1991 ACURA NSX battery replacement

Air Mix Control Motor


Replacement

1. Disconnect the heater valve cable from the air mix control motor.

HEATER VALVE
CABLE

AIR MIX CONTROL

MOTOR

2. Remove the three screws and the air mix control
motor.

AIR MIX CONTROL

MOTOR

3. Install the air mix centrol motor in the reverse order of removal, then apply battery voltage (see page

22-57) and watch the door move.

Make sure that the air mix door moves smoothly

without binding.

Make sure the motor doesn't pull the air mix

door too far.
4. If necessary, to adjust the heater valve cable:
Set the air mix control motor at COOL position

(see page 22-57) with the cable disconnected

at the valve.
Hold the end of the cable housing against the
stop on the cable. Then snap the clamp down

ove
r
the housing.

After adjusting the cable, make sure that the air
mix control motor still moves smoothly without

binding.

STOP

CLAMP

HEATER VALVE

CABLE
AIR MIX CONTROLMOTOR
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Test

1. Connect battery power to the No. 1 terminal of the air mix control motor, then connect ground to the
No. 2 terminal; the air mix control motor should
run, and stop at HOT,
If it doesn't, reverse the connections; the air mix
control motor should run, and stop at COOL.
NOTE: If the air mix control motor does not run,
remove it, and check the air mix control linkage and
doors for smooth movement. If the air mix control
linkage and doors move smoothly, replace the air

mix control motor.

2. Measure resistance between the No. 3 terminal and No. 5 terminal; it should be approx. 10 k. 3. • Measure resistance between the No. 3 terminal and
No. 4 terminal; if should be approx. 0.6 k
at COOL

and approx. 9.4 k at HOT.
Mode Control Motor

Replacement

1. Remove the three screws and mode control motor.

MODE CONTROL

MOTOR

2. Install the mode control motor in the reverse order of removal. Then apply battery voltage (see page
22-58) and watch the doors
move.

Make sura that the HEAT and DEF doors moves

smoothly without binding.

Make sure the motor doesn't pull the HEAT and
DEF doors too far.ProCarManuals.com

Blower Unit

Replacement

1. Remove the spare tire (refer to Owner's manual).

2. Remove the spare tire holder.

CORROSION RESISTANT BOLT

6 x 1.0 mm

10 N-m (1.0 kg-m, 7 Ib-ft)

SPARE TIRE

HOLDER

3. Disconnect the cables from the battery, loosen the

hold-down bracket nuts, and remove the hold-

down bracket. Then, remove the battery.

BATTERY

HOLD-DOWN

BRACKET
4. Remove the under-hood relay box A and the water

drain duct. Disconnect the connectors from the

blower motor, power transistor and recirculation

control motor.

CORROSION RESISTANT BOLT

6 x 1.0 mm

10 N-m (1.0 kg-m, 7 Ib-ft)

WATER

DRAIN

DUCT

BLOWER MOTOR,

POWER TRANSISTOR,

and RECIRCULATION CONTROL

MOTOR CONNECTORS 6 x 1.0 mm

10 N-m (1.0 kg-m, 7 Ib-ft)

5. Remove the mounting bolts, then remove the blower

unit.

CORROSION RESISTANT BOLT

BLOWER

UNIT

6 x 1.0 mm

10 N-m (1.0 kg-m, 7 Ib-ft)

6. Install the blower unit in the reverse order of

removal, then make sure it runs and doesn't leak

any
air.
UNDER-HOOD

RELAY

BOX AProCarManuals.com

Replacement
1. Disconnect the negative cable from the battery.
2. Remove the from bumper (see section 20).
3. Recover the refrigerant using a R-134a refrigerant Recover/Recycling/Charging System (see page

22-73).

4. Disconnect the discharge line C and the condenser lines from the condenser. Cap the open fittings

immediately to keep moisture and dirt out of the

system.

(Right Condenser)

CONDENSER
LINE A
DISCHARGE
LINE C

(Left Condenser)

CONDENSER
LINE C
CONDENSER
LINE A
5. Disconnect the connector from the condenser fan,
remove the two mounting bolts and nut, then
remove the condenser.

*: CORROSION RESISTANT BOLT

(Right Condenser)

NUT

CONNECTOR
RIGHT CONDENSER

* MOUNTING BOLTS
6 x 1,0 mm
10 N·m (1.0 kg-m, 7 Ib-ft)

