1991 ACURA NSX brake sensor

Description
Electronic Control System (cont'd)
TRANSMISSION CONTROL MODULE (TCM)

ENGINE
CONTROL
MODULE
(ECM) Shift Control

Lock-up

Control

TCS Control Unit
EPS Control Unit Engine RPM
Air Conditioning Signal Brake Switch Signal
Vehicle Speed Sensor Signal
Mainshaft Speed Sensor Signal
Countershaft Speed Sensor Signal

Self-Diagnosis
Function

Self-Diagnosis Indicator

INTERLOCK
CONTROL UNIT
Lock-up Control Solenoid
Valve B
Lock-up Control Solenoid
Valve A Shift Control Solenoid

Valve B

Shift Control Solenoid
Valve A

Linear Solenoid
Throttle Position
Sensor Signal
Engine Coolant

Temperature
Sensor Signal
Accet Pedal

Angle Signal

Service Check
Connector
ProCarManuals.com

Road Test

NOTE:
Warm up the engine to normal operating temperature (the cooling fan comes on).
When the engine coolant temperature is below normal operating temperature, the shift point is higher than specifiedvehicle speed.
Range 1. Apply parking brake and block the wheels. Start the engine, then move the selector to while depressing the brake
pedal. Depress the accelerator pedal, and release it suddenly. Engine should not stall.
2. Check that shift points occur at approximate speeds shown. Also check for abnormal noise and clutch slippage.
NOTE: Throttle position sensor voltage represents the throttle opening.

DIGITAL MULTIMETER

KS–AHM–32–003

ECM

TEST HARNESS

07LAJ–PT3010A

1. Connect the Test Harness between the ECM and connector (see section 11).
2. Set the digital multimeter to check voltage between D11 (+) terminal and D22 (-) terminal for the throttle posi- tion sensor.ProCarManuals.com

(cont'd)
11. Remove the parking brake cable holders from the rear beam rod.

12. Remove the rear beam rod.

13. Remove the front exhaust pipe A.

PARKING BRAKE

CABLE HOLDER
PARKING BRAKE

CABLE
Corrosion resistant bolt/nut

Replace.
SELF-LOCKING NUT

REAR BEAM ROD
GASKET

Replace.

SELF-LOCKING NUT

Replace.

FRONT EXHAUST

PIPE A

14. Remove the parking brake cable holder and the wheel sensor wire clamp.

15. Make a reference mark on the flange of the adjusting bolt, adjusting cam and lower control arm.

16. Separate the toe control arm from the side beam.

17. Remove the damper fork bolt.

18. Separate the lower control arm from the side beam.

19. Remove the right driveshaft from the intermediate shaft.

DAMPER FORK BOLT

PARKING BRAKE

CABLE HOLDER

WHEEL SENSOR

WIRE CLAMP

LOWER CONTROL ARM

SELF-LOCKING NUT

Replace.
SIDE BEAM

TOE CONTROL ARM

SELF-LOCKING

NUT

Replace.

ADJUSTING BOLT
ADJUSTING CAM
Corrosion resistant bolt/nutProCarManuals.com

Transmission

Removal (cont'd)

20. Remove the intermediate shaft heat cover and the intermediate shaft mounting bolts.

21. Pry the intermediate shaft out of the differential. Pull and remove it.

NOTE:

INTERMEDIATE SHAFT

INTERMEDIATE SHAFT

HEAT COVER

INTERMEDIATE SHAFT

MOUNTING BOLT
SET RING

Replace.

INTERMEDIATE SHAFT

22. Remove the parking brake cable holder and the wheel sensor wire clamp.

23. Make a reference mark on the flange of the adjusting bolt, adjusting cam and lower control arm.

24. Separate the toe control arm from the side beam.

25. Remove the damper fork bolt.

26. Separate the lower control arm from the side beam.

27. Pry the driveshaft out of the differential. Pull and remove it.

NOTE:

TOE CONTROL ARM

DAMPER FORK BOLT

PARKING BRAKE

CABLE HOLDER

SIDE BEAM

SET RING

Replace.

