/White wire) and No. 15 (Black wire). If continuity is present, repair short in transmission switch or Violet/White as necessary. After repairs, go to step  6 . If continuity is not present, go to next step.
  2. If vehicle is equipped with automatic transmission, go to next step. If vehicle is equipped with manual transmission, go to step  4 .
  3. Turn ignition ON. Measure voltage between EHCU harness connector terminals No. 6 (Violet/White wire) and No. 15 (Black wire). If voltage is less than 6 volts with gearshift lever in "L" and "R" positions, leave DVOM connected and go to step  5 . If voltage is not less than 6 volts, check for faulty harness between transmission switch and EHCU. If no problem is found, replace transmission switch. After repairs, go to step  6 .
  4. Turn ignition ON. Measure voltage between EHCU harness connector terminals No. 6 (Violet/White wire) and No. 15 (Black wire). If voltage is greater than 9.6 volts with gearshift lever in 1st, 2nd and Reverse, leave DVOM connected and go to next step. If voltage is not greater than 9.6 volts, check for faulty harness between transmission switch and EHCU. If no problem is found, replace transmission switch. After repairs, go to step  6 .
  5. If voltage is 6.6-9.0 volts with gearshift lever in "P", "N", "D", "3" or "2" positions (A/T), or in 2nd, 3rd, 4th and Neutral (M/T), check for faulty transmission switch or harness. Repair as necessary and check system operation. See SYSTEM OPERATION CHECK  under TROUBLE SHOOTING. If no problem is found, replace EHCU. If voltage is not 6.6-9.0 volts, replace transmission switch or repair harness as necessary. After repairs, go to next step.
  6. Reconnect all components. Ensure all components are properly installed. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under DIAGNOSIS & TESTING. Verify system operation. See SYSTEM OPERATION CHECK  under TROUBLE SHOOTING.
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