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Home >> Acura >> 2007 >> TSX Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission) >> DTC Troubleshooting >> DTC P0812: Open in Transmission Range Switch ATP RVS Switch Circuit ('04-06 Models); DTC P1717: Open in Transmission Range Switch ATP RVS Switch Circuit ('07-08 Models)
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DTC P0812: Open in Transmission Range Switch ATP RVS Switch Circuit ('04-06 Models); DTC P1717: Open in Transmission Range Switch ATP RVS Switch Circuit ('07-08 Models)

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION  ).
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  1. Turn the ignition switch to ON (II).
  2. Shift the shift lever to R, and check the A/T R SWITCH in the DATA LIST with the HDS.

    Is the A/T R SWITCH ON? 

    YES  - Go to step 3.

    NO  - Inspect the end of the selector control shaft (see step 7 on TRANSMISSION RANGE SWITCH TEST  ), adjust the shift cable (see SHIFT CABLE ADJUSTMENT  ), then recheck. If the problem still exists, go to step  4.

  3. Check the REVERSE SWITCH in the DATA LIST with the HDS.

    Is the REVERSE SWITCH ON? 

    YES  - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the transmission range switch and the PCM.

    NO  - Go to step 4.

  4. Turn the ignition switch to LOCK (0).
  5. Check for continuity between PCM connector terminal A8 and body ground, and between PCM connector terminal A9 and body ground.
    Fig 1: Checking Continuity Between PCM Connector Terminal A8 And A9 Body Ground
    G05491265Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 6.

    NO  - Repair open in the wires between PCM connector terminals A8, A9, and ground (G101), and repair poor ground (G101), then go to step  12.

  6. Turn the ignition switch to ON (II).
  7. Shift the shift lever to R.
  8. Measure the voltage between PCM connector terminals C12 and A9.
    Fig 2: Measuring Voltage Between PCM Connector Terminals C12 And A9
    G05491266Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  - Go to step 9.

    NO  - Check for poor connections or loose terminals between PCM connector terminal C12 and the transmission range switch. If the connection is OK, go to step  20.

  9. Turn the ignition switch to LOCK (0).
  10. Disconnect the transmission range switch connector.
  11. Check for continuity between transmission range switch connector terminals No. 1 and No. 10. The shift position must be R.
    Fig 3: Checking Continuity Between Transmission Range Switch Connector Terminals 1 And 10
    G05491267Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Check for poor connections or loose terminals between transmission range switch connector terminal No. 1 and PCM connector terminal C12. If the connection is OK, repair open in the wire between PCM connector terminal C12 and the transmission range switch, then go to step 12.

    NO  - Replace the transmission range switch, then go to step 12.

  12. Reconnect all connectors.
  13. Turn the ignition switch to ON (II).
  14. Clear the DTC with the HDS.
  15. Start the engine.
  16. With the brake pedal pressed, shift the shift lever slowly from P to N, then shift to R.
  17. Turn the ignition switch to LOCK (0), and repeat the test-drive in step  15 and step  16.
  18. Check for DTCs with the HDS.

    Is DTC P0812 or P1717 indicated? 

    YES  - Check for poor connections or loose terminals between the transmission range switch and the PCM, then go to step  1.

    NO  - Go to step 19.

  19. Monitor the OBD STATUS for P0812 or P1717 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  - Troubleshooting is complete. If any other DTCs were indicated in step  18, go to the INDICATED DTCS TROUBLESHOOTING .

    NO  - If the screen indicates FAILED, check for poor connections or loose terminals between the transmission range switch and the PCM, then go to step  1. If the screen indicates NOT COMPLETED, go to step  15.

  20. Update the PCM if it does not have the latest software (see UPDATING THE PCM  ), or substitute a known-good PCM (see SUBSTITUTING THE PCM  ).
  21. Start the engine.
  22. With the brake pedal pressed, shift the shift lever slowly from P to N, then shift to R.
  23. Turn the ignition switch to LOCK (0), and repeat the test-drive in step  21 and step  22.
  24. Check for DTCs with the HDS.

    Is DTC P0812 or P1717 indicated? 

    YES  - Check for poor connections or loose terminals between the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM  ), then go to step  21. If the PCM was substituted, go to step  1.

    NO  - Go to step 25.

  25. Monitor the OBD STATUS for P0812 or P1717 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM; '04-05 models (see '04-05 MODELS ), '06-08 models (see '06-08 MODELS ). If any other DTCs were indicated in step  24, go to the INDICATED DTCS TROUBLESHOOTING .

    NO  - If the screen indicates FAILED, check for poor connections or loose terminals between the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM  ), then go to step  21. If the PCM was substituted, go to step  1. If the screen indicates NOT COMPLETED, go to step  21.

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