0725756ec17787ee998fd5670380bfaa96be5438b1254853cfcad0955d867253

nsxb23324a.pdf

Security Alarm System
Indicator Replacement
1. Remove the door panel (see section 20).
2. Remove the two screws from the indicator.
3. Remove the indicator from the door panel.
5-P CONNECTOR INDICATOR
DOOR PANEL
Trunk Key Cylinder Switch Test
1. Open the trunk lid and remove the trunk rear panel.
2. Disconnect the 2-P connector from the trunk key
cylinder switch.
3. Check continuity at the switch connector terminals.
• There should be continuity between the terminals
when the trunk lock is turned to UNLOCK with
the key.
• There should be no continuity when the lock is
released.
TRUNK KEY
CYLINDER SWITCH
2-P
CONNECTOR
TRUNK KEY
CYLINDER

Attachments

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nsxb23309a.pdf

A/T Gear Position Switch Test
1. Remove the front console, then disconnect the
12-P connector from the A/T gear position switch.
2. Check for continuity between the terminals in each
switch position according to the table.
• Move the lever back and forth at each position
without touching the push button, and check for
continuity within the range of free play of the
shift lever.
• If there is no continuity within the range of free
play, adjust the position of the A/T gear position
switch (see page 23-160).
A/T GEAR POSITION SWITCH
12-P CONNECTOR
View from wire side.
A/T Gear Position Switch (For cruise control)

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nsxd23277a.pdf

Switch Removal
CAUTION:
All SRS wiring harnesses are covered with yellow
outer insulation.
Before disconnecting any part of the SRS wire
harness, install the short connectors (see page
24-10(’93-’96)).
Replace the entire affected SRS harness assembly if
it has an open circuit or damaged wiring.
1. Remove the dashboard tower cover and disconnect
the connectors from the floor wire harness.
CONNECTORS
FOOT WELL LIGHT
LIGHTS-ON
CHIME
DASHBOARD
LOWER COVER
2. Disconnect the 18-P connector from the floor wire
harness.
CAUTION: Be careful not to damage the SRS wire
harness.
BEAR WINDOW
DEFOGGER SWITCH
18-P
CONNECTOR
3. Remove the tilt cover.
TILT COVER
4. Remove the steering column lower cover and upper
cover.
UPPER COVER
LOWER COVER
NOTE: Be careful not to damage the steering column
covers.
5. Remove the four screws, then remove the rear win-
dow defogger switch and windshield wiper/washer
switch assembly.
REAR WINDOW
DEFOGGER
SWITCH
WINDSHIELD WIPER/WASHER
SWITCH

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8facacb0ad0308913d56fc2e78bcb827f08b8925ac8ca090feb9df3481520ff8

nsxe23112a.pdf

Radiator and Condenser Fan Controls
Description
Fan control system:
The cooling fan system is comprised of radiator fan, condenser fan (left, right), engine compartment fan, radiator fan
low relay, radiator fan high relay, condenser fan relay, engine room fan relay, radiator fan resistor, coolant temperature
sensor, A/C pressure switch, cooling fan control unit, climate control unit, and PGM-FI ECU.
The fan control unit controls the operation of the radiator fan and condenser fan.
It uses inputs from the coolant temperature sensor and A/C pressure switch (A and B) on the A/C system to determine
when the fans should run and at what speed.
Additionally, the temperature switch shuts down the A/C system if the coolant temperature exceeds 130°C (266°F).
If the pressure in the A/C system is higher than normal, pressure switch A closes and the fans will run at high speed only.
See the A/C section for description and specification of that funciton.
Fans operating condition:

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nsxb23114a.pdf

Radiator and Condenser Fan Controls
Description
Fan control system:
The cooling fan system is comprised of the radiator fan, condenser fan (left and right), engine compartment fan, radiator
fan low relay, radiator fan high relay, condenser fan relay, engine compartment fan relay, radiator fan resistor, radiator
fan control sensor, A/C pressure switch, fan control unit, climate control unit, and ECM.
The fan control unit controls the operation of the radiator fan and condenser fans.
It uses inputs from the radiator fan control sensor and the A/C pressure switches (A and B) in the A/C system to deter-
mine when the fans should run and at what speed.
Additionally, the temperature switch shuts down the A/C system if the engine coolant temperature (ECT) exceeds
266°F (130°C). If the pressure in the A/C system is higher than normal, pressure switch A closes and the fans will run at
high speed only. See the A/C section for the description and specifications of that function.

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nsxe23174a.pdf

Lighting System
Lighting Switch Replacement
CAUTION:
All SRS electrical wiring harnesses are covered with
yellow outer insulation.
Before disconnecting the SRS wire harness, install
the short connector on the airbag (see page 23-323).
Replace the entire affected SRS harness assembly
if it has an open circuit or damaged wiring.
1. Remove the dashboard lower cover and disconnect
the 2-P connectors from the floor wire harness.
2-P
CONNECTORS DASHBOARD
LOWER COVER
2. Remove the dashboard center panel.
DASHBOARD CENTER
PANEL
3. Remove the tilt cover.
TILT COVER
4. Remove the steering column lower cover and upper
cover.
5. Disconnect the 16-P connector and 10-P connector.
10-P
CONNECTOR
16-P CONNECTOR

