sensor ACURA CSX 2006 Service Repair Manual

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DTC 71-04:
YES
NO
YES
NO YES
NO
YES
NO
17-58EPS Components
DTC Troubleshooting (cont’d)
EPS CONTROL UNIT CONNECTOR D (28P)
R1 (BLU)
R2 (PNK)
EPS CONTROL UNIT CONNECTOR D (28P) R1 (BLU)
R2 (PNK)
EPS Motor Angle Sensor (Check
Signals) (Regular Diagnosis)
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Start the engine.
5. Turn the steering wheel to the right or left, and wait
10 seconds or more.
Go to step 6.
Check for loose terminals or poor connections.
If the connections are good, the system is OK at
this time.
6. Check for DTCs with the HDS.
Go to step 7.
Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the EPS control unit connector D (28P). 9. Measure the resistance between the EPS control
unit connector D (28P) terminal No. 13 and No. 27.
Go to step 10.
Go to step 13.
10. Check for continuity between body ground and the EPS control unit connector D (28P) terminal No. 13
and the terminal No. 27 individually.
Go to step 11.
Check for loose terminals in the EPS control
unit connectors, and repair if necessary. If no poor
connections are found, replace the EPS control unit
(see page 17-84).
Wire side of female terminals
Wire side of female terminalsDoes t he E PS i nd i cat or come on?
Is DTC 71-04 indicated? Is t he r esi st ance bet w een 13 25 ?
Is there continuity?
08/08/21 14:54:38 61SNR030_170_0059
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YES
NO YES
NO
17-59
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
R2 (GRN)
R1 (BRN)
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
R2 (GRN)
R1 (BRN)
11. Disconnect the EPS motor angle sensor 6P
connector.
12. On the sensor side check for continuity between body ground and EPS motor angle sensor 6P
connector terminal No. 2 and the terminal No. 5
individually.
Faulty EPS motor angle sensor (internal
failure), or short to body ground in the wire (sensor
side), replace the EPS motor (see page 17-63).
Repair short to body ground in the wire
between the EPS motor angle sensor 6P connector
and the EPS control unit. 13. Disconnect the EPS motor angle sensor 6P
connector.
14. On the sensor side measure the resistance between the EPS motor angle sensor 6P connector terminals
No. 2 and No. 5.
Open, or short to body ground in the wire
between the EPS motor angle sensor 6P connector
and EPS control unit.
Faulty EPS motor angle sensor (internal
failure), or short to body ground in the wire (sensor
side), replace the EPS motor (see page 17-63).
Terminal side of male terminals Terminal side of male terminals
Is there continuity?
Is t he r esi st ance bet w een 13 25?
08/08/21 14:54:39 61SNR030_170_0060
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Removal
17-63
EPS Motor Removal and Installation
A B
6x1.0mm A
B
8x1.25mm
NOTE:
 Do not allow dust, dirt, or other foreign materials to enter the gearbox.
 Make sure not to get any silicone grease on the terminal part of the connectors and switches,
especially if you have silicone grease on your hands
or gloves.
1. Remove the steering gearbox (see page 17-65).
2. Disconnect the torque sensor 3P connector (A) from the steering gearbox, then remove the wire
harness clamp bolts and the ground terminal (B). 3. Remove the EPS motor (A) from the steering
gearbox, then remove the O-ring (B) and discard it.
(cont’d)
Replace.
08/08/21 14:55:08 61SNR030_170_0064
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Installation
17-64EPS Components
EPS Motor Removal and Installation (cont’d)
C
B
E
8x1.25mm
20 N·m
(2.0 kgf·m,
14 lbf·ft)
A
D A
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
B
1. Clean the mating surface of the EPS motor (A) andthe steering gearbox.
2. Apply a thin coat of silicone grease to the new O-ring (B), and carefully fit it on the EPS motor.
3. Apply steering grease into the EPS motor shaft (C).
4. Set the EPS motor on the gearbox by engaging the EPS motor shaft and the worm shaft (D).
5. Turn the EPS motor two or three times to the right and left about 45 degrees. Make sure the EPS
motor is evenly seated on the steering gearbox,
and that the O-ring is not pinched between the
mating surfaces.
