2003 HONDA CIVIC k2 terminal

I
Individual
Multiplex
DTC
Probable Cause
The multiplex control unit cannot
receive signals from the gauge
assemDty.'lFaulty power or ground to thegauge assembly
2.Faulty gauge assemblv
3.Faulty under-dash f use/relay
box
The multiplex control unit cannot
receive signals from the ECM
1Faulty power or ground to the
ECM
2.Faulty ECM?Faulty under-dash fuse/relay
box
JInternal failure of the multiplex
control unit
1Faulty under-dash fuse/relay
box
5The gauge assembly cannot receive
signals from the multiplex control
unit and the ECM
Faulty power or ground to thegauge assembtv
Faulty qauge assemblv
6The ECM cannot receive signals
from multiplex control unit and thegauge assembty
1Faulty power or ground to the
ECM
Faulty ECM'
I
'Before replacing a Faulty ECM/PCM make sure ithas the latest software revision. UDdate if
necessary before swapping or replacing.
DTCs
Multiplex
DTC
Probable Cause
1,2 and 3
&
ECM DTC
P0600
Simultane
ously
Short to ground on one of the
communication wires.
Short to ground on the YEL wire
between the PCM terminal E24
and the under-dash fuse/relay
box terminal E10
2.Short to ground on the WHT/
GRN wire between the Gauge
assembly terminal A2 and
under-dash fuse/relay box
terminal K10
1and6
Simultane
ous ly
Open in the communication wire
IOpen in WHT/GRN wire
between the under-dash fuse/
relay box terminal K10 and the
Gauqe assemblV terminal 42
2and5
Simultane
ously
Open in the communication wire
1Open in the YEL wire between
the under-dash fuse/relay box
terminal E10 and ECM terminal
(cont'd)
22-173

IMultiplex Control Unit Input Test
Remove the driver's dashboard lower cover (see page 20-59).
Disconnect the under-dash fuse/relay box connectors C, E, F, J, K, O, p, O, X and y.
NOTE: All connectors are wire side of female terminals.
CONNECTOR C {14P}CONNECTOR E I13P)
1.
2.
CONNECTOR F {12P}
GRN/RED {USAIGRN/ORN (Canada)
coNNECTOR P (18P)
CONNECTOR J {8PI
WHT/RED
123
4561
BLK
{cont'd)
GRN/ORN BLU
CONNECTOR K {17P)
I
CONNECTOR O I12P)
CONNECTOR X {8P)CONNECTOR O (8P}
LT GRN/RED GRN/ORN
CONNECTOR Y {13P)
BRN/YEL
BLU/REDBLU/RED
345
67E10 )./12
YELGRN/RED
12457
810/V,/ l,/
WHT/GBN
3567I
,/1,/l,/121517
REDGRN/RED
WHT/BLK
RED/WHT
23,/1,/
618r012
BLK
22-175