6. Remove the 4 screws from the lighting switch.
7. Disconnect the 10-P connector from the cancel unit,
then remove the lighting switch.
Lighting Switch Light Bulb Replacement
1. Remove the steering column covers.
2. Remove the 2 screws.
3. Slide the lighting switch out of the housing as shown.
4. Remove the bulb from the lighting switch by turning
the bulb 45°.
BULB (0.91 W)
HOUSING
LIGHTING SWITCH
10-P CONNECTOR
16-P CONNECTOR CANSEL SWITCH
8. If necessary, remove the cancel unit and cancel switch.
TURN SIGNAL
CANCEL UNIT
TURN SIGNAL
CANCEL SWITCH
LIGHTING SWITCH

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74aad5530f774eb901d9e03987f5281b31d49151a5d9687add39958565eb7afa

nsxb23145a.pdf

Safety Indicator
Component Location index
SRS components are located in this area. Review the SRS
component locations, precautions, and procedures in the
SRS section (24) before performing repairs or service.
SAFETY INDICATOR (In the gauge assembly)
Removal, page 23-129 (’93-’96) (’91-’92)
Troubleshooting, page 23-152 (’94-’96) (’91-’93)
Input Test, page 23-150 (’94-’96) (’93) (’91-’92)
CEILING LIGHT
Test, page 23-201
ROOF LOCK SWITCH ( * 1)
Test, page 23-154 (’94-’96) (’91-’93)
PASSENGER’S DOOR SWITCH
Test, page 23-204
HIGH MOUNT BRAKE LIGHT
Test, page 23-211
BRAKE SWITCH
Test, page 23-211
DRIVER’S DOOR SWITCH
Test, page 23-204
ROOF HOLDER SWITCH (* 1)
Test, page 23-155 (’94-’96) (’91-’93)
ENGINE COMPARTMENT LID SWITCH
Test, page 23-325 (’93-’96) (’91-’92)
LEFT BRAKE LIGHT
FAILURE SENSOR
Test, page 23-153
TRUNK LATCH SWITCH
Test, page 23-205
RIGHT BRAKE LIGHT
FAILURE SENSOR
Test, page 23-153
*1: NSX-T (open top) only
Description
Safety Indicator System:
LED’s are used to indicate when the trunk lid, engine compartment lid, a door, or the roof is not latched, or when a brake
light is faulty, or when the roof is not stored or improperly stored in its holder. The LED’s will go on and stay on for about
two seconds after the ignition switch has been turned ON, to show that the system circuit is functioning.
Brake Light Bulb Failure Indicator:
If all brake light bulbs are OK, the indicator light stays off because the ORN/WHT wire is grounded by the two brake light
failure sensors connected in series. With the brake lights off, the ground is provided through the diode, the failure sensor
relay coil, and bulb filaments. With the brake light on, all four relays (two in the left sensor, two in the right sensor), con-
nected in series, supply ground. If any of the four bulbs is not working, the chain is broken and the ORN/WHT wire is not
longer grounded. The indicator light comes on.

Attachments

eaba0d5a4d9ba27ca68c0b5964bb8ffc7f605da8bd3b56ebb1573baf32fa6e97

nsxb23182a.pdf

Lighting System
Headlight/Turn Signal Switch Replacement
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section 24 before performing repairs or ser-
vice.
1. Remove the dashboard lower cover, and disconnect
the connectors.
2. Remove the dashboard lower pad.
DASHBOARD LOWER
COVER
DASHBOARD LOWER
PAD
3. Remove the tilt cover.
TILT COVER
4. Remove the steering column covers.
NOTE: Be careful not to damage the steering col-
umn covers.
UPPER COVER
LOWER COVER

5. Disconnect the 18-P and 10-P connectors.
CAUTION: Be careful not to damage the SRS wire
harness.
6. Remove the six screws, then remove the headlight-
turn signal switch assembly.
HEADLIGHT SWITCH
10-P CONNECTOR
18-P CONNECTOR
TURN SIGNAL SWITCH
7. If necessary, remove the turn signal cancel unit and
cancel switch.
TURN SIGNAL
CANCEL UNIT
TURN SIGNAL
CANCEL SWITCH
8. If necessary, remove the headlight switch bulb.
HEADLIGHT SWITCH
BULB (0.91 W)

Attachments

436be05aa812812d9e5ee70f2f1c947637c5b9c86bfacb1bac51696e31f66b84

nsxb23087a.pdf

Overrunning Clutch Inspection
1. Check if the overrunning clutch moves along the
shaft freely. If not, replace the overrunning clutch
assembly.
2. Check if the overrunning clutch locks in one direc-
tion and rotates smoothly in reverse. If it does not
lock in either direction or it locks in both directions,
replace the overrunning clutch assembly.
3. Check if the starter drive gear is worn or damaged.
If the gear is worn or damaged, replace the over-
running clutch assembly; the gear is not available
separately.
NOTE: Check the condition of the flywheel or tor-
que converter ring gear if the starter drive gear
teeth are damaged.
Starter Reassembly
Reassemble the starter in the reverse order of
disassembly.
1. Pry back each brush spring with a screwdriver,
then position the brush about halfway out of its
holder, and release the spring to hold it there.
2. Install the armature in the housing. Next pry back
each brush spring again, and push the brush down
until it seats against the commutator. Then release
the spring against the end of the brush.
3. Install the end cover on the brush holder.
END COVER
BRUSH HOLDER
O-RING

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