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DTC P1730: Shift Error B: Notes

Fig 1: DTC Troubleshooting Flow Chart (P1730)
G08875470Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information  See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
DTC Description Confirmed DTC Pending DTC Freeze Frame
P1730 Shift Error B      
  1. ATF check:
    • 1. Warm up the engine to normal operating temperature (the radiator fan comes on).
    • 2. Make sure that the transmission is filled to the proper level, and check for fluid leaks.
    • 3. DRAIN THE ATF through a strainer. Inspect the strainer for metal debris or excessive clutch material.

    Does the strainer have metal debris or excessive clutch material? 

    YES  : Replace the transmission  See AUTOMATIC TRANSMISSION DISASSEMBLY AND REASSEMBLY or AUTOMATIC TRANSMISSION REMOVAL AND INSTALLATION , then do the repair verification  .

    NO  : REPLACE THE ATF , then go to step 2.

  2. Problem verification (test-drive):
    • 1. Turn the ignition switch to ON (II).
    • 2. Clear the DTC with the HDS.
    • 3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.
    • 4. Monitor the OBD STATUS for P1730 in the DTCs MENU with the HDS.
      DTC Description OBD Status
      P1730 Shift Error B  

    Does the HDS indicate FAILED? 

    YES  : The failure is duplicated. Go to step 3.

    NO  : If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, test-drive again.

  3. Shift solenoid valve A operation check:
    • 1. Clear the DTC with the HDS.
    • 2. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and check that shift solenoid valve A operates with the HDS.

    Is a clicking sound heard? 

    YES  : Shift solenoid valve A is OK. Go to step 4.

    NO  : REPLACE SHIFT SOLENOID VALVE A , then do the repair verification  .

  4. Shift solenoid valve B operation check:
    • 1. Select Shift Solenoid Valve B in the Miscellaneous Test Menu, and check that shift solenoid valve B operates with the HDS.

    Is a clicking sound heard? 

    YES  : Shift solenoid valve B is OK. Go to step 5.

    NO  : REPLACE SHIFT SOLENOID VALVE B , then do the repair verification  .

  5. Shift solenoid valve D operation check:
    • 1. Select Shift Solenoid Valve D in the Miscellaneous Test Menu, and check that shift solenoid valve D operates with the HDS.

    Is a clicking sound heard? 

    YES  : Shift solenoid valve D is OK. Go to step 6.

    NO  : REPLACE SHIFT SOLENOID VALVE D , then do the repair verification  .

  6. Problem verification (OBD STATUS check):
    • 1. Turn the ignition switch to ON (II).
    • 2. Clear the DTC with the HDS.
    • 3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.
    • 4. Monitor the OBD STATUS for P1730 in the DTCs MENU with the HDS.
      DTC Description OBD Status
      P1730 Shift Error B  

    Does the HDS indicate FAILED? 

    YES  : The failure is duplicated. Repair the hydraulic system related with shift valves A, B, and D, or replace the transmission  See AUTOMATIC TRANSMISSION DISASSEMBLY AND REASSEMBLY or AUTOMATIC TRANSMISSION REMOVAL AND INSTALLATION , then do the repair verification  .

    NO  : If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, test-drive again.

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