6. Loosely install the motor mount bolts(E), then turn the steering shaft two or three times to the right
and left about 45 degrees.
7. Tighten the motor mount bolts to the specified torque. 8. Connect the torque sensor 3P connector (A) to the
steering gearbox, then install the wire harness
clamp bolts and the ground terminal (B).
9. Finish the installation, and note these items:  Make sure the torque sensor 3P connector isproperly connected.
 Make sure the EPS motor and the EPS wires are not caught or pinched by any parts.
10. Install the steering gearbox (see page 17-72).
Replace.
08/08/21 14:55:09 61SNR030_170_0065
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17-67
VSB02C000015
VSB02C000025 B
C
A D
VSB02C000015
AAR-T1256 07MAC-SL0A202
A
B
12 x 1.25 mm 07AAF-SDAA100
D C
AB
15. Attach the engine hanger adapter (VSB02C000015)to the threaded hole in the cylinder head.
16. Install the front leg assembly (A), hook (B), and wing nut (C) from an A and Reds engine support
hanger (AAR-T1256) onto the 2006 Civic engine
hanger (VSB02C000025). Carefully position the
engine hanger on the vehicle, and attach the hook
to the forward hole in the engine hanger adapter
(D). Tighten the wing nut by hand to lift and support
the engine/transmission assembly.
NOTE: Use care when working around the
windshield. 17. Remove the cotter pin (A) from the 12 mm nut (B),
and loosen the nut.
18. Separate the tie-rod ball joint and the knuckle using the ball joint remover (see page 18-12).
19. Remove the front splash shield (see page 20-172).
20. Disconnect the EPS motor connector A (2P), the EPS motor connector B (1P), torque sensor 4P
connector (C), the EPS motor angle sensor 6P
connector (D), from passenger’s side of the
steering gearbox. Wrap the connectors with vinyl
tape to avoid contamination from grease or water.
(cont’d)
Replace.
08/08/21 14:55:10 61SNR030_170_0068
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17-71
A B
6x1.0mm
D
C
B
A
E
A
36. Remove the harness clamp bracket (A) from thefront subframe, then remove the harness clips (B). 37. Remove the EPS motor connector A (2P), the EPS
motor connector B (1P), torque sensor 4P connector
(C), the EPS motor angle sensor 6P connector (D)
from the passenger’s side of the gearbox mounting
bracket (E).
38. Remove the pinion shaft grommet (A) from the top of the torque sensor.
(cont’d)
08/08/21 14:55:14 61SNR030_170_0072
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17-73
A
B
D
C
B
A B
A
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
A BB
A
6. Install the pinion shaft grommet (A). Align the slotin the pinion shaft grommet with the lug portion (B)
on the torque sensor. The grommet must not have
a gap at the mating surface of the grommet and the
torque sensor.
7. Install the EPS motor connector A (2P), the EPS motor connector B (1P), torque sensor 4P connector
(C), the EPS motor angle sensor 6P connector (D)
on the right side of the gearbox mounting bracket. 8. Install the harness clips (A) to the harness clamp
bracket (B), then install the harness clamp bracket
to the front subframe.
9. Carefully raise the front subframe with the front subframe adaptor and the transmission jack or the
powertrain lift until the front subframe is in position,
then loosely install the new front subframe
mounting bolts.
NOTE: Be sure that the pinion shaft grommet is in
place securely. Check whether the pinion shaft
grommet is not turning up. Incorrect installation
can cause leakage of water, mud, and noise.
10. Align the front subframe reference marks (A) to the body (B), as noted during removal.
(cont’d)
08/08/21 14:55:15 61SNR030_170_0074
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17-76EPS Components
Steering Gearbox Removal and Installation (cont’d)
A
B
C
12x1.25mm
59 N·m
(6.0 kgf·m, 43 lbf·ft)
D
12x1.25mm
59 N·m
(6.0 kgf·m, 43 lbf·ft) B
A
E
12x1.25mm
59 N·m
(6.0 kgf·m,
43 lbf·ft) D
C
AB
B
12x1.25mm
54 N·m
(5.5 kgf·m,
40 lbf·ft)
A D
E
C
20. Install the exhaust hanger (A) to the three way
catalytic converter (TWC) (B).
