wiring HONDA CIVIC 2003 7.G Workshop Manual

Engine Assembly
I
Engine Removal
Special Tools Required
Front subframe adapter EOS02C00001 1
NOTE:. Use fender covers to avoid damaging painted
surfaces.. To avoid damage, unplug the wiring connectors
carefully while holding the connector portion.. Mark all wiring and hoses to avoid misconnection.
Also, be sure that they do not contact other wiring orhoses, or interfere with other parts.
1. Secure the hood in the wide open position (support
rod in the lower hole).
2. Make sure you have the anti-theft code for the radio,
then write down the frequencies for the radio'spreset buttons.
3. Disconnect the negative cable from the battery first,then disconnect the positive cable.
4. Remove the battery.
5. Remove the intake manifold cover.
II
5-2
\,
6. Disconnectthe intake airtemperature (lAT) sensorconnector (A), remove the breather hose (B) and
vacuum hose (C), then remove the air cleaner
housing cover/intake air duct assemblv (D).
AC
7. Remove the air cleaner housing.

Engine Assembly
Engine Removal (cont'd)
43. Use a marker to make alignment marks on the
reference lines (A) that align with the centers of the
rear subframe mounting bolts (B).
, !:_- _l.= :r -- ---.-','- -
44. Remove the front subframe (C).
5-8
ffi4
ffit'"
45. Disconnect the compressor clutch connector (A),
then remove the Ay'C compressor (B)without
disconnecting the A'./C hoses.
Check that the engine/transmission is completely
free of vacuum hoses, fuel and coolant hoses, and
electrical wiring.
Slowly lower the engine about 150 mm (6 in.).
Check once again that all hoses and wires are
disconnected trom the engine/transmission.
Lower the engine all the way. Remove the chain
hoist from the engine.
Remove the engine from under the vehicle.
46.
47.
48.
49.

Gylinder Head Removal
NOTE:. Use fender covers to avoid damaging painted
surfaces.
To avoid damage, unplug the wiring connectors
carefully whlle holding the connector portion.
To avoid damaging the cylinder head, wait until the
engine coolant temperature drops below 100'F (38"C)
betore loosening the cylinder head bolts.
Mark all wiring and hoses to avoid misconnection.
Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
'1.
2.
3.
Drain the engine coolant (see page 10-6).
Remove the drive belt (see page 4-26).
Remove the intake manifold {see page 9-3).
Remove the air cleaner housing (see step 7 on page
5-2t.
5. Remove the water bypass hose (A).
Remove the exhaust manifold (see page 9-7
Remove the cam chain (see page 6-12).
6.
7.
).
8. Remove the engine wire harness connectors and
wire harness clamps from the cylinder head.
. Engine coolant temperature (ECT) sensor
conneclor. Camshaft position (Cl\4P) (top dead center (TDC))
sensor B connector. Camshaft posilion (CMP) sensor A connector
9. Remove the upper radiator hose (A) and heater
hose (B).
'10. Remove the harness holder (A)from the bracket,
then remove the connecting pipe mounting boh {B)
and brake booster vacuum line mounting bolts {C).
(cont'd)
1 1. Remove the water bvpass hose (D).
6-23

General Troubleshooting Information
Tips and Precautions
Bef ore Troubleshooting
1. Check applicable fuses in the appropriate fuse/relay
oox.
2. Check the battery for damage. state of charge, and
clean and tight connections.
. Do not quick-charge a battery unless the battery
ground cable has been disconnected, otherwise
you will damage the alternator diodes.. Do not attempt to crank the engine with the
battery ground cable loosely connected or you
will severely damage the wiring.
Handling Connectors. Make sure the connectors are clean and have no
loose wire terminals.. Make sure multiple cavity connectors are packed with
dielectric grease (except waterti ght connectors).. All connectors have push-down release type locks (A).
Some connectors have a clip on their side used to
attach them to a mount bracket on the body or on
another component. This clip has a pull type lock.
Some mounted connectors cannot be disconnected
unless you first release the lock and remove the
connector from its mount bracket (A).
Never try to disconnect connectors by pulling on their
wires; pull on the connector halves instead.
Alwavs reinstall Dlastic covers,
Before connecting connectors, make sure the
terminals (A) are in place and not bent.
(cont'd)
22-3

sRs
Precautions and Procedures
General Precautions
Please read the following precautions carefully beforeperforming airbag system service. Observe theinstructions described in this manual. or the airbags
could accidentally deploy and cause damage or injuries.
. Except when performing electrical inspections.
always turn the ignition switch OFF, disconnect the
negative cable from the battery, and wait at least 3minutes before beginning work.
NOTE: The memory is not erased even if the ignition
switch is turned OFF or the battery cables are
disconnected from the battery.. Use replacement pans which are manufactured to the
same standards and quality as the original parts. Do
not install used SRS parts from another vehicle. Useonly new pans when making SRS repairs.. Carefully inspect any SRS part before you install it.
Do not install any part that shows signs of being
dropped or improperly handled, such as dents, cracks,
or deformation.
. Before removing any SRS parts (including the
disconnection of connectors), always disconnect the
SRS connector.. Use only a digital multimeter to check the system. lf itis not a Honda multimeter, make sure its outout is 10mA (0.01A) or less when switched to the lowest value
in the ohmmeter range. A tester with a higher output
could cause accidental deployment and possible
injury.. Do not put objects on the front passenger's airbag.. The original radio has a coded theft protection circuit.
Be sure to get the customer's radio code and write
down the frequencies for the radio's preset stations
before disconnecting the battery cable.. Before returning the vehicle to the customer, enter
the radio code. then enter the customer's radio
station presets, and set the clock. Do the engine
control module (ECM) idle learn procedure (see page
11-139).
23-14
c
Steering-related Plecautions
Cable Reel Alignment
. Misalignment of the cable reel could cause an open in
the wiring, making the SRS system and the horns
inoperative. Center the cable reel whenever the
following is performed (see step 6 on page 23-121).
- Installation of the steering wheel- Installation of the cable reel- Installation ofthe steering column- Other steering-related adjustment or installation
. Do not disassemble the cable reel.
. Do not apply grease to the cable reel.
. lf the cable reel shows any signs of damage or
contamination. replace it with a new one. For
example, it does not rotate smoothly.

I
J
Wiring Precautions
Some of the SRS wiring can be identified by a special
yellow outer covering, and the SRS connectors can be
identified by their yellow color.
Observe the instructions described in this section.
. Never attempt to modify. splice, or repair SRS wiring.
lf there is an open or damage in SRS wiring, replace
the harness.
Be sure to install the harness wires so they do not get
Dinched or interfere with other Darts.
Make sure all SRS ground locations are clean, and
grounds are securely fastened for optimum metal-to-
metal contact. Poor grounding can cause intermittent
problems that are difficult to diagnose.
Precautions for Electrical Inspections
. When using electricaltest equipment, insertthe
probe of the tester into the wire side of the connector.
Do not insert the probe of the tester into the terminal
side of the connector, and do not tamper with the
connector.
Use a U-shaped probe. Do not insert the probe
forcibly.
Use specified service connectors in tro u bleshooting.
Using improper tools cou ld cause an error in
inspection due to poor metal-to-metal contact.
(cont'd)
23-17