(Left Condenser)
CONNECTOR
NUT

LEFT CONDENSER * MOUNTING BOLTS
6 x 1.0 mm
10 N·m (1.0 kg-m. 7 Ib-ft)
6. Install the condenser in the reverse order of removal; and:
If you're installing a new condenser, add
refrigerant oil (ND-OIL 8) (see page 22-69 ).
Replace 0-rings with new ones at each fitting,
and apply refrigerant oil to them.
NOTE: Be sure to use the right O-rings for
R-134a to avoid leakage. Charge the system (see page 22-91) and test its
performance (see page 22-70).
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Replacement
1. I f th e compresso r stil l works , ru n th e engin e a t idl e
for a fe w minute s wit h th e A/ C on , the n shu t th e
engin e of f an d disconnec t th e negativ e cabl e fro m
th e battery .
2 . Recove r th e refrigeran t usin g a R-134 a refrigeran t
Recovery/Recycling/Chargin g System . (se e pag e
22-73 ).
3 . Disconnec t th e compresso r connector .
COMPRESSO RCONNECTOR
4. Rais e th e ca r o n a hoist . Mak e sur e it' s properl y
supporte d (se e sectio n 1 ).
5 . Remov e th e fron t bea m (se e sectio n 5 ).
6 . Disconnec t th e suctio n an d discharg e hose s fro m th e
compressor . Ca p th e ope n fitting s immediatel y t o
kee p moistur e an d dir t ou t o f th e system .
DISCHARG E HOS E
SUCTIO NHOSE
8 x 1.2 5 mm30 N- m(3.0 kg-m ,22 Ib-ft )
7. Loose n th e idle r pulle y cente r nu t an d adjustin g bolt ,
the n remov e th e bel t fro m compressor .
ADJUSTING BOL T12 N- m (1. 2 kg-m ,9 Ib-ft )
IDLE R PULLE Y CENTE R
NUT45 N- m (4. 5 kg-m ,33 Ib-ft )
8. Remov e th e fou r mountin g bolt s an d compressor .
COMPRESSO R
MOUNTING BOLT S
8 x 1.2 5 mm25 N- m (2. 5 kg-m ,18 Ib-ft )
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Starter Solenoid Test

1. Check the hold-in coil for continuity between the S

terminal and the armature housing (ground).

The coil is OK if there is continuity.

ARMATURE HOUSING

(GROUND)

PULL - IN COIL HOLD - IN COIL

2. Check the pull-in coil for continuity between the S

and M terminals.

The coil is OK if there is continuity.
Starter Replacement

1. Disconnect the battery negative cable.

2. Remove the engine wire harness from the harness

clip on the starter motor.

3. Disconnect the starter cable and the BLK/WHT

wire.

4. Remove the two bolts holding the starter, and

remove the starter.

UPPER MOUNTING BOLT

75 N-m (7.5 kg-m, 54 Ib-ft)

B-TERMINAL MOUNTING NUT

9 N-m (0.9 kg-m. 6.5 Ib-ft)

STARTER CABLE

LOWER MOUNTING BOLT

75 N-m (7.5 kg-m, 54 Ib-ft)
BLK/WHT WIREProCarManuals.com

Interlock System

Shift Lock Solenoid Test/Replacement

Test:

1. Remove the console, then disconnect the 3-P con-

nector of the shift lock solenoid from the floor wire

harness.

NOTE: This solenoid has a diode in it. To get an

accurate reading, either test it with a volt-ohmmeter

that compensates for diodes, or make sure you con-

nect your test leads to match the polarity shown.

2. Connect battery power to the A terminal and

ground to the B terminal momentarily, and check to

see if the solenoid works.

View from wire side

SHIFT LOCK

SOLENOID

• If it does not work, replace it.

• If it works, go to step 3.

3. When the shift lock solenoid is ON, check that there

is a clearance of 2.5 ± 0.5 mm (0.098 ± 0.020 in)

between the top corner of the shift lock lever and

the side of the lock pin.

• If clearance is correct, go to next step.

• If clearance is incorrect, loosen the self-locking

nuts and adjust the solenoid as needed.
4. When the shift lock solenoid is OFF, make sure that

the lock pin is blocked by the top of the shift lock lever.

LOCK PIN

SHIFT LOCK

LEVER

If it is not blocked, adjust the position of the shift

lock solenoid as needed to block it.

Replacement:

1. Remove the E ring and the solenoid pin.

SOLENOID PIN

E RING SELF-LOCKING NUTS

Replace

10 N-m
(1.0 kg-m,

7.2 Ib-ft)

2. Remove the self-looking nuts and shift lock

solenoid.

3. Install the new shift lock solenoid in the reverse

order of removal.

4. Check the position of the shift lock solenoid as

described in steps 3 and 4.
LOCK PIN
2.5 ± 0.5 mm

(0.098 ± 0.020 in)
SHIFT LOCK

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Trunk Opener

Opener Switch Test

1. Remove the driver's door panel, then push the switch

out of the door panel as shown.

2. Check for continuity between the terminals.

• There should be continuity between the A and B

terminals when the switch is pushed.

• There should be no continuity when the switch

is released.
Solenoid Test/Replacement

1. Open the trunk lid, and remove the trunk side trim

panel.

2. Disconnect the 2-P connector from the solenoid

assembly, and test solenoid operation by connec-

ting battery power and ground to the A and B ter-

minals momentarily.

SOLENOID

ASSEMBLY

TRUNK LATCH

TRUNK OPENER

CABLE
BRACKET

BOLT

3. To remove the solenoid, remove the two bolts, then

disconnect the trunk opener cable from the

solenoid assembly.

OPENER CABLE

SOLENOID

ASSEMBLY

4. Install in the reverse order of removal.
BRACKET
View from

terminal side

DOOR

PANELProCarManuals.com