DTC P1572 (32): Motor Driver Module (MDM) Temperature Signal Circuit Low Input; DTC P15A0 (32): Motor Driver Module (MDM) Temperature Signal Circuit Low Input

NOTE:

Information marked with an asterisk (*) applies to 2005-2006 models.
Information marked with double asterisk (**) applies to 2000-2004 models.

Reset the MCM (see HOW TO RESET THE MCM ).
Turn the ignition switch ON (II).
Is DTC P1572 (32)** (P15A0 (32)*) 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.
Turn the ignition switch OFF.
Turn the battery module switch OFF (see TURNING OFF POWER TO THE HIGH VOLTAGE CIRCUIT ).
Remove the IPU lid (see TURNING OFF POWER TO THE HIGH VOLTAGE CIRCUIT ).
Check for continuity between body ground and MCM connector terminal B14.

Fig 1: Checking Continuity Between Body Ground And MCM Connector Terminal B14
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Go to step 7.
2. NO - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
Disconnect the power converter wire harness 24P connector.
Check for continuity between body ground and MCM connector terminal B14.

Fig 2: Checking Continuity Between Body Ground And MCM Connector Terminal B14
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Go to step 9.
2. NO - Go to step 11.
Disconnect MCM connector B (25P).
Check for continuity between body ground and MCM connector terminal B14.

Fig 3: Checking Continuity Between Body Ground And MCM Connector Terminal B14
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Repair short to ground in the wire between the MCM (B14) and the voltage converter module.
2. NO - Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
Remove the PCU (see POWER CONTROL UNIT (PCU) REMOVAL/INSTALLATION ), and disconnect the voltage converter module 16P connector.
Check for continuity between the voltage converter module case and voltage converter module 16P connector terminal No. 8.

Fig 4: Checking Continuity Between Voltage Converter Module Case And Voltage Converter Module 16P Connector Terminal No. 8
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Repair short to ground in the wire between the power converter wire harness 24P connector and the voltage converter module.
2. NO - Replace the voltage converter module and the MPI module (see POWER CONTROL UNIT (PCU) DISASSEMBLY/REASSEMBLY ).