2003 HONDA CIVIC Ignition switch

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17.
Oisconnect the driver's airbag connector (see step
2 on page 23-21), f ront passenger's airbag
connector (see step 3 on page 23-21), andfront
passenger's seat belt tensioner connector (see step
5 on page 23-22).
Disconnect SRS unit connector A (18P) from the
SRS unit (see step 7 on page 23-22). Do not
disconnect the special tool from dashboard wire
harness B.
Check resistance between the No.8 terminal and
the No. 17 terminal of SRS unit connector A (18P).
There should be 2.0-3.0 Q.
SRS UNIT CONNECTOR A (18P)
RED/WHT
i-4\lel a;
Ea
23561
101l1Zt3t516
RED/BLU
Wire side of female terminals
ls the resistance as specitied?
YES Faulty SRS unit or poor contact at SRS unit
connector A (18P) and the SRS unit. Check the
connection; if the connection is OK, replace the
SRS unit (see page 23-'1221.a
NO Open or increased resistance in dashboard
wire harness B; replace dashboard wire harness
B,t
18.
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]
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to.DTC 3-3: Short to Another Wire or Decreased
Resistance in Driver's Seat Belt Tensioner
SpecialTools Required. SRS inflator simulator 07SAZ-T8401'1A. SRS simulator lead C 07TM-S25011A. SRS simulator lead F 07XAZ-S230100
1. Erase the DTC memory (see page 23-26).
2. Turn the ignition switch ON (ll), and checkthatthe
SRS indicator comes on for about 6 seconds and
then goes off.
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).
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect the driver's seat belt tensioner 2P
connector (A) from the floor wire harness.
-T84011A
07TAZ-S25011A
5. Connect the SRS inflator simulator (2 0 connector)
and simulator lead C to the floor wire harness.
(cont'd)
23-49

sRs
DTC Troubleshooting (cont'd)
6. Reconnectthe battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.
ls DTC 3-3 indicated?
YES-Go to step L
NO-Shon in the driver's seat belt tensioner;
replace the driver's seat belt (see page 23-4).1
L Turn the ignition switch OFF. Disconnectthe
battery negative cable, and wait for 3 minutes.
10. Disconnect floor wire harness 4P connector C403(A)from dashboard wire harness B.
07sAz-TB4or 1A
Connectthe SRS inflator simulator (2 Q
connectors) and simulator lead F to dashboard wire
harness B.
Reconnect the battery negative cable.
Erase the DTC memory.
Read the DTC.
ls DTC 3-3 indicated?
YES-Go to step 15.
NO Short in the floor wire harness; replace the
floor wire harness.l
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
11.
13.
14.
23-50
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16. Disconnect the driver's airbag connector (see step
2 on page 23-211,lront passenger's airbag
connector (see step 3 on page 23-21), and frontpassenger'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 23-22:,.
18. Disconnect the special tool from dashboard wire
harness B.
19. Check resistance between the No.8 terminal and
the No. 17 terminal of SRS unit connector A ('l8P).
There should be an open circuit, or at least 1 l\4 Q .
SRS UNIT CONNECTOR A I18P)
Wire side of female terminals
ls the resistance as specif ied?
YES Faulty SRS unit; replace the SRS unit (see
page 23-1221.a
NO- Short in dashboard wire harness B; replace
dashboard wire harness B.l
LJ
RED/WHT
RED/BLU

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L
]
DTC 3-4: Short to Power in Driver's Seat Belt
Tensioner
SpecialTools Bequired. SRS lnflator simulator 07SAZ-TB4011A. SRS simulator lead C 07TM-S25011A. 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 off.
Does the SRS indicatot 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 seat belt tensioner 2P
connector (A) from the floorwire harness.
07sAz-T84011A
5. Connect the SRS inflator simulator (2 !J connector)
and simulator lead C to the floor wire harness.
I
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.
Is DTC 3-4 indicated?
YES - Go to step 9.
NO-Short to power in the driver's seat belt
tensioner; replace the driver's seat belt
(see page 23-4).1
L 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.
TB4O11A
Connect the SRS inflator simulator (2 0
connectors) and simlator lead F to dashboard wire
harness B.
Reconnect the battery negative cable.
Erase the DTC memory.
Read the DTC.
ls DTC 3-4 indicated?
YES -- Go to step 15.
NO-Shon to power in the floor wire harness;
replace the floor wire harness.I
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
11.
't2.
14.
(cont'd)
23-51

sRs
DTC Troubleshooting (cont'dl
16. Disconnecl the driver's airbag connector (see step
2 on page 23-21l,Iront passenger's airbag
connector (see step 3 on page 23-2'l), and front
passenger's seat belt tensioner connector (see step
5 on page 23-221 .
17. Disconnect SRS unit connector A (l8P)from the
SRS unit (see step 7 on page 23-22).
18. Disconnect the specialtool from dashboard wire
harness B.
19. Reconnect the battery negative cable.
20. Turn the ignition switch ON (ll),
21. Check for voltage between the No. 8 terminal of
SRS unit connector A (18P) and body ground, and
the No. 17 terminal and body ground. There should
be 0.5 V or less.
SRS UNIT CONNECTOR A {18PI
ls the voltage as specified?
YES-Faulty SRS unit; replace the SRS unit {seepage 23-122], .a
NO Shortto power in dashboard wire harness B;
replace dashboard wire harness B.l
23-52
LJ
DTC 3-5: Short to Ground in Driver's Seat Belt
Tensioner
Special Tools Required. sRS inflalor simularor 07sAz-TB4011A. SRS simulator lead C 07TAZ-S25011A. 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. Disconnect the
battery negative cable, and wait for 3 minutes.
4, Disconnect the driver's seat belt tensioner 2P
connector (A) from the floor wire harness,
-T84011A
07TAZ-S25011A
L
5. Connect the SRS inflator simulator (2 Q conneclor)
and simulator lead C to the floor wire harness.

