Honda Civic. Manual — part 67

Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Disconnect SRS unit connector A (28P) from the SRS unit (see step 9

DISCONNECTING SYSTEM CONNECTORS).

8. Measure the resistance between the No. 15 and No. 27 terminals of SRS unit

connector A (28P). There should be an open circuit or at least 1 M ohms.

Fig. 155: Measuring Resistance Between No. 15 And No. 27 Terminals Of
SRS Unit Connector A (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Go to step 9.

NO -Short in the engine compartment wire harness or dashboard wire harness;
replace the faulty harness.

9. Measure the resistance between the No. 15 terminal of SRS unit connector A

(28P) and body ground, and between the No. 27 terminal and body ground.
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)

Fig. 156: Measuring Resistance Between No. 15 Terminal Of SRS Unit
Connector A (28P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Go to step 10.

NO -Short to ground in the dashboard wire harness or the engine compartment
wire harness; replace the faulty harness.

10. Reconnect the negative cable to the battery.
11. Turn the ignition switch ON (II).
12. Measure the voltage between the No. 15 terminal of SRS unit connector A

(28P) and body ground, and between the No. 27 terminal and body ground.
There should be 1 V or less.

Fig. 157: Measuring Voltage Between No. 15 Terminal Of SRS Unit
Connector A (28P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic EX

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

Is the voltage as specified?

YES -Go to step 13.

NO -Short to power in the engine compartment wire harness or the dashboard
wire harness; replace the faulty harness.

13. Turn the ignition switch OFF.
14. Connect the SRS inflator simulator (jumper connector) and the black lead (A)

of simulator lead L to the engine compartment wire harness 2P connector (B).

Fig. 158: Identifying Engine Compartment Wire Harness 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

15. Measure the resistance between the No. 15 and No. 27 terminals of SRS unit

connector A (28P). There should be 0-1.0 ohms.

Fig. 159: Measuring Resistance Between No. 15 And No. 27 Terminals Of
SRS Unit Connector A (28P)

2008 Honda Civic EX

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Faulty left front impact sensor or SRS unit-replace the left front impact
sensor (see FRONT IMPACT SENSOR REPLACEMENT). If the problem
is still present, replace the SRS unit (see SRS UNIT REPLACEMENT).

NO -Poor connection at C203, open in the engine compartment wire harness,
or open in the dashboard wire harness. Inspect C203 CONNECTOR TO
HARNESS INDEX . If it is OK, replace the faulty harness.

DTC 42-1X ("X" CAN BE 0 THRU 9 OR A THRU F): NO SIGNAL FROM THE RIGHT FRONT
IMPACT SENSOR

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead L 070AZ-SNAA300

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 42-1x 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.

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)