Body HONDA CIVIC 2003 7.G Workshop Manual

11.
12.
14.
Disconnect SRS unit connector B (18P) from the
SRS unit (see step 7 on page 23-22).
Disconnect the special tool from the floor wire
harness.
Reconnect the battery negative cable.
Turn the ignition switch ON (ll).
Check for voltage between the No. 1 lerminal of
SRS unit connector B {18P) and body ground, and
the No. 10 terminal and body ground. There should
be 0.5 V or less.
SRS UNIT CONNECTOR B I18PI
ls the voltage as specitied?
YES Faulty SRS unit; replace the SRS unit (see
page 23-1221 .f
NO Short to power in the floor wire harness;
replace the floor wire harness.l
I
fJ
4.
DTC 21-5: Short to Ground in Driver's Seat
Belt Buckle Tensioner
Special Tools Required. SRS inflator simulator 07SAZ-TB4011A. SRS simulator lead F 07XAZ-S230100
1. Erase the 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 off.
Does the SBS indicator stay on?
YES-Go to step 3.
NO Intermittent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures (see
page 23-26).
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect the driver's seat belt buckle tensioner
4P connector {A) from the floor wire harness.
Connect the SRS inflator simulator (2 Q
connectors) and simulator lead F to the floor wire
n a rness.
Reconnect the battery negative cable.
Erase the DTC memory.
(cont'd)
6.
7.
23-57

sRs
9.
10.
DTC Troubleshooting (cont'dl
11.
Read the DTC.
ls DTC 21-5 indicated?
YES Go to step 9.
NO Short to ground in the driver's seat belt
buckle tensioner; replace the driver's seat belt
buckle.l
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect both side airbag 2P connectors (see
step 4 on page 23-21)and the front passenger's
seat belt buckle tensioner 4P connector (see step 6
on page 23-221.
Disconnect SRS unit connector B (18P) from the
SRS unit (see step 7 on page 23-22)
Disconnect the special tool from the floor wire
harness.
Check resistance between the No. '1 terminal of
SRS unit connector B (18P) and body ground, and
the No. 10 terminal and body ground. There should
be an open circuit, or at least 1 M Q.
12.
13.
SRS UNIT CONNECTOR B {18PI
ls the tesistance as specilied?
YES Faulty SRS uniu replace the SRS unit (see
page 23-122) .a
NO-Short to ground in the floor wire harness;
replace the floor wire harness.l
23-58
\J
'L
DTC 4-1: Open in Front Passenger's Seat Belt
renstoner
DTC 4-2: lncreased Resistance in Front
Passenger's Seat Belt Tensioner
Special Tools Required. SRS inflator simulator 07SM-T84011A. SRS simulator lead C 07TAZ-S25011A. SRS simulator lead F 07XAZ-S230100
Erase the DTC memory (see page 23-26).
Turn the ignition switch ON {ll), and check that the
SRS indicator comes on for about 6 seconds and
then goes off.
Does the SBS indicator stay on?
YES-Go to step 3.
NO- Intermittent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures {seepage 23-26).
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect the front passenger's seat belt
tensioner 2P connector (A) from the floor wire
harness.
07TAZ-525011A
5. Connect the SRS inflator simulator (2 0 connector)
and simulator lead C to the floor wire harness.

