DC-DC Converter Removal/Installation

WARNING: The IMA motor power cables carry high voltage when the engine is running or the IMA system is energized. To avoid serious injury from electrical shock, do not start the engine with the IMA motor power cables disconnected.

IMA components are located in this area. The IMA is a high-voltage system. You must be familiar with the IMA system before working on or around it. Make sure you have read the IMA service precautions before doing repairs or service (see SERVICE PRECAUTIONS ).

Make sure the ignition switch is in LOCK (0).
Do the 12 volt battery terminal disconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
Remove the MCM (see IPU CASE REMOVAL/INSTALLATION ).
Disconnect the four IMA motor power cables (A) from the phase motor current sensor, then wrap the end of the 12 volt power cable (B) with insulating tape.
NOTE: Check the position of the U phase, the V phase, and the W phase cables before disconnecting them.

Fig 1: IMA Motor Power Cables Of Phase Motor Current Sensor And Insulating Tape With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the bolts (A) and the terminal cover (B).

Fig 2: Terminal Cover And Bolts With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the DC-DC converter connector (A).

Fig 3: DC-DC Converter Connector Replacement Components With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the bolt (B) and the busbar (C).
Remove the bolts (D, E) and the DC-DC converter (F).
Install the parts in the reverse order of removal.
NOTE: Make sure the IMA motor power cables are correctly positioned before you reconnect them.
Do the 12 volt battery terminal reconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).