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Home >> Honda >> 2002 >> Insight Automatic CVT >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Continuously Variable Automatic Transmission (CVT) >> CVT >> DTC Troubleshooting >> DTC P1888: Problem in CVT Speed Sensor Circuit >> 2001-2004 Models

2001-2004 Models

NOTE:
  • Record all freeze data and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.
  • 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 OFF.
  2. Disconnect CVT speed sensor connector.
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between CVT speed sensor connector terminal No. 1 and body ground.
    Fig 1: Measuring Voltage Between CVT Speed Sensor Connector Terminal 1 And Body Ground
    G03681810Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  -Go to step 5.
    2. NO  -Go to step  11.
  5. Turn the ignition switch OFF.
  6. Check for continuity between CVT speed sensor connector terminal No. 2 and body ground.
    Fig 2: Checking Continuity Between CVT Speed Sensor Connector Terminal 2 And Body Ground
    G03681811Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Repair a short to ground in the wire between TCM connector terminal B15and the CVT speed sensor.
    2. NO  -Go to step 7.
  7. Check for continuity between CVT speed sensor connector terminal No. 3 and body ground.
    Fig 3: Checking Continuity Between CVT Speed Sensor Connector Terminal 3 And Body Ground
    G03681812Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Go to step 8.
    2. NO  -Repair loose terminal or open in the wire between TCM connector terminal B16 and the CVT speed sensor.
  8. Turn the ignition switch ON (II).
  9. Measure the voltage between CVT speed sensor connector terminals No. 2 and No. 3.
    Fig 4: Measuring Voltage Between CVT Speed Sensor Connector Terminals 2 And 3
    G03681813Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  -Go to step  15.
    2. NO  -Go to step 10.
  10. Measure the voltage between TCM connector terminals B15 and B16.
    Fig 5: Measuring Voltage Between TCM Connector B (22P) Terminals B15 And B16
    G03681814Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  -Repair an open in the wire between TCM connector terminal B15 and the CVT speed sensor.
    2. NO  -Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) and recheck.
  11. Measure the voltage between TCM connector terminals B3 and B16.
    Fig 6: Measuring Voltage Between TCM Connector B (22P) Terminals B3 And B16
    G03681815Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  -Repair an open in the wire between TCM connector terminal B3 and the CVT speed sensor.
    2. NO  -Go to step 12.
  12. Turn the ignition switch OFF.
  13. Disconnect TCM connector B (22P).
  14. Check for continuity between TCM connector terminal B3 and body ground.
    Fig 7: Checking Continuity Between TCM Connector B (22P) Terminal B3 And Body Ground
    G03681816Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Repair a short to ground in the wire between TCM connector terminal B3 and the CVT speed sensor.
    2. NO  -Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) and recheck.
  15. Connect CVT speed sensor connector.
  16. Turn the ignition switch ON (II).
  17. Measure the voltage between TCM connector terminals B15 and B16.
    Fig 8: Measuring Voltage Between TCM Connector B (22P) Terminals B15 And B16
    G03681817Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there O V or about 5 V? 

    1. YES  -Go to step 17.
    2. NO  -Replace the CVT speed sensor.
  18. Apply the parking brake, and block both rear wheels securely.
  19. Raise the front of the vehicle, and make sure it is securely supported.
  20. Start the engine, then shift to the D position and drive the vehicle at engine idling.
  21. Measure the voltage between TCM connector terminals B15 and B16.
    Fig 9: Measuring Voltage Between TCM Connector B (22P) Terminals B15 And B16
    G03681818Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 1.5-3.5 V? 

    1. YES  -Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) and recheck.
    2. NO  -Replace the CVT speed sensor.