sRs
DTC Troubleshooting (cont'd)
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.
ls DTC 4-4 indicated?
YES Go to step 9.
NO-Short to power in the front passenger's seat
belt tensioner; replace the front passenger's seat
belt (see page 23-4).I
9. Turn the ignition switch OFF. Disconnect the
battery negative cable. and wait for 3 minutes.
'10. Disconnect floor wire harness 4P connector
C403 (A)from dashboard wire harness B.
07sAz-TB4o11A
Connect the SRS inflator simulator (2 0
connectors) and simulator lead F to dashboard wire
harness B.
Reconnect the battery negative cable.
Erase the DTC memory.
Read the DTC.
ls DTC 4-4 indicated?
YES-Go to step 15.
NO- Short to power in the floor wire harness;
replace the floor wire harness.l
11.
tJ.
14.
23-62
11.
15.
to.
18.
19.
20.
21.
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect the driver's airbag connector (see step
2 on page 23-211, tront passenger's airbag
connector (see step 3 on page 23-21), and drivefs
seat belt tensioner connector (see step 5 on page
23-22t.
Disconnect SRS unit connector A ('l8P) trom the
SRS unit (see step 7 on page 23-22).
Disconnect the special tool from dashboard wire
harness B.
Reconnect the battery negative cable.
Turn the ignition switch ON (ll).
Check for voltage between the No. 9 terminal of
SRS unit connector A (18P) and body ground, and
the No. 18 terminal and body ground. There should
be 0.5 V or less.
SRS UNIT CONNECTOR A (18PI
Wire side oJ Jemale terminals
Is the voltage as specified?
YES Faulty SRS unit; replace the SRS unit (see
page 23'1221.a
NO Shortto power in dashboard wire harness B;
replace dashboard wire harness B.l
t'J
J

sRs
DTC Troubleshooting (cont'dl
16. Disconnect the driver's airbag connector (see step
2 on page 23-21), front passenger's airbag
connector (see step 3 on page 23-21). and driver's
seat belt tensioner connector (see step 5 on page
23-22).
17. Disconnect SRS unit connector A (18P)from the
SRS unit (see step 7 on page 23-221.
18. Disconnect the specialtool from dashboard wire
harness B.
19. Check resistance between the No.9 terminal of
SRS unit connector A (18P) and body ground, and
the No. l8 terminal and body ground. There should
be an open circuit. or at least 1 M Q.
SRS UNIT CONNECTOR A {18P)
wire side of lemale terminals
ls the rcsistance as specified?
YES Faulty SRS uniU replace the SRS unit (see
page 23-1221.1
NO-Short to ground in dashboard wire harness B;
replace dashboard wire harness B.I
23-64
DTC 22-1: Open or Increased Resistance in
Front Passenger's Seat Belt Buckle Tensioner
Special Tools Required. SRS inflator simulator 07SAZ-T84011A. SRS simulator lead F 07XAZ-S230100
1 . Erase the DTC memory (see page 23-261.
2. Turn the ignition switch ON (ll), and check that the
SRS indicator comes on for about 6 seconds and
then goes otf.
Does the SRS indicator stay on?
YES-Go to step 3.
NO-lntermittent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures (see
page 23-26).
3. Turn the ignition switch oFF. Disconnect the
battery negative cable, and wait for 3 minutes.
4. Disconnectthe front passenger's seat belt buckle
tensioner 4P connector (A) from the floor wire
harness.
5. Connect the SRS inflator simulator (2 Q
connectors) and the simulator lead F to the floor
wtre harness.
\,

t
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.
ls DTC 22-4 indicated?
YES Go to step g.
NO-Short to power in the front passenger,s seatbelt buckle tensioner; replace the front passenger,s
seat belt buckle. !
9. Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes,
10.Disconnect both side airbag 2P connectors (see
step 4 on page 23-21)and the driver's seat beltbuckle tensioner 4P connector (see step 6 on page,1_r'>\
Disconnect SRS unit connector B (18P) from theSRS unit (see step 7 on page 23-221.
Disconnect the special tool from the floor wireharness.
Reconnect the battery negative cable.
Turn the ignition switch ON (ll).
Check for voltage between the No. 2 terminal ofSRS unit connector B {18P) and body ground, andthe No. 11 terminal and body ground. There shouldbe 0.5 V or Iess.
SRS UNIT CONNECTOR B I18P)
ls the voltage as specified?
YES-Faulty SRS unit; replace the SRS unit (see
page 23-1221 .l
NO Short to power in the floor wire harness;
replace the floor wire harness.l
11.
't2.
t5.
14.
23-67