SELF-LOCKING NUT

Replace.
ADJUSTING

CAM
ADJUSTING

BOLT
SELF-LOCKING

NUT

Replace.
LOWER CONTROL

ARM
WHEEL SENSOR

WIRE CLAMP
SUPPORT BASE
Coat all precision finished surfaces with clean engine oil or grease.

Tie plastic bags over the driveshaft ends.

Coat all precision finished surfaces with clean engine oil or grease.

Tie plastic bags over the driveshaft ends.ProCarManuals.com

LEFT SIDE COVER
DOWEL PIN
GASKET Replace.
SEALING WASHER
Replace.

O-RING
Replace.

1ST-HOLD CLUTCH FEED PIPE
O-RING
Replace.
FEED PIPE FLANGE
SNAP RING
1ST CLUTCH FEED PIPE
O-RING
Replace.
FEED PIPE FLANGE
SNAP RING
CONICAL SPRING WASHER
Replace.
BALL BEARING
1ST-HOLD CLUTCH ASSEMBLY
O-RING
Replace.
THRUST WASHER
THRUST NEEDLE BEARING
1ST-HOLD CLUTCH HUB
COUNTERSHAFT 1ST GEAR
ONE-WAY CLUTCH NEEDLE BEARINGS
COUNTERSHAFT 1ST GEAR COLLAR
PARKING GEAR
CONICAL SPRING WASHER
Replace.
1ST CLUTCH ASSEMBLY
O-RING
Replace.
THRUST WASHER
THRUST NEEDLE BEARING
NEEDLE BEARINGMAINSHAFT 1ST GEAR
THRUST WASHER MAINSHAFT 1ST GEAR COLLAR
PARKING BRAKE PAWL STOPPER PARKING BRAKE PAWL
PARKING BRAKE PAWL SPRING
PARKING BRAKE PAWL SHAFT
LOCK WASHER
Replace.
PARKING BRAKE STOPPER

ROLLER PIN

PARKING BRAKE LEVER
WASHER
PARKING BRAKE SPRING

ROLLER

COTTER PIN
Replace.
SEALING WASHER
Replace.

CONICAL SPRING WASHER
Replace.

TRANSMISSION HANGER/CONNECTOR STAY
SEALING WASHER
Replace.

BREATHER JOINT
BREATHER CAP
TRANSMISSION HANGER COUNTERSHAFT SPEED SENSOR
O-RING
Replace.
ATF COOLER
ATF COOLER FILTER/GASKET
Replace.

SPEED SENSOR COVER
LINEAR SOLENOID SHIM
O-RING
Replace.
LINEAR SOLENOID
CONNECTOR STAY
MAINSHAFT SPEED SENSOR
O-RING
Replace.
ATF LEVEL GAUGE
ATF LEVEL GAUGE PIPE
O-RING
Replace.
RETAINER PLATE
BALL BEARING
COUNTERSHAFT SPEED SENSOR WASHER
TORQUE SPECIFICATIONProCarManuals.com

Left Side Cover

Removal

CAUTION: Protect the lip of the
driveshaft oil seal by reinstalling three
bolts, after removing the speed sensor
cover.

DRIVESHAFT

OIL SEAL
VEHICLE SPEED

SENSOR (VSS)

COVER BOLT

MAINSHAFT HOLDER

07924–PJ4010A

NOTE: Using a chisel, cut the lock tab. Pry

it up and then remove the locknut from each

shaft.
CAUTION: Keep all of the chiseled
particles out of the transmission.

CHISEL

LOCK TAB

Reinstall 3 bolts around
the driveshaft oil seal.

NOTE:

Clean all parts thoroughly in solvent or carburetor cleaner and dry with compressed air.
Blow out all passages.
Cut the lock tab and raise it, then remove the locknut of each shaft.
Countershaft locknut has left-hand threads.
1. Remove the vehicle speed sensor (VSS) cover, then reinstall three bolts around the driveshaft oil seal.
CAUTION: Do not damage the driveshaft oil seal lip.
2. Slip the special tool onto the mainshaft and engage the parking brake pawl with the parking gear.
3. Remove the transmission left side cover in the following numbered sequence. NOTE: Remove the special tool from the mainshaft after removing the locknuts.ProCarManuals.com

Transmission
Installation (cont'd)

11. Install a new set ring on the end of the left driveshaft and intermediate shaft.

12. Install the left driveshaft.
13. Install the lower control arm to the side beam. CAUTION: Line up the reference marks on the adjusting boh, adjusting cam and lower control arm.

