2002 HONDA CIVIC EPS

10. Close the ear portion (A) of the band with a
commercially available boot band pincers Kent-
Moore J-35910 or equivalent (B).
Check the clearance between the closed ear portlon
of the bands. lf the clearance is not within the
standard, close the ear podion of the bands farther.
11.
12.Repeat steps 10 and 11 for the band on the other
end of the boot.
6.0 mm 10.24 in.) MAX
3.0 mm {0.12 in.} MAX
Driveshafts Installataon
1. Install a new set ring onto the set ring groove of the
driveshaft {left driveshaft ).
Apply 0.5 1.0 g {0.02 0.04 oz) of specified grease
tothewhole splined surface (A) ofthe right
driveshaft. After applying grease, remove the
grease from the splined grooves at intervals of 2-
3 splines and from the set ring groove (B) so that
air can bleed from the intermediate shaft.
(cont'd)
16-17

Steering
Steering
Special Tools ............. 17-2
Comoonent Location Index ......................................... 17-3
Steering Wheel Rotational Play Check .....................". 17-4
Power Assist Check .................. .......... 17-4
Steering Linkage and Gearbox Inspection ................. 17-5
Steering Wheel Removal .........................,................... 17-6
Steering Wheel Disassembly/Reassembly ................ 17-7
Steering Wheel Installation ............... 17-8
Steering Column Removal and Installation ...........'... 17-9
Steering Column Inspection .............. 17-11
Steering Lock Replacement .......................................'. 17-'12
Rack Guide Adiustment ....."........'..'.. 17-13
Electrical Power Steering (EPS)17-15

Steering
Steering Wheel Rotational Play
Check
1. Turn the front wheels to the straight ahead position.
2. Measure how far you can turn the steering wheel
left and right without moving the front wheels.
. lf the play is within the limit, the gearbox and
linkage are OK.. lf the playexceedsthe limit, adjustthe rack guide
{see page '17-13). lf the play is still excessive after
rack guide adjustment, inspect the steering
linkage and gearbox {see page 17-5).
BOTATIONAL PLAY: 0 10 mm (0-0.39 in.l
+:
17-4
Power Assist Check
Start the engine, and let it idle.
Attach a commercially available spring scale to the
steering wheel. With the engine idling and the
vehicle on a clean, dry floor, pull the scale as
shown, and read it as soon as the tires begin to turn.
\
1.
3. lf the scale reads no morethan 29 N (3.0 kgf,6.6 lbf),
the power assist is OK. lf it reads more, check these
items:
. Front tire pressure. Steering linkage (see page 17-5). Rack gulde adjustment (see page 17-13). EPS system (see page 17-18)

Electrical Power Steering (EPSI
SpecialTools ............. 17 -16
Component Location Index ......................................... 17-17
General Troubleshooting Information ....................... 17-18
DTC Troubleshooting Index .............. 17-22
Symptom Troubleshooting Index ............................... 17 -23
System Description ................. ........... 17-24
Circuit Diagram ......... 17-26
DTC Troubleshooting ............... .......... 17-28
EPS lndicator Circuit Troubleshooting ....................... 17-47
Motor Removal/lnstallation ............... 17-49
Steering Gearbox Removal ............... 17-51
Steering Gearbox Overhaul ............... 17-55
Steering Gearbox Installation ........... 17-63
EPS Control Unit Remova l/lnsta llation ....................... 17-67
Tie-rod Ball Joint Boot Replacement .......................... 17-67

EPS Components
Rel.No.Tool NumberDescriptionotv(!)
at'
o
07MAC-S100200
070AD-P0A0100
07zAA-S5A0100
Ball Joint Remover, 28 mm
Attachment, 42 mm
Locknut Wrench
'1
1'l
SpecialTools\
,.^G) C\
_---1t
-)
)
h5--d-'
u_r-.c_-tt)\L-,
t
I
17-16
a

Component Location Index
UNDER.HOODFUSE/RELAY BOX
EPS CONTROL UNITEPS Control Unit Removal/lnstallation,page 17 -67
UNDER.DASH FUSE/RELAY BOX
-,'/.,....
'.,i,
X ]
DATA LINK CONNECTOR I16P)
TOROUE SENSOR
STEERING GEARBOXSteering Gearbox Removal, page 17-51Steering Gearbox Overhaul, page 17-55Steering Gearbox Installation, page 17-63
Removal/lnstallation,page l7-49
GAUGE ASSEMBLY
MOTOR
17-17

