MACS Monthly Newsletter - 2022 - APR6

Figure 7: 2008 Toyota Prius battery cooling circuit. Lt GRN=12v from relay.
blower motors we are familiar with. Air from the fan
is discharged into duct " C " where it is directed into
the top chamber of the HV Battery module. There is
a space or " chamber " across the top of all the battery
blades, and the cooling air is distributed across
the top of the battery pack. Figure 6 shows the battery
pack end view where the ducts are inserted.
Air flows in the top, downward through the space
between the batteries where heat is transferred to
the air. Warm air exits at the bottom and flows into
the discharge duct " E " (Figure 5) where it exits the
cabin through a modified cab/body vent behind the
12-volt battery.
Component " D " is the relay for the battery cooling
fan.
Component " ** " is the battery blower controller,
mounted in the duct similar to a blower resistor and
controlled by the Hybrid Battery ECM (inside the HV
Battery Case). Figure 7 shows the control circuit for
the HV Battery Cooling System. Circuit #1 carries
April 2022
6
the 12-volt supply from the Hybrid Battery Fan Relay,
which is also controlled by the Hybrid Battery ECM.
Bi-directional scan tool controls can be used to
confirm operation of air-cooling system on most Hybrid
vehicles.
Battey Over Temperature codes are becoming
more popular as these vehicles age. Sometimes
these codes are caused by the driver, other times a
failure is present.
A true " hyper-miler, " yes, they do exist, may refuse
to use the A/C to achieve the maximum possible fuel
economy. In rare cases of extreme ambient heat,
combined with blacktop and stuck in gridlock, the
air available to the Hybrid Battery Cooling System
may be too hot to provide adequate cooling of the
HV Battery. In this case the technician may test the
system and find it functioning properly. In this situation,
it helps to speak with the customer to learn the
exact operating conditions present when the code
was set. Educating the customer to use the A/C to
MACS Service Reports
Mitchell Pro-Demand

MACS Monthly Newsletter - 2022

Table of Contents for the Digital Edition of MACS Monthly Newsletter - 2022

MACS Monthly Newsletter - 2022 - JAN1
MACS Monthly Newsletter - 2022 - JAN2
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MACS Monthly Newsletter - 2022 - JAN6
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MACS Monthly Newsletter - 2022 - MAR1
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MACS Monthly Newsletter - 2022 - MAR6
MACS Monthly Newsletter - 2022 - MAR7
MACS Monthly Newsletter - 2022 - MAR8
MACS Monthly Newsletter - 2022 - APR1
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MACS Monthly Newsletter - 2022 - APR3
MACS Monthly Newsletter - 2022 - APR4
MACS Monthly Newsletter - 2022 - APR5
MACS Monthly Newsletter - 2022 - APR6
MACS Monthly Newsletter - 2022 - APR7
MACS Monthly Newsletter - 2022 - APR8
MACS Monthly Newsletter - 2022 - MAY1
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MACS Monthly Newsletter - 2022 - MAY5
MACS Monthly Newsletter - 2022 - MAY6
MACS Monthly Newsletter - 2022 - MAY7
MACS Monthly Newsletter - 2022 - MAY8
MACS Monthly Newsletter - 2022 - JUN1
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MACS Monthly Newsletter - 2022 - JUN3
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MACS Monthly Newsletter - 2022 - JUN5
MACS Monthly Newsletter - 2022 - JUN6
MACS Monthly Newsletter - 2022 - JUN7
MACS Monthly Newsletter - 2022 - JUN8
MACS Monthly Newsletter - 2022 - AUG1
MACS Monthly Newsletter - 2022 - AUG2
MACS Monthly Newsletter - 2022 - AUG3
MACS Monthly Newsletter - 2022 - AUG4
MACS Monthly Newsletter - 2022 - AUG5
MACS Monthly Newsletter - 2022 - AUG6
MACS Monthly Newsletter - 2022 - AUG7
MACS Monthly Newsletter - 2022 - AUG8
MACS Monthly Newsletter - 2022 - SEP1
MACS Monthly Newsletter - 2022 - SEP2
MACS Monthly Newsletter - 2022 - SEP3
MACS Monthly Newsletter - 2022 - SEP4
MACS Monthly Newsletter - 2022 - SEP5
MACS Monthly Newsletter - 2022 - SEP6
MACS Monthly Newsletter - 2022 - SEP7
MACS Monthly Newsletter - 2022 - SEP8
MACS Monthly Newsletter - 2022 - OCT1
MACS Monthly Newsletter - 2022 - OCT2
MACS Monthly Newsletter - 2022 - OCT3
MACS Monthly Newsletter - 2022 - OCT4
MACS Monthly Newsletter - 2022 - OCT5
MACS Monthly Newsletter - 2022 - OCT6
MACS Monthly Newsletter - 2022 - OCT7
MACS Monthly Newsletter - 2022 - OCT8
MACS Monthly Newsletter - 2022 - DEC1
MACS Monthly Newsletter - 2022 - DEC2
MACS Monthly Newsletter - 2022 - DEC3
MACS Monthly Newsletter - 2022 - DEC4
MACS Monthly Newsletter - 2022 - DEC5
MACS Monthly Newsletter - 2022 - DEC6
MACS Monthly Newsletter - 2022 - DEC7
MACS Monthly Newsletter - 2022 - DEC8
https://www.nxtbook.com/nxtbooks/macs/servicereports_2022
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https://www.nxtbook.com/nxtbooks/macs/servicereports_2020
https://www.nxtbook.com/nxtbooks/macs/servicereports_2019
https://www.nxtbook.com/nxtbooks/macs/servicereports_2018
https://www.nxtbook.com/nxtbooks/macs/servicereports_2017
https://www.nxtbook.com/nxtbooks/macs/servicereports_2016
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