Electric Drive Systems: Description and Operation
Electric Powertrain System
General Information
Electric powertrain system uses up to approx. 320 V high voltage circuits and an organic solution (lithium-ion) contained battery module.
Improper handling may cause serious injury such as electrocution. When working on or around the electric powertrain system pay attention to the following precautions.
Preparation Items
^ Protective items (insulated gloves or rubber gloves, protective goggles, protective shoes)
^ ABC fire extinguisher (available for both oil fires and electric fires)
^ Shop towels (for wiping off the electrolyte)
^ Insulating tape
Precautions when Working on High Voltage Area
CAUTION
Be careful not to let the electrolyte get into your eyes or contact your skin. Doing so may cause loss of your eyesight or skin damage. If it electrolyte gets into your eyes or comes into contact with your skin, immediately flush with a large amount of water and seek medical attention.
^ Wear insulated gloves or rubber gloves, protective goggles, and protective shoes whenever you inspect or service the electric powertrain system.
^ Check the gloves for pin holes, tears, or other damage.
^ As a safety warning, attach a sign saying, WORKING ON HIGH VOLTAGE PARTS. DO NOT TOUCH! to the steering wheel.
^ The high voltage cables and their covers are identified by orange coloring. The caution labels are attached to high voltage and other related parts. When the system is energized, be careful not to touch these cables and parts without adequate protective gear.
^ Be sure to shut off the electrical circuits and isolate the electric powertrain system and related parts before servicing the electric powertrain system. (See Turning Off and ON Power to the High Voltage Circuit below)
^ Always use insulated tools when servicing, disassembling, or replacing items marked with in each procedure even if the main switch is OFF.
^ Do not disassemble the battery module when doing the repair or replacement procedure.
^ After disconnecting the high voltage terminals, busbars, etc., insulate the parts with insulating tape.
^ Do not touch bare wires that could carry a high voltage. If you must touch them, put on insulated gloves, and measure the voltage between the body ground. If the voltage is above the 12 volt battery voltage, insulate the part with insulating tape before doing any operation since to prevent shorting the battery module (up to approx. 320 V).
^ When insulating a high voltage area with insulating tape, be sure to cover it thoroughly.
^ Check around the battery module for leaks of the organic solution. If you find a leak, avoid touching it, but if you must touch it, put on rubber gloves and protective goggles.
^ Keep sparks and flames away from the battery module, since the organic solution is flammable.
^ Seal the replaced battery module in a P.P. (Polypropylene) bag, and keep it in a well-ventilated area away from sparks and flames.
Collision Shutoff History Clear Command
When the battery condition monitor module receives a collision detection signal (COS) from the SRS unit the battery condition monitor module updates the collision shutoff history and stores it in the nonvolatile memory located inside the module. The battery condition module monitor stops supplying power to the high-voltage circuits disrupting the control signal to be sent to the high-voltage contactor inside the battery module the next time the system is being turned on. To resume power supply to the high-voltage circuits the collision shutoff history needs to be cleared. Do the following procedures to clear the collision shutoff history.
1. Inspect the battery module for exterior damage or leaks. If any damage or leaks are found contact American Honda Motor Co. (AHM) 800-999-i 009. If no damage is found go to step 2.
2. Check the battery high voltage wires (orange coated) for damage. If any damage is found replace the damaged wire harness or component then go to step 3.
3. Connect the HOS to the data link connector (DLC) (A) located under the drivers side of the dashboard.
4. Turn the vehicle to the ON mode.
5. Make sure the HOS communicates with the battery condition monitor module. If it doesn't go to the DLC circuit troubleshooting; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
6. Select the ELECTRIC POWERTRAIN/IMA system with the HOS.
7. Select the INSPECTION MENU with the HOS.
8. Select the COLLISION SHUTOFF HISTORY CLEAR and follow the screen prompts.
Other Precautions
^ High temperature may damage the battery module. When drying paint in a heated paint booth, make sure the temperature does not exceed 150 °F (65 °C).
Turning Off and On Power to the High Voltage Circuit
The following procedure should be done before you work on or near any energized high voltage components. Follow the procedure exactly.
Otherwise you may be injured or may damage equipment.
Turning Off the Main Switch
1. Connect the HOS to the data link connector (DLC) (A) located under the drivers side of the dashboard.
2. Turn the vehicle to the ON mode.
3. Make sure the HDS communicates with the motor control module. If it doesn't go to the DLC circuit troubleshooting; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
4. Check the diagnostic trouble code (DTC) and note it if any DTCs is stored.
5. Turn the vehicle to the OFF (LOCK) mode.
6. Do the 12 volt battery terminal disconnection procedure
7. Disconnect the telematics control unit connector; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
8. Remove the rear seat-back; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
9. Remove the main switch lid cover (A).
10. Turn the main switch (A) OFF then check that the OFF switch knob position is showing.
11. Remove the main switch lid (A).
12. Remove the rear bulkhead gusset (A).
13. Measure the voltage between the battery module terminals through the junction board covers holes (A). There should be less than 30 V.
Turning On the Main Switch
1. If needed after service or repairs are completed then install the rear bulkhead gusset (A).
2. If needed install the main switch lid (A).
3. Push the button (A) and turn the main switch ON (B).
4. Install the main switch lid cover (A).
NOTE: If the main switch is not turning on the lid cannot be installed.
5. Install the rear seat-back; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
6. Connect the telematics control unit connector; refer to the appropriate Accord Plug In Hybrid Electric Vehicle (PHEV) Service Manual.
7. Do the 12 volt battery terminal reconnection procedure
Disconnecting and Reconnecting the Connector Lever-Locked Connector
1. Raise the lever (A) while pushing the tab (B) in the direction of the arrow.
Slider-Locked Connector
1. Move the slider (A) in the direction of the arrow then disconnect the connector (B) while pushing the tab (C).
