Honda Civic. Manual — part 56

13. Measure the resistance between the No. 9 terminal of SRS unit connector B

(28P) and body ground, and the No. 10 terminal and body ground. There
should be an open circuit or at least 1 M ohms.

Fig. 121: Measuring Resistance Between No. 9 Terminal Of SRS Unit
Connector B (28P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Faulty SRS unit or poor connection at SRS unit connector B (28P) and
the SRS unit. Check the connection; if the connection is OK, replace the SRS
unit (see SRS UNIT REPLACEMENT).

NO -Short to ground in the floor wire harness; replace the floor wire harness.

DTC 31-1X ("X" CAN BE 0 THRU 9 OR A THRU F): OPEN IN DRIVER'S SIDE AIRBAG
INFLATOR

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead L 070AZ-SNAA300

NOTE:

Before doing this troubleshooting procedure, review SRS
Precautions and Procedures (see PRECAUTIONS AND
PROCEDURES) and General Troubleshooting Information
(see GENERAL TROUBLESHOOTING INFORMATION).

2008 Honda Civic EX

2006-08 RESTRAINTS SRS (Supplemental Restraint System) - Civic (Except Hybrid)

1. Clear the DTC memory (see CLEAR THE DTC MEMORY WITH THE

HDS).

2. Turn the ignition switch ON (II), and check that the SRS indicator comes on

for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 31-1x indicated?

YES -Go to step 3.

NO -Intermittent failure, system is OK at this time. Go to
TROUBLESHOOTING INTERMITTENT FAILURES. If another DTC is
indicated, troubleshoot the DTC.

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery,

then wait for 3 minutes.

4. Disconnect the floor wire harness 2P connector (A) from the driver's side

airbag (B).

Fig. 122: Identifying Floor Wire Harness 2P Connector And Driver's Side
Airbag
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Connect the SRS inflator simulator (2 ohms connectors) and simulator lead L

to the floor wire harness.

6. Reconnect the negative cable to the battery.
7. Clear the DTC memory.

2008 Honda Civic EX

2006-08 RESTRAINTS SRS (Supplemental Restraint System) - Civic (Except Hybrid)

8. Read the DTC (see CLEAR THE DTC MEMORY WITH THE HDS).

Is DTC 31-1x indicated?

YES -Go to step 9.

NO -Open in the driver's side airbag inflator; replace the driver's side airbag
(see SIDE AIRBAG REPLACEMENT).

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery,

then wait for 3 minutes.

10. Disconnect both seat belt tensioner 4P connectors (see step7

DISCONNECTING SYSTEM CONNECTORS) and both seat belt buckle
tensioner 4P connectors (see step 8 DISCONNECTING SYSTEM
CONNECTORS).

11. Disconnect SRS unit connector B (28P) from the SRS unit (see step 9

DISCONNECTING SYSTEM CONNECTORS).

12. Disconnect the SRS inflator simulator from SRS simulator lead. Do not

disconnect the simulator lead from the floor wire harness 2P connector.

13. Measure the resistance between the terminals of the black SRS simulator lead

(A). There should be 1.0 ohms or less.

Fig. 123: Identifying Floor Wire Harness 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

2008 Honda Civic EX

2006-08 RESTRAINTS SRS (Supplemental Restraint System) - Civic (Except Hybrid)

YES -Faulty SRS unit or poor connection at SRS unit connector B (28P) and
the SRS unit. Check the connection; if the connection is OK, replace the SRS
unit (see SRS UNIT REPLACEMENT).

NO -Open in the floor wire harness; replace the floor wire harness.

DTC 31-3X ("X" CAN BE 0 THRU 9 OR A THRU F): SHORT TO ANOTHER WIRE OR
DECREASED RESISTANCE IN DRIVER'S SIDE AIRBAG INFLATOR

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead L 070AZ-SNAA300

SRS short canceller 070AZ-SAA0100

1. Clear the DTC memory (see CLEAR THE DTC MEMORY WITH THE

HDS).

2. Turn the ignition switch ON (II), and check that the SRS indicator comes on

for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 31-3x indicated?

YES -Go to step 3.

NO -Intermittent failure, system is OK at this time. Go to
TROUBLESHOOTING INTERMITTENT FAILURES. If another DTC is
indicated, troubleshoot the DTC.

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery,

then wait for 3 minutes.

4. Disconnect the floor wire harness 2P connector (A) from the driver's side

airbag (B).

NOTE:

Before doing this troubleshooting procedure, review SRS
Precautions and Procedures (see PRECAUTIONS AND
PROCEDURES) and General Troubleshooting Information
(see GENERAL TROUBLESHOOTING INFORMATION).

2008 Honda Civic EX

2006-08 RESTRAINTS SRS (Supplemental Restraint System) - Civic (Except Hybrid)