Honda Civic. Manual — part 94

voltage. There should be battery voltage when the ignition on.

Fig. 275: Measuring Voltage Between No. 18 Terminal Of SRS Unit
Connector A (28P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

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

NO -Go to step 6.

6. Turn the ignition switch OFF.
7. Disconnect under-dash fuse/relay box connector J (4P).

Fig. 276: Identifying Under-Dash Fuse/Relay Box Connector J (4P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic EX

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

8. Measure the resistance between the No. 1 terminal of the under-dash fuse/relay

box connector J (4P) and the No. 18 terminal of SRS unit connector A (28P).
There should be 0-1.0 ohms.

Fig. 277: Measuring Resistance Between No. 1 Terminal And No. 18
Terminal Of SRS Unit Connector A (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Open in the under-dash fuse/relay box or poor connection between
connector S (4P) and the under-dash fuse/relay box; check the connection. If
the connection is OK, replace the under-dash fuse/relay box (see REMOVAL
AND INSTALLATION ).

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

DTC B2-1X ("X" CAN BE 0 THRU 9 OR A THRU F): NO SIGNAL FROM THE REAR SAFING
SENSOR

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead L 070AZ-SNA0300

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.

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

Does the SRS indicator stays on, and is DTC B2-11 indicated?

YES -Go to step 4.

NO -Go to step 5.

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

Is DTC 45-11 also indicated?

YES -Faulty rear safing sensor; replace the rear safing sensor (see REAR
SAFING SENSOR REPLACEMENT).

NO -Go to step 7.

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

Is DTC B2-1x (except B2-11) also indicated?

YES -Go to step 6.

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

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

Is DTC 45-11 also indicated?

YES -Go to the Troubleshooting, for DTC 45-1X .

NO -Faulty rear safing sensor; replace the rear sating sensor (see REAR

2008 Honda Civic EX

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

SAFING SENSOR REPLACEMENT).

7. Turn the ignition switch OFF.
8. Disconnect the floor wire harness 4P connector (A) from the rear safing sensor.

Fig. 278: Identifying Floor Wire Harness 4P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

9. Disconnect the floor wire harness 4P connector (A) from the left side impact

sensor (first).

Fig. 279: Identifying Floor Wire Harness 4P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

10. Measure the resistance between the No. 2 and No. 3 terminal of the rear safing

sensor 4P connector. There should be an open circuit or at least 1 M ohms.

2008 Honda Civic EX

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