2013 INFINITI M HYBRID cooling

2. Basic High Voltage Information
2-1
Battery Information
The M35h HYBRID utilizes two batteries in order to supply both high and low voltage.
2-1.1 12V Battery • The M35h HYBRID contains a conventional lead-acid 12Vbattery.
• The 12V battery is located in the trunk, left of Li-ion battery, concealed by trim cover.
• The 12V battery is charged by the Li-ion battery through the DC/DC converter.
2-1.2 Li-ion Battery • The M35h HYBRID contains a Li-ion high voltage battery.
• The high voltage battery is mounted in the trunk areabehind the rear seat, enclosed in a metal case and
concealed by trim cover.
• The high voltage battery stores approximately 346 volts DC (400V max.) .
• The high voltage battery exhausts gases directly outside the vehicle through a vent hose.
• An air vent is located on the rear parcel shelf for battery cooling.
The high voltage battery supplies power to the following: • High voltage harnesses
• DC/DC converter
• Traction motor inverter
• Traction motor
• Electric air conditioner compressor AAYIA0064ZZ
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4. Jump Starting
T
o start the hybrid system with a booster battery, the instructions and precautions below must be followed. If done incorrectly, jump starting can lead to a 12V battery explosion, resulting in severe
personal

injury or death. It could also damage your vehicle.
Jump starting provides power to the 12V system to allow the electrical systems to operate. The electrical
systems must be operating to allow the Li-ion battery to be charged. Jump starting does not charge the
Li-ion battery.
Discharged 12V battery may cause the following issues: • The instrument cluster cannot be displayed while the ignition switch is turned ON. (The hybridsystem cannot start.)
• Headlamps, horn, etc. are weak. • To avoid electrical shock, the high voltage Li-ion battery CANNOT be jump started.
•

Explosive hydrogen gas is always present in the vicinity of the 12V battery. Keep all
sparks and flames away from the 12V battery.
• Do not allow battery fluid to come into contact with eyes, skin, clothing or painted surfaces. Battery fluid is a corrosive sulfuric acid solution that can cause severe burns. If
the fluid comes into contact with anything, immediately flush the contacted area with
water.
• The booster battery must be rated at 12 volts. Use of an improperly rated battery can damage the vehicle.
• Whenever working on or near a 12V battery, always wear suitable eye protectors (for example, goggles or industrial safety spectacles) and remove rings, metal bands, or any
other jewelry. Do not lean over the 12V battery when jump starting.
• Do not attempt to jump start a frozen battery. It could explode and cause serious injury.
• M35h HYBRID is equipped with an automatic cooling fan. It could come on at any time. Keep hands and other objects away from it.
• Always follow the jump starting instructions below. Failure to do so could result in damage to the DC/DC converter and cause personal injury.
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6-3 Lithium-ion (Li-ion) Battery Pack Removal
6-3.1
Exploded View
1. Battery inlet duct A 2. Li-ion battery assembly 3. DC/DC converter outlet duct
4. Battery outlet duct B 5. Battery outlet duct A6. Battery inlet duct B
7. Battery cooling fan 8. DC/DC converter inlet duct
6-3.2 Removal Procedure 1. Remove the service plug. Refer to Alternate Procedure 2.
2.

Insert an appropriate tool into the gap between the trunk lamp case and front trunk trim panel to
remove the trunk lamp case.
3. Disconnect the trunk lamp harness connector.
4. Remove the trunk lid weather strip.
5. Remove the front trunk trim retainer clips. AAYIA0036ZZ
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19. Disconnect the Li-ion battery cooling fan motor harness connector.
20.
Release the two rear seat cushion retainers.
21. Lift up and pull out the rear seat cushion (1) and then remove the rear seat back nuts (3) . Lift up the rear seat back (2) and remove it. AAYIA0044ZZ
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• Be careful that the engine crane does not contact
the trunk lid.
• Apply protection so that no scratches or other damage occurs on the vehicle body or trunk lid.
29. Remove the DC/DC converter inlet duct clips (A) and then the DC/DC converter inlet duct (1) . Touching high voltage components without wearing
appropriate

PPE will cause electrocution.
30. Remove the battery cooling fan mounting bolts (A) and remove the battery cooling fan (1) . Touching high voltage components without wearing
appropriate

PPE will cause electrocution. JSCIA0282ZZ
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