Multiplex Control System
Multiplex Control Unit lnput Test (cont'd)
3. Inspect the connector and socket terminals to be sure they are all making good contact
.lftheterminalsarebent,looseorcorroded,repairthemasnecessary,andrecheckthesystem. llthe terminals look OK, go to step 4.
4. Reconnectthe connectorstothe under dash fuserelay box, and make surethese inputtests atthe appropriate connectors on lhe under-
dash fuse/relav box.
. lf any test indicates a problem, {ind and correct the cause, then recheck the system. lf allthe input tests prove OK, the multiplex control unit must be faulty. Replace the under_dash fuse/relay box assembly
CavitvWireTest conditionTest: Desired .esult r Possible cause if resullE qS!q!!e!!ed
J4BLK[J nder all conditionsCheck {or voltage 1o ground:Therc sholl.l he 1V or lessPoor ground (G20'l)An ooen in the wire
Y6BLKlJnder all conditionsCheck for voltage to ground:There should bc 1 V or less.Poor ground 1G501)An ooen in the wire
Y1BFNryELParking brake leverdown, turn theigntion switch ON (ll)
Check for voltage to ground:There should be battery voltagewhile the Brake system indicator ison forthe buld check.
An open in the wireShortto groundFaulty ABS modulatorcontrol unit
Check for voltage to ground:There should be 1V or less when the
J2WHT/REDUnder allconditionsCheck for voltage to groundiThere should be baftery voltage.Blown No.9 (10A)fuse in the under'hoodfuse/relay boxAn oncn in rhc wire
CavitvTest conditionTesi: Oesired resultPossible cause ifresult is notobtained
o3GRNDriver's door openCheck for voltage to ground:There should be 1 V or less-Faulty driver's door switchAn ooen in the wire
Driver's door closedCheck for voltage to ground:There should be 5 V or more.Faulty driver's door switchShort to qround
O4LT GRN/REDPassenger's doorCheck .for voltage 10 ground:There should be 1 V or less.Faulty passenger's door switchAn ooen inthewire
Passenger's doorCheck for voltage to ground:There should be 5 V or more.Faulty passenger's door switchShort to oround
osI]l.l
4.,
F1
F8
GRN/ORN
GRN/ORN
GRN/RED(USA)GRN/ORN(Canada)
Parking brake leverCheck for voltage to groLrnd:There shorl.l be 1 V or less.Faulty parking brake switch. An ooen in thewireCheck for voltage to ground:There should be 5 V or more.
. Faulty parking brake switchShortto ground
o5BLU/REDlgnition switch ON (ll),
driver's seat belt isCheck for voltage to ground:There should be 1V or less.Faulty driver's seat belt switchPoorground (G551)An oDen in the wire
Q6BLU/REDlgnition switch ON (ll)
driver's seat belt isbuckled.
Check {or voltage to ground:There should be 6 V or more.Faulty driver's seat belt switchShortto ground
P18RED
H",=
Check for voltage to ground:There sho0ld be 1V or less-
f -9*:li:'^:**:':s*:*
Faulty hatch latch swrtchPoor ground (G552)An open in the wireFaulty hatch latch switch
X5lgnirion key in the Check for voliage to gtound:ignit on switch Thpre should be I V or lcss
lgnrtron kev our o{ the Check for vollage to ground:
. Faulty ignition key switch. Poor ground (G401). An open in the wire
I : [11y.'::i':::1"' **6
\
22-176

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

Backprobing Spring-loaded Lock Connectors
When checking voltage or resistance on this type of
connector the first time, you must remove the retainer
to insert the tester orobe from the wire side.
NOTE: lt is not necessary to reinstall the removed
retainer;the terminals will stay locked in the connector
housrno.
A
To remove the retainer (A), insert a flat-tip screwdriver
(B) between the connector body and the retainer, then
carefully pry out the retainer. Take care not to break the
connector.
Seats with Side Airbags
Seats with side airbags have a "SIDE AIRBAG" label on
the seat-back. Because the component pans (seat-back
cover, cushion, etc.) of seats with and without airbags
are different, make sure you install only the correct
replacement parts.
When cleaning, do notsaturatethe seatwith liquid,
and do not sDrav steam on the seal
Do not reoalr a torn or fraved seat-back cover.
ReDlace the seat-back cover.
After a collision in which the side airbag was
deployed, replace the side airbag with new parts. lf
the seat-back cushion is split, it must be replaced. lf
the seat-back frame is deformed, it must be replaced.
Never put aftermarket accessories on the seat {covers,
pads, seat heaters, lights, etc.).
(cont'd)
23-19