21. Connect the lower arm (A) to the lower ball joint (B).
22. Install a new flange bolt and the new self-locking nuts. After lightly tightening all three fasteners,
tighten them to the specified torque in the
following order; the self-locking nut on the front (C),
the self-locking nut on the rear (D), then the flange
bolt (E). 23. Remove the vinyl tape, then connect the EPS motor
connector A (2P), the EPS motor connector B (1P),
torque sensor 4P connector (C), the EPS motor
angle sensor 6P connector (D) to the steering
gearbox. Make sure to push these connectors until
you hear a click so that the connectors are secured.
24. Install the front splash shield (see page 20-172).
25. Wipe off any grease contamination from the ball joint tapered section and the threads. Reconnect
the tie-rod ends (A) to the steering knuckles. Install
the 12 mm nut (B) and tighten it.
26. Install the new cotter pin (C), and bend it as shown (D) or (E).
27. Install the front wheel, then set the wheels in the straight ahead position.
NOTE: Before installing the wheel, clean the mating
surfaces between the brake disc and inside of the
wheel.
Replace.
Replace.
Replace. Replace.
08/08/21 14:55:18 61SNR030_170_0077
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SymptomProbable cause
17-78EPS Components
Steering Gearbox Removal and Installation (cont’d)
34. Install the steering wheel (see page 17-8).
35. With the tires raised off the ground (vehicle on a
lift), check for the following symptoms by turning
the steering wheel fully to the right and left several
times.
Rubbing sound
coming from the
lower steering
column area. Steering column joint
is contacting the cover.
Grating sound from
the lower steering
column area, or a
rough feeling during
steering. Poor engagement of
the pinion shaft
serrations.
Noise from around
the steering wheel
during steering. Poor engagement of
the SRS cable reel with
the steering wheel, or a
damaged cable reel.
36. Install the air cleaner housing (see page 11- 345).
37. Install the under cowl panel and cowl cover (see page 20-163). 38. Do the battery terminal reconnection procedure
(see page 22-68), and do these tasks:
 Turn the ignition switch to ON (II) and check that the SRS indicator comes on for about 6 seconds
and then goes off.
 Make sure the horn and turn signal switches work properly.
 Make sure the steering wheel switches work properly.
39. After installation, do the following checks:  Check the steering wheel spoke angle. If steeringspoke angles to the right and left are not equal
(steering wheel and rack are not centered),
correct the engagement of the joint/pinion shaft
splines.
 Set the steering column to the center tilt position, and to the center telescopic position, then check
the wheel alignment and adjust (see page 18-5).
 Make sure the steering wheel spokes are centered.
 Start the engine, and let it idle. Turn the steering wheel from lock-to-lock several times. Check that
the EPS indicator does not come on.
 Do the memorizing for the torque sensor neutral position (see page 17-22).
08/08/21 14:55:18 61SNR030_170_0079
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Exploded view
17-79
Rack End Removal and Installation
O-RING
TORQUE SENSOR
CONNECTOR
8x1.25mm
20 N·m
(2.0 kgf·m, 14 lbf·ft)
EPS MOTOR
6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)
LOCKNUT
RACK GUIDE
DISC WASHER
O-RING
SPRING
GEARBOX MOUNT CUSHION GEARBOX HOUSING
MOUNT CUSHION
TIE-ROD CLIPLOCKNUT
14 x 1.5 mm
44 N·m
(4.5 kgf·m, 33 lbf·ft)
BOOT
BOOT BAND
RACK END
93 N·m
(9.5 kgf·m, 69 lbf·ft)
LOCK WASHER
RUBBER STOP GROUND
TERMINAL
TORQUE SENSOR ASSEMBLY
RACK GUIDE
SCREW
HARNESS BRACKET
(cont’d)
Replace.
If the EPS motor is
faulty, replace it.
Replace.
Inspect for damage and deterioration.
Inspect for damage and deterioration.
Inspect for damage and deterioration.
Replace.
Inspect for faulty
movement and damage.
Replace.
Replace. If the torque sensor is damaged,
replace the steering gearbox
as an assembly.
08/08/21 14:55:19 61SNR030_170_0080
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