EPS Components
aGeneral Troubleshooting Information
EPS Indicator
Under normal conditions, the EPS indicator comes on when
the ignitlon switch is turned to the ON (ll) position, then goes
off after the engine is started. This indicates that the bulb and
its circuit are operating correctly.
lf there is any trouble in the system after the engine is started,
the EPS indicator will stay on, and the power assist is turned
off.
When EPS indicator light comes on, the control unit
memorizes the DTC. In this case, the control unit will not
activate the EPS system after the engine starts again, but it
keeps the EPS indicator on.
When DTC 12, 16, 17, 18 or 67 is stored in the control unit, the
EPS indicator will stay on until the DTC is erased. When a
problem is detected and the EPS indicator comes on, there are
cases when the indicator stays on untilthe ignition switch is
turned 0FF, and cases when the indicator goes off
automatically when the system returns to normal. Even though
the system is operating normally, the EPS indicator will come
on under the following conditions:
Condition '1:
. The vehicle was traveling at least 12.4 mph (20 km/h), then. A rapid change in vehicle speed was detected, then. The vehicle (or the vehicle speed sensor signal) stopped for
at least 5 seconds. The engine speed was still 'l,640rpmorhigherforatleastS
seconds
Condition 2:
After the vehicle (or the vehicle speed sensor signal) has
stopped for at least 10 seconds, yet the engine speed was still
1,640 rpm or higherfor at least 20 seconds.
Condition 3:
When the engine speed is 280 rpm or less, and the vehicle is traveling at
a speed of 6,2 mph (10 km/h) or more for 3 seconds.
To determine the actual cause ofthe problem, question the
customer about the conditions during which the problem
occured, taking the above conditions into consideration.
Diagnostic Trouble Code (DTCI
. lf the CPU cannot be activated, or itfails,the EPS indicator
comes on, but the DTC is not memorized.. The memory can hold any number of DTCS. However, when
the same DTC is detected more than once, the most recent
DTC is written over the prior DTC, therefore only one
occurrence is memorized.. The DTCS are indicated repeatedly untilthe ignition switch is
turned OFF.. lf the DTC is not memorized,the EPS indicator blinks.
. The DTCS are memorized in the EEPRO| (non-volatile
memory) therefore the memorized DTCS cannot be erased
by disconnecting the battery. Perform the specified
procedures to clear DTCS.
Self-diagnosis
Self-diagnosis can be classified into two categories:.Initial diagnosis: performed right after the engine
starts and until the EPS indicator goes off.. Regular diagnosis: performed right after the initial
diagnosis until the ignition switch is turned OFF.
The EPS control unit performs the following functions
when a problem is detected by self-diagnosis;
'1. Turns on the EPS indicator.
2. Memorizes the DTC.
3. Stops power assist and manual steering operation
begrns.
NOTE:. When DTC 23 (a problem with the circuit for
engine speed signal) is detected, the power
assist will return to normal when the vehicle
speed is 0.62 mph (1 km/h) or above.. Fot DfCs 22,23, 64, or 66 the EPS indicator goes
off automatically when the system relurns to
normal. For all other codes, the EPS indicator
goes off when the system is OK after the ignition
switch is turned from OFF to ON (ll).
Restriction on Power Assist Operation
Repeated extreme steering force. such as turning the
steering wheel continuously back-and-forth with the
vehicle stopped, causes an increase of power
consumption in the EPS motor. The increase of electric
current causes the motor to heat up. Because this heat
adversely affects the system, the control unit monitors
the electric current of the motor.
When the control unit detects heat build-up in the motor,
it reduces the electric current to the motor gradually to
protect the system, and it restricts the power assist
operation. The EPS indicator does not come on during
this function.
When steering torque is not applied to the steering
wheel, or when the ignition is turned off, and the motor
cools, the control unit will restore the power assist
gradually until it's fully restored (after approximately 15
minutes maximum).
17-18

How to Troubleshoot EPS DTCs
The troubleshooting flowchart procedures assume that
the cause of the problem is still present and the EPS
indicator is still on, Following the flowchart when the
EPS indicator does not come on can result in incorrect
diagnosis.
The connector iliustrations show the female terminal
connectors with a single outline and the male terminal
connectors with a double outline.
1. Ouestion the customer about the conditions when
the problem occured, and try to reproduce the
same conditions for troubleshooting. Find out
when the EPS indicator came on, such as while
turning. afterturning, when the vehicle was at a
ce rta in speed, etc.
2. When the EPS indicator does not come on during
the test drive, but troubleshooting is done based on
the DTC, check for loose connectors, poor terminal
contact. etc in the affected circuit, before you start
troubleshooting.
3. After trou bleshooting, clear the DTC and test-drive
the vehicle. Be sure the EPS indicator does not
come on.
How to Retrieve EPS DTCs
Honda PGM Tester Method:
1, With the ignition switch OFF, connect the Honda
PGM Tester (A) to the 16P data link connector (DLC)
(B) located under the dash on the driver's side of
the vehicle.
2. Turn the ignition ON (ll), and follow the prompts on
the PGM Tester to display the DTC(s) on the screen.
After determining the DTC, refer to the DTC
Troubleshooting Index.
NOTE: See the Honda PGM Tester user's manual
for specific instructions.
Service Check Signal Circuit Method:
1. With the ignition switch OFF, connect the Honda
PGM Tester (A)to the 16P data link connector (DLC)
(B) located under the dash on the driver's side of
the vehicle.
Short the SCS circuit to body ground using the
Honda PGN4 Tester.
Turn the ignition switch ON {ll).
Record the DTC.
(cont'd)
17-19