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DTC P0A3C (39): Motor Driver Module (MDM) Overheating; DTC P1438 (39): Motor Driver Module (MDM) Overheating

NOTE:
  • Information marked with an asterisk (*) applies to 2005-2006 models.
  • Information marked with double asterisk (**) applies to 2000-2004 models.
  1. Turn the ignition switch ON (II), and check for DTCs.

    Is DTC P1429 (38)* (P1438 (38)**) indicated? 

    1. YES  - Do the troubleshooting procedure for DTC P1429 (38)* (P1438 (38)**) (see DTC P1429 (38): MOTOR DRIVER MODULE (MDM) OVERHEATING SIGNAL CIRCUIT PROBLEM, DTC P1438 (38): MOTOR DRIVER MODULE (MDM) OVERHEATING SIGNAL CIRCUIT PROBLEM ), and recheck.
    2. NO  - Go to step 2.
  2. Check for DTCs.

    Is DTC P0A3C (39)* (P1438 (39)**) 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. Check the MPI module fan (see MOTOR POWER INVERTER (MPI) MODULE FAN TEST ) and MPI module fan duct line.

    Are the MPI module fan and MPI fan duct line OK? 

    1. YES  - Replace the voltage converter module and the MPI module (see POWER CONTROL UNIT (PCU) DISASSEMBLY/REASSEMBLY ).
    2. NO  - Replace the MPI module fan (see POWER CONTROL UNIT (PCU) REMOVAL/INSTALLATION ) and/or repair the MPI fan duct line.
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