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Home >> Honda >> 2000 >> Insight >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> IMA System >> DTC Troubleshooting >> DTC P1562 (52): Motor Commutation Sensor B Circuit High Input

DTC P1562 (52): Motor Commutation Sensor B Circuit High Input

  1. Reset the MCM (see HOW TO RESET THE MCM ).
  2. Start the engine.

    Is DTC P1562 (52) indicated? 

    1. YES  - Go to step 3
    2. NO  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at motor commutation sensor B and at the MCM.
  3. Turn the ignition switch OFF.
  4. Turn the battery module switch OFF (see TURNING OFF POWER TO THE HIGH VOLTAGE CIRCUIT ).
  5. Remove the IPU lid (see TURNING OFF POWER TO THE HIGH VOLTAGE CIRCUIT ).
  6. Disconnect MCM connector D(16P).
  7. Disconnect the motor commutation sensor 10P connector.
  8. Connect motor commutation sensor 10P connector terminals No. 1, No. 4, and No. 8 to body ground with a jumper wire.
    Fig 1: Connecting Motor Commutation Sensor 10P Connector Terminals To Body Ground Using Jumper Wire
    G03681339Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Check for continuity between MCM connector terminals D6, D8, D10, and body ground individually.
    Fig 2: Checking Continuity Between MCM Connector Terminals D6, D8, D10 And Body Ground
    G03681340Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 10.
    2. NO  - Repair open in the wire(s) between the motor commutation sensor and the MCM (D6, D8, D10).
  10. Remove the jumper wires.
  11. Reconnect MCM connector D (16P).
  12. Turn the ignition switch ON (II).
  13. Measure voltage between MCM connector terminals D8 and D10.
    Fig 3: Measuring Voltage Between MCM Connector Terminals D8 And D10
    G03681341Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there more than 4.0 V? 

    1. YES  - Go to step 14.
    2. NO  - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
  14. Turn the ignition switch OFF.
  15. Reconnect the motor commutation sensor 10P connector.
  16. Start the engine, and let it idle.
  17. Measure voltage between MCM connector terminals D8 and D10.
    Fig 4: Measuring Voltage Between MCM Connector Terminals D8 And D10
    G03681342Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 2-4 V? 

    1. YES  - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
    2. NO  - Replace the sensor plate (see IMA MOTOR REMOVAL/INSTALLATION ) or the motor commutation sensor (see IMA MOTOR REMOVAL/INSTALLATION ).
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