14. Install the damper fork bolt.
15. Install the toe control arm to the side beam. CAUTION: Make sure that the reference marks on the toe control arm are aligned.
16. Install the wheel sensor wire clamp and parking brake cable holder.

SELF-LOCKING NUTReplace.
12 x
1.25
mm

95 N .
m (9.5 kg-m, 69 Ib-ft) DAMPER
FORK BOLT
SELF-LOCKING NUT
Replace.

12 x 1.25mm

85 N .
m (8.5 kg-m, 62 Ib-ft)

6x1.0
mm
10 N .
m (1.0 kg-m, 7 Ib-ft)

FLANGE BOLT
12 x
1.25
mm

95 N .
m (9.5 kg-m, 69 Ib-ft)

TOE CONTROL ARM SET RING

6x1.0
mm

Replace. SELF-LOCKING NUT
ADJUSTING NUT
Replace.
14 x 1.5 mm

125 N .
m (12.5 kg-m. 90 Ib-ft)

ADJUSTING CAM

ADJUSTING BOLT

17. Install the intermediate shaft and tighten the intermediate shaft mounting bolts to the intermediate shaft support base.
18. Install the intermediate shaft heat cover.
6x1.0
mm
10 N·m

(1.0 kg-m, 7 Ib-ft)
INTERMEDIATE SHAFT
HEAT COVER

8x1.25 mm
22 N·m
(2.2 kg-m, 16 Ib-ft)
INTERMEDIATE SHAFT
SET RING

Corrosion resistant bolt/nut

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

14 x 1.5 mm
125 N .
m

(12.5 kg-m, 90 Ib-ft)ProCarManuals.com

19. Install the right driveshaft on the intermediate shaft.

20. Install the lower control arm to the side beam. CAUTION: Line up the reference marks on the adjusting bolt, adjusting cam and lower control arm.

21. Install the damper fork bolt.
22. Install the toe control arm to the side beam. CAUTION: Make sure that the reference marks on the toe control arm are aligned.
23. Install the wheel sensor wire clamp and parking brake cable holder.
Corrosion resistant bolt/nut
SELF-LOCKING NUT DAMPER FORK
BOLT
SELF-LOCKING NUTReplace.
12 x
1.25
mm

95 N .
m (9.5 kg-m, 69 Ib-ft)

6 x 1.0 mm

FLANGE BOLT

(cont'd)

SELF-LOCKING NUT

Replace.

10 x
1.25
mm

55 N .
m (5.5 kg-m, 40 Ib-ft)
10 x
1.25
mm

60 N .
m (6.0 kg-m, 43 Ib-ft) 95 N
.
m (9.5 kg-m, 69 Ib-ft)

12 x
1.25
mm
22 N
.
m
(2.2 kg-m,

16 Ib-ft)
8 x
1.25
mm

22 N .
m

(2.2 kg-m, 16 Ib-ft)
8 x
1.25
mm
GASKET

Replace.
SELF-LOCKING NUT
Replace.
10 x
1.25
mm

34 N .
m

(3.4 kg-m. 25 Ib-ft)

24. Install the front exhaust pipe A.

25. Install the rear beam rod.
26. Install the parking brake cable.
ADJUSTING CAM

125 N
.
m (12.5 kg-m, 90 Ib-ft)

ADJUSTING NUT

Replace.
14 x 1.5 mm
TOE CONTROL ARM

95 N
.
m

(9.5 kg-m, 69 Ib-ft) Replace.

12 x
1.25
mm

85 N .
m

(8.5 kg-m, 62 Ib-ft)

10 N .
m

(1.0 kg-m, 7 Ib-ft)

12 x
1.25
mm

Corrosion resistant bolt/nut
ADJUSTING

BOLT
SELF-LOCKING NUT
Replace.

14 x 1.5 mm

12.5 N·m (12.5 kg-m, 90 Ib-ft)
LOWER CONTROL ARM

6 x 1.0 mm

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