General Troubleshooting Information
DTC (Diagnostic Trouble Codesl
The self-diagnostic function of the SRS system allows it
to locate the causes of system problems and then store
this information in memory. For easier troubleshooting,
this data can be retrieved via a data link circuit.
. When you turn the ignition switch ON (ll), the SRS
indicator will come on. lf it goes off after 6 seconds,
the system is normal.. lf there is an abnormality, the svstem locates and
defines the problem, stores this information in
memory, and turns the SRS indicator on. The data
will remain in the memory even when the ignition
switch is turned off or if the battery is disconnected.. When you connect the Honda PG lM Tester to the 16P
data link connector (DLC)to short the SCS terminal,
and turn the ignition switch ON (ll). the SRS indicator
will indicate the diagnostic trouble code (DTC) by the
number of blinks.. When you connect the Honda PGM Tester to the 16P
data link Connector (DLC), you can retrieve the DTC in
the Honda Systems "SRS" menu.. After reading and recording the DTC, proceed with
the troubleshooting procedure for th is code.
Precautions. Use only a digital multimeter to check the system. lf
it's not a Honda multimeter, make sure its output is
10 mA (0.01A) or less when switched to the smallest
value in the ohmmeter range, A tester with a higher
output could damage the airbag circuit or cause
accidental airbag deployment and possible injury.. Whenever the ignition switch is ON (ll), or has been
turned OFF for less than 3 minutes, be careful not to
bump the SRS uniU the airbags could accidentally
deploy and cause damage or injuries.. Before you remove the SRS harness, disconnect the
driver's airbag connector. the front passenger's
airbag connector, both side airbag connectors, both
seat belt buckle tensioner connectors, and both seat
belt tensioner connectors.. Make sure the battery is sufficiently charged. lf the
battery is dead or low, measuring values won't be
correct.. Do not touch a tester probe to the terminals in the
SRS unit or harness connectors, and do not connect
the terminals with a jumper wire. Use only the
backprobe set and the Honda PGM Tester. Backprobe
spring loaded lock type connectors correctly.
Reading the DTC
When the SRS indicator is on, read the DTC using either
of the following methods:
PGM Tester "SRS" Menu Method:
Connect the Honda PGM Tester {A) to the 16P data link
connector {DLC)(B), and follow the Tester's Drompts in
the "SRS" menu.
lf the Tester indicates no DTC, no communication. DTC
3-6 to 3-'10, DTC 4-6 to 4-10, DTC 9-1, or DTC 9-2,
double-check by using the "SCS" menu method.
(cont'd)
23-23

13. Check resistance between the No. 7 and the No. '16
terminals and between the No. 6 and the No. 15
terminals of SRS unit connector A (18P). There
should be 2.0 3.0 0.
SRS UNIT CONNECTOR A I18P)
Wire side of female terminals
ls the resistance as specilied?
YES-Faulty SRS unit or poor contact at SRS unit
connector A (18P) and the SRS unit, check the
connection between the connector and the SRS
unit. lf the connection is OK, replace the SRS unit
(see page 23-122).1
NO-Open or increased resistance in dashboard
wire harness B orthe cable reel; replace the cable
reel. lf the problem still present, replace dashboard
wire harness B.
DTC 1-3: Short to Another Wire or Decreased
Resistance in Driver's Airbag Inflator
SpecialTools Required. SRS inflator simulator 07SAZ-T8401 1A. SRS simulator lead F 07XAZ-S230100
1. Erasethe DTC memory (see page 23-26).
2. Turn the ignition switch ON (ll), and check that the
SRS indicator comes on for about 6 seconds and
then goes of{.
Does the SRS indicator stay on?
YES-Go to step 3.
NO Intermittent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures (see
page 23-261.
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes,
Disconnect the driver's airbag 4P connector (A)
from the cable reel.
07sAz-T84011A
07xAz-s230100
Connectthe SRS inflator simulator {2 0
connectors) and the simulator lead F to the cable
reel.
Reconnect the battery negative cable.
Erase the DTC memory.1.
(cont'd)
23-37

sRs
DTC Troubleshooting {cont'd)
8. Read the DTC.
Is DTC 1-3 indicated?
YES Go to step 9.
NO Short in the driver's airbag; replace the
driver's airbag (see page 23-'l 13).1
9. Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
10. Disconnect the front passenger's airbag 4P
connector from dashboard wire harness B (see step
3 on page 23-21).
1 '1. Disconnect both seat belt tensioner 2P connectors
from the floor wire harness (see step 5 on page 23-
22t.
12. Disconnect SRS unit connectorA (18P)from the
SRS unit (see step 7 on page 23-221.
13. Disconnectthe special tool from the cable reel.
23-38
IJ
14. Check resistance between the No. 7 and the No. 16
terminals and between the No.6 and the No. 15
terminals of SRS unit connectorA (18P). There
should be an open circuit, or at least 1 M Q .
SRS UNIT CONNECTOR A {18P)
GRN/WHT GRN/RED
GRN/YELGRN/BLK
Wire side of female terminals
ls the rcsistance as specified?
YES Faulty SRS unit; replace the SRS unit (see
page 23-122],.a
NO Go to step 15.
Disconnect the cable reel from dashboard wire
harness B. Check resistance between the No,7 and
the No. 16 terminals and between the No. 6 and the
No. 15 terminals of SRS unit connector A (18P).
There should be an open circuit, or at least 1 M Q .
ls the resistance as specified?
YES Replace the cable reel.I
NO-Replace dashboard wire harness B.l