Honda Civic. Manual — part 25

Fig. 29: Identifying Floor Wire Harness 2P Connectors
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Seat Belt Tensioner

7. Remove the seat belt lower anchor (see FRONT SEAT BELT

REPLACEMENT ). Disconnect both floor wire harness 4P connectors (A)
from the seat belt tensioners.

Fig. 30: Identifying Floor Wire Harness 4P Connectors
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Seat Belt Buckle Tensioner

8. Disconnect both floor wire harness 4P connectors (A) from the seat belt buckle

tensioner.

2008 Honda Civic EX

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

Fig. 31: Identifying Floor Wire Harness 4P Connectors
Courtesy of AMERICAN HONDA MOTOR CO., INC.

SRS Unit

9. Disconnect both seat belt tensioner connectors and both seat belt buckle

tensioner connectors. Remove the center console (see CENTER CONSOLE
REMOVAL/INSTALLATION ). Disconnect SRS unit connector A (28P)
and SRS unit connector B (28P) from the SRS unit.

Fig. 32: Identifying SRS Unit Connector A (28P) And SRS Unit Connector
B (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

GENERAL TROUBLESHOOTING INFORMATION

DTC (DIAGNOSTIC TROUBLE CODES)

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.

2008 Honda Civic EX

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

When you turn the ignition switch ON (II), the SRS indicator comes on. If it
goes off after 6 seconds, the system is normal, and is not currently detecting
any abnormality.

If there is an abnormality, the system 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.

The data is stored in memory as a diagnostic trouble code (DTC).

The "x" at the end of each DTC denotes a numeric character (0 thru 9) or an
alpha character (A thru F) that is display on the HDS.

DTCs are either latching or resetting depending on the malfunction. With
resetting DTCs, the SRS indicator will go off the next time the ignition switch
is turned ON and the system is normal, but the DTC is still stored. With
latching DTCs, the SRS indicator will not turn OFF until the malfunction is
repaired and the DTC is cleared.

When you connect the HDS to the data link connector (DLC), you can retrieve
a more detailed DTC in the Honda Systems "SRS" menu.

After reading and recording the DTC, proceed with the troubleshooting
procedure for that code.

Precautions

Use only a digital multimeter to check the system. If it's not a Honda
multimeter, make sure its output is 10 mA (0.01 A) 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 (II), or has been turned OFF for less than 3
minutes, be careful not to bump the SRS unit; the airbags could accidentally
deploy and cause damage or injuries.

NOTE:

Only read DTCs from the SRS menu, not from the SWS
menu. SWS (ODS unit) DTCs are subcode of SRS unit
DTCs. Only troubleshoot the corresponding SRS DTCs.

2008 Honda Civic EX

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

Before you remove the dashboard wire harness, floor wire harness, disconnect
the driver's airbag connector, the front passenger's airbag connector, both side
airbag connectors, both side curtain airbag connectors, both seat belt buckle
tensioner connectors and both seat belt tensioner connectors.

Make sure the battery is fully charged. If the battery is dead or low, measuring
values may not be correct.

Do not touch a tester probe to the terminals in the SRS unit or harness
connectors, and do not connect the SRS unit terminals or the sensor terminals
with a jumper wire. Use only the backprobe set and the multimeter. Backprobe
spring-loaded lock type connectors correctly.

READING THE DTC

1. Make sure the ignition switch is OFF.
2. Connect the HDS to the data link connector (DLC) (A).

Fig. 33: Identifying Data Link Connector (DLC)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does

not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT
TROUBLESHOOTING ).

5. Use the HDS to check for DTCs.

2008 Honda Civic EX

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