t
)
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.
ls DTC 3-5 indicated?
YES-Go to step 9,
NO Shortto ground in the driver's seat belt
tensioner; replace the driver'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-T84011A
Connect the SRS inflator simulator (2 Q
connectors) and simulator lead F to dashboard wire
harness B.
Reconnect the battery negative cable.
Erase the DTC memory.
Read the DTC.
ls DTC 3-5 ind icated?
YES Go to step 15.
NO-Short to ground in the floor wire harness;
replace the floor wire harness.l
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
'11.
14.
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23-53
16. Disconnectthe driver's airbag connector (see step
2 on page 23-211,lront passenger's airbag
connector (see step 3 on page 23-21), and front
passenger's seat belt tensioner connector (see step
5 on page 23-22).
17, Disconnect SRS unit connector A ('l8P) from the
SRS unit (see step 7 on page 23-221.
18. Disconnect the specialtoolfrom dashboard wire
harness B.
19. Check resistance between the No. 8 terminal of
SRS unit connector A (18P) and body ground, and
the No. 17 terminal and body ground. There should
be an open circuit, or at least 1 M Q .
SRS UNIT CONNECTOR A (18P)
ls the resistance as specified?
YES-Faulty SRS uniu replace the SRS unit {seepage 23-122l,.a
NO Short to ground in dashboard wire harness B;
replace dashboard wire harness B.l

sRs
DTC Troubleshooting {cont'd)
DTC 21-1: Open or Increased Resistance in
Driver's Seat Belt Buckle Tensioner
Special Tools Required. SRS inflator simulator 07SAZ-TB4011A. SRS simulator lead F 07XAZ-S230100
1. Erasethe 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 off.
Does the SBS indicatot stay on?
YES Go to step 3.
NO-lntermittent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures (see
page 23-261.
3. Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
4. Disconnect the driver's seat belt buckle tensioner
4P connector (A) from the floor wire harness.
5. ConnecttheSRS in{lator simulator (2 Q connectors)
and simulator lead F to the Iloor wire harness.
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
23-54
LJ
8. Read the DTC.
ls DTC 21-1 indicated?
YES Go to step 9.
NO Open or increased resistance in the driver's
seat belt buckle tensioner; replace the driver's seat
belt buckle.I
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 23-2lland the front passenger's
seat belt buckle tensioner 4P connector (see step 6
on page 23-22) .
11. Disconnect SRS unit connector B (18P)from the
SRS unit (see step 7 on page 23'22). Do not
disconnect the special tool from the floor wire
narness.
12. Check resistance between the No. 1 and No. 10
terminals of SRS unit connector B (18P). There
should be 2.0 - 3.0 O.
SRS UNIT CONNECTOR B Il8PI
Wire side of female terminals
ls the resistance as specified?
YES*Faulty SRS unit or poor contact at SRS unit
connector B (18P) and the SRS unit. Check the
connection; if the connection is OK, replace the
SRS unit (see page 23-122).a
NO Open or increased resistance in the floor wire
harness; replace the floor wire harness.l
b/
GRN/YEL
lt''A I'
Y lr0]TI
?tl
3616s
15t617t6
GRN/BLK

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f
DTC 21-3: Short to Another Wire or
Decreased Resistance in Driver's Seat Belt
Euckle Tensioner
Special Tools Required. SRS inflator simulator 07SAZ-T840't1A. 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 lseepage 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.
Connectthe SRS inflator simulator (2 i)
connectors) and simulator lead F to the floor
wtre narness.
Reconnect the battery negative cable.
Erase the DTC memory.
6.
7.
8. Read the DTC.
ls DTC 21-3 ind icated?
YES-Go to step 9.
NO- Short in the driver's seat belt buckle
tensioner; replace the driver'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 front passenger's
seat belt buckle tensioner 4P
connector (see slep 6 on page 23-22).
11. DisconnectSRS unitconnectorB (18P)fromthe
SRS unit {see step 7 on page 23-22l.
'12. Disconnect the specialtool f rom the floor wire
harness.
13. Check resistance between the No. 1 and No. 10
terminals of SRS unit connector B (18P). There
should be an open circuit, or at least 1 M Q.
SRS UNIT CONNECTOR B {18PI
Wire side of female terminals
ls the resistance as specified?
YES Faulty SRS unit; replace the SRS unit (see
page 23-1221.a
NO Short in the floor wire harness; replace the
floor wire harness.l
GRN/YEL
GRN/BLK
23-55

sRs
DTC Troubleshootang (cont'dl
DTG 21-4: Short to Power in Driver's Seat Belt
Buckle Tensioner
SpecialTools Required. SRS inflator simulator 07SAZ-TB4011A. SRS simulator lead F 07XM-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 indicatot stay on?
YES-Go to step 3.
NO Interminent failure, system is OK at this time.
Go to Troubleshooting Intermittent Failures (see
page 23'26).
3. Turn lhe ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
4. Disconnect the driver's seat belt buckle tensioner
4P connector (A) from the floor wrre narness.
Connectthe SRS inflator simulator {2 0
connectors) and the simulator lead F to the f loor
wire harness.
Reconnect the battery negative cable.
Erase the DTC memory.7.
5.
23-56
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L
Read the DTC.
ls DTC 21-4 indicated?
YES Go to step 9.
NO Shon to power 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 23-22) .
10.
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