sRs
DTC Troubleshooting (cont'dl
DTC 22-5: Short to Ground in Front
Passenger's Seat Belt Buckle Tensioner
Special Tools Required. SRS inflator simulator 07SAZ-T84011A. SRS simulator lead F 07XAZ-S230100
1 . Erase the 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 off.
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 23-26).
3. Turn the ignition switch OFF. Disconnectthe
battery negative cable, and wait for 3 minutes.
4. Disconnectthe front passenger's seat belt buckle
tensioner 4P connector (A) from the floor wire
harness,
Connect the SRS inflator simulator (2 Q
connectors) and simulator lead F to the floor wire
narness.
Reconnect the battery negative cable.
Erase the DTC memory.
5.
6.
1.
23-68
!U
8. Read the DTC.
ls DTC 22-5 indicated?
YES-Go to step 9.
NO Short to ground in the front passenger's seat
belt buckle tensioner; replace the front passenger's
seat belt buckle.l
9. Turn the ignition switch OFF. Disconnectthe
battery negative cable, and wait for 3 minutes.
10. Disconnect both side airbag 2P connectors (see
step 4 on page 23-21) and the driver's seat belt
buckle tensioner 4P connector (see step 6 on page
23-22t.
11. Disconnect SRS unit connector B (18Plfrom the
SRS unit (see step 7 on page 23-221.
12. Disconnect the special tool from the floor wire
harness,
13. Check resistance between the No. 2 terminal of
SRS unit connector B (18P) and body ground, and
the No, 11 terminal and body ground. There should
be an open circuit, or at least 1 M Q.
SRS UNIT CONNECTOR g {18PI
ls the resistance as specified?
YES-Faulty SRS unit; replace the SRS unit (see
page 23-1221 .a
NO Short to ground in the floor wire harness;
replace the floor wire harness.l
bU
Wire side of female terminals

I
g]
3
1 1. Check resistance between the No. 2 terminal of the
floor wire harness 3P connector and body ground.
There should be an open circuit. or at least 1 fvl Q ,
FLOOR WIRE HARNESS 3P CONNECTOR
Wire side ot temale terminals
ls the resistance as specified?
YES-Go to step 12.
NO Short to ground in the floor wire harness or
multiplex control unit. Replace the faulty harness or
part.I
Check resistance between the No. 3 terminal of the
floor wire harness 3P connector and body ground.
There should be an open circuit, or at least 1 M Q.
FLOOR WIRE HARNESS 3P CONNECTOR
LT GRN
Wire side of female terminals
ls the resistance as specified?
YES Go to step 13.
NO-Short to ground in the floor wire
replace the floor wire harness.I
12.
13. Check resistance between the No. 8 terminal of
SRS unit connector C (8P) and the No. 3 terminal of
the floor wire harness 3P connector. There should
be0 1Q.
FLOORWIRE HARNESS SRS UNITCONNECTORC I8P}3P CONNECTOB
Wire side of female terminals
ls the resistance as specitied?
YES Go to step 14.
NO Open in the floor wire harness; replace the
floor wire harness.l
Check resistance between the No. 4 terminal of
SRS unit connector C (8P) and the No. 2 terminal of
the floor wire harness 3P connector. There should
be0-1 0.
14.
FLOOR WIRE HARNESS3P CONNECTORSRS UNIT CONNECTOR C IsPI
Wire side of female terminals
ls the resistance as specified?
YES Replace the SRS unit (see page 23-122).1
NO Open in the floor wire harness or multiplex
control unit, or poor connection at the floor wire
harness, the under-dash fuse/relay box, and the
multiplex control unit. Check the connection at the
floor wire harness, the under-dash fuse/relay box,
and the multiplex control unit. lf the connection is
OK, replace the faulty harness or part.l
harness;
23-73

