LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2004 >> Insight Standard >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> IMA System >> DTC Troubleshooting >> DTC P1572 (33): Motor Driver Module (MDM) Temperature Signal Circuit High Input; DTC P15A1 (33): Motor Driver Module (MDM) Temperature Signal Circuit High Input
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P1572 (33): Motor Driver Module (MDM) Temperature Signal Circuit High Input; DTC P15A1 (33): Motor Driver Module (MDM) Temperature 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 P1572 (33)** (P15A1 (33)*) 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 voltage converter module 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 B14 and D5.
    Fig 1: Measuring Voltage Between MCM Connector Terminals B14 And D5
    G03681362Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  - Go to step 8.
    2. NO  - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
  8. Measure voltage between power converter wire harness 24P connector terminal No. 1 and MCM connector terminal B14.
    Fig 2: Measuring Voltage Between Power Converter Wire Harness 24P Connector Terminal No. 1 And MCM Connector Terminal B14
    G03681363Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  - Repair open in the wire between the MCM (B14) and the power converter wire harness 24P connector.
    2. NO  - Go to step 9.
  9. Turn the ignition switch OFF.
  10. Check for continuity between power converter wire harness 24P connector terminal No. 14 and MCM connector terminal D5.
    Fig 3: Checking Continuity Between Power Converter Wire Harness 24P Connector Terminal No. 14 And MCM Connector Terminal D5
    G03681364Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 11.
    2. NO  - Repair open in the wire between the MCM (D5) and the power converter wire harness 24P connector.
  11. Remove the PCU (see POWER CONTROL UNIT (PCU) REMOVAL/INSTALLATION ). Check for continuity between power converter wire harness 24P connector terminal No. 1 and voltage converter module 16P connector terminal No. 8.
    Fig 4: Checking Continuity Between Power Converter Wire Harness 24P Connector Terminal No. 1 And Voltage Converter Module 16P Connector Terminal No. 8
    G03681365Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 12.
    2. NO  - Repair open in the wire between the power converter wire harness 24P connector and the voltage converter module.
  12. Check for continuity between power converter wire harness 24P connector terminal No. 14 and voltage converter module 16P connector terminal No. 16.
    Fig 5: Checking Continuity Between Power Converter Wire Harness 24P Connector Terminal No. 14 And Voltage Converter Module 16P Connector Terminal No. 16
    G03681366Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Replace the voltage converter module and the MPI module (see POWER CONTROL UNIT (PCU) DISASSEMBLY/REASSEMBLY ).
    2. NO  - Repair open in the wire between the power converter wire harness 24P connector and the voltage converter module.
scientia non olet · About LEMON Manuals