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DTC P0A65 (29): Motor Current W Phase Signal Circuit High Input; DTC P1584 (29): Motor Current W Phase Signal Circuit High Input

NOTE:
  • Information marked with an asterisk (*) applies to 2005-2006 models.
  • Information marked with double asterisk (**) applies to 2000-2004 models.
  1. Reset the MCM (see HOW TO RESET THE MCM ).
  2. Turn the ignition switch ON (II).

    Is DTC P0A65 (29)* (P1584 (29)**) 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 the W phase motor current sensor 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. Turn the ignition switch ON (II).
  7. Measure voltage between MCM connector terminals B6 and B21.
    Fig 1: Measuring Voltage Between MCM Connector Terminals B6 And B21
    G03681299Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 4.8 V? 

    1. YES  - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
    2. NO  - Go to step 8.
  8. Measure voltage between MCM connector terminals B21 and C25.
    Fig 2: Measuring Voltage Between MCM Connector Terminals B21 And C25
    G03681300Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  - Go to step 9.
    2. NO  - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
  9. Turn the ignition switch OFF.
  10. Disconnect the power converter wire harness 24P connector.
  11. Turn the ignition switch ON (II).
  12. Measure voltage between power converter wire harness 24P connector terminals No. 8 and No. 11.
    Fig 3: Measuring Voltage Between Power Converter Wire Harness 24P Connector Terminals No. 8 And 11
    G03681301Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  - Go to step 13.
    2. NO  - Repair open in the wire between the MCM (B21) and the power connector wire harness 24P connector.
  13. Turn the ignition switch OFF.
  14. Remove the PCU (see POWER CONTROL UNIT (PCU) REMOVAL/INSTALLATION ). Check for continuity between W phase motor current sensor 3P connector terminal No. 2 and power converter wire harness 24P connector terminal No. 11.
    Fig 4: Checking Continuity Between W Phase Motor Current Sensor 3P Connector Terminal No. 2 And 24P Connector Terminal No. 11
    G03681302Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Replace the W phase motor current sensor (see POWER CONTROL UNIT (PCU) DISASSEMBLY/REASSEMBLY ).
    2. NO  - Repair open in wire between the W phase motor current sensor and the power converter wire harness 24P connector.
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