7. Unbuckle the front passenger's seat belt.
Check resistance between the No. 1 and No. 2
terminals of the front passenger's seat belt buckle
switch 3P connector. There should be 0 1!).
Check resistance between the No. 1 and No. 3
terminals of the same connector. There should be
an oDen circuit, or at least 1 M Q
FRONT PASSENGER'S SEAT BELTBUCKLE SWITCH 3P CONNECTOR
Terminal side of male terminals
Terminal side of male terminals
ls the resistance as specilied?
YES Go to step 8.
NO-Replace the front passenger's seat belt buckle
assembly, then clear the DTC.I
9.
10.
8. Check resistance between the No. 1 terminal ofthe
floor wire harness 3P connector and body ground.
There should be 0 1Q.
FLOOR WIRE HARNESS 3P CONNECTOR
Wire side of female terminals
ls the tesistance as specified?
YES Go to step 9.
NO-Open in the floor wire harness or poor ground
connection at G551. lf G551 is OK, replace the floor
wire harness.I
Disconnect the negative cable from the battery,
Disconnect SRS unit connector C (8P) from the SRS
unit (see step 7 on page 23-22).
(cont'd)
23-75

sRs
DTC Troubleshooting (cont'dl
11. Check resistance between the No.2 terminal ofthe
floor wire harness 3P connector and body ground.
There should be an open circuit, or at least 1 M 0 .
FLOOR WIRE HARNESS 3P CONNECTOR
Wire side of female terminals
ls the resistance as specified?
YES-Go to step 12.
NO-Short to ground in the floor wire harness;
replace the floor wire harness.I
Check resistance between the No. 3 terminal of the
floor wire harness 3P connector and body ground.
There should be an open circuit, or at least 1 l\4 0 .
FLOOR WIRE HABNESS 3P CONNECTOR
Wire side of temale terminals
ls the resistance as specified?
YES-Go to step 13.
NO Short to ground in the floor wire harness;
replace the floor wire harness.I
23-76
\J
13. Check resistance between the No. 7 terminal of
SRS unit connector C (8P) and the No. 3 terminal of
the floor wire harness 3P connector.
There should be 0-1 Q.
FLOORWIRE HARNESS SRS UNITCONNECTOR C (8P)3P CONNECTOR
Wire side of female terminals
ls the tesistance as specified?
YES-Go to step 14.
NO Open in the floor wire harness; replace the
floor wire harness.I
Check resistance between the No, 3 terminal of
SRS unit connector C (8P) and the No. 2 terminal of
the floor wire harness 3P connectof
There should be 0 1Q.
LJ
14.
FLOOR WIRE HARNESS3P CONNECTORSRS UNIT CONNECTOR C ISPI
Wire side of female terminals
ls the resistance as specified?
YES Replace the SRS unit (see page 23-122).1
NO Open ln the floor wlre harness; replacethe
floor wire harness.l

sRs
DTC Troubleshooting (cont'dl
13. Check voltage between the No. 10 terminal of SRS
unit connector A (18P) and body ground. There
shouid be 'l V or less.
SRS UNIT CONNECTOR A {,I8P)
12378I
101112l3t4151611t6
RED
Wire side oI female terminals
ls the voltage as specitied?
YES-Go to step 14.
NO-Short to power in the engine compartment
wire harness or dashboard wire harness B; replace
the faulty harness.l
Turn the ignition switch OFF.
Connect the SRS inflator simulator (jumper
connector) and simulator lead H to the engine
compartment wire harness 2P connector (A).
07YAZ-S3AA100
07SAZ-TB,O11A
14.
t5.
23-78
\."r1
16. Check resistance between the No. 10 and No. 11
terminals of SRS unit connector A (18P). There
should be 1 0 or less.
SRS UNIT CONNECTOR A Il8PI
Wire side of female terminals
ls the rcsistance as specified?
YES Faulty left front impact sensor or SRS unit;
replace the left front impact sensor (see page 23-125).
lf the problem is still present, replace the SRS unit(see page 23-122).1
NO-Poor connection at C401, faulty engine
compartment wire harness, or faulty dashboard
wire harness B. Inspect C401. lf it is OK, replace the
faulty harness.l
= \y,