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DTC P0706: Open in Transmission Range Switch Circuit

NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the 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. Make sure the shift cable is adjusted properly (see SHIFT CABLE ADJUSTMENT ).
  2. Turn the ignition switch to ON (II).
  3. Compare the ATPP, ATPR, ATPN, ATPD, ATPS, ATPL, and ATPFWD inputs with the HDS to the following table in each shift lever position.
      ATP P ATP R ATP N ATP D ATP S ATP L ATP FWD
    P ON OFF OFF OFF OFF OFF OFF
    R OFF ON OFF OFF OFF OFF OFF
    N OFF OFF ON OFF OFF OFF OFF
    D OFF OFF OFF ON OFF OFF ON
    S OFF OFF OFF OFF ON OFF ON
    L OFF OFF OFF OFF OFF ON OFF

    Do the transmission range switch signals match? 

    YES  -Intermittent failure, the system is OK at this time.

    NO  -Go to step 4.

  4. Compare the ATPP, ATPR, ATPN, ATPD, ATPS, ATPL, and ATPFWD inputs with the HDS to the table in step  3 in each shift lever position.

    Do all shift positions remain OFF? 

    YES  -Go to step  14.

    NO  -Go to step 5.

  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the transmission range switch 8P connector.
  7. Connect the transmission range switch 8P connector terminal which did not indicate ON in step  4 to body ground with a jumper wire; refer to the following chart.
      Transmission range switch 8P connector Wire color
    ATPP No. 6 BLU/BLK
    ATPR No. 1 WHT
    ATPN No. 5 RED/BLK
    ATPD No. 3 PNK
    ATPS No. 7 BLU/WHT
    ATPL No. 4 BLU
    ATPFWD No. 8 BLU/YEL
  8. Turn the ignition switch to ON (II).
  9. Check the transmission range switch signals that did not indicate ON with the HDS.

    Does the transmission range switch indicate ON? 

    YES  -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT ).

    NO  -Go to step 10.

  10. Turn the ignition switch to LOCK (0).
  11. Jump the SCS line with the HDS.
  12. Disconnect PCM connector B (49P).
  13. Check for continuity between the transmission range switch 8P connector terminal and the PCM connector terminal of the input which indicated ON; refer to the following chart.
      PCM connector Transmission range switch 8P connector Wire color
    ATP P B14 No. 6 BLU/BLK
    ATP R B15 No. 1 WHT
    ATP N B13 No. 5 RED/BLK
    ATP D B25 No. 3 PNK
    ATP S B16 No. 7 BLU/WHT
    ATP L B17 No. 4 BLU
    ATP FWD B29 No. 8 BLU/YEL

    Is there continuity? 

    YES  -Replace the PCM (see PCM REPLACEMENT ).

    NO  -Repair an open in the wire between the transmission range switch and the PCM.

  14. Turn the ignition switch to LOCK (0).
  15. Disconnect the transmission range switch 8P connector.
  16. Check for continuity between transmission range switch 8P connector terminal No. 2 and body ground.
    Fig 1: Checking Continuity Between Transmission Range Switch 8P Connector Terminal 2 And Body Ground
    G08093060Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT ).

    NO  -Repair an open in the wire between the transmission range switch and body ground (G101), or repair poor body ground (G101).

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