Service Precautions - IMA System

Service Precautions

IMA System
- The IMA (Integrated Motor Assisted) system uses high voltage (144 V) circuits. Be sure to shut off the electrical circuits and isolate the IMA system and related parts before servicing the IMA system.

- The high voltage cables and their covers are orange. The caution labels are attached to high voltage and other related parts. Be careful not to touch these cables and parts without adequate protective gear.
The front floor under-cover, protecting the high voltage cables, is marked.

- If the 12 V battery has been discharged, its cable has been disconnected, or the MCM (Motor Control Module) has been reset, the IMA battery level indicator (BAT) on the gauge will not indicate the state of charge when the engine is started.
Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the indicator shows at least three segments.

- Observe the following instructions when inspecting or servicing the IMA system.
- Always remove the ignition key front the key cylinder
- When the IMA system indicator is on, perform the IMA system troubleshooting first.
- Wear insulated gloves whenever you inspect or service the IMA system. Be sure to check the gloves for pin holes, tears, or other damage.
- Turn the battery module switch OFF, and secure the switch in the OFF position with the locking cover before servicing the IMA system.
- Wait for 5 or more minutes after turning off the battery module switch, then disconnect the negative cable from the 12 V battery (it takes about 5 minutes for the PDU capacitor to discharge).
- Before disconnecting the high voltage cable terminals, make sure that the voltage between the terminals is below 30 V when measured with a voltmeter.
- When servicing the parts without the insulating sheath, be sure to use the insulated tools to prevent short circuiting.
- The rotor assembly contains very strong magnets and should be handled with special care. People with pacemakers or other magnetically sensitive medical devices should not handle the rotor assembly.
- Use the special tool to remove or install the rotor assembly.

WARNING: If the rotor is installed by hand, it may suddenly be pulled toward the stator with great force causing serious hand or finger injury. Always use the special tool to remove or install a rotor assembly.

- Keep the rotor assembly away from magnetically sensitive devices, such as credit cards or identification badges.
- After disconnecting the high voltage terminals, busbars, etc., insulate the parts with insulated tape.
- As a safety warning, attach a sign saying, "WORKING ON HIGH VOLTAGE PARTS. DO NOT TOUCH:" to the steering wheel.