DTC 43-1x ("x" can be 0 thru 9 or A thru F): No Signal From the Left Side Impact Sensor (first)

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A
SRS simulator lead H 07YAZ-S3AA100

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures (see PRECAUTIONS AND PROCEDURES ) and General Troubleshooting Information (see DTC (DIAGNOSTIC TROUBLE CODES) ).

Clear the DTC memory (see CLEAR THE DTC MEMORY WITH THE HDS ).
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 43-1x 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.
Turn the ignition switch OFF. Disconnect the negative cable from the battery, then wait for 3 minutes.
Check the connection between the floor wire harness 2P connector and the left side impact sensor (first).
Is the connection OK?

YES -Go to step 5.

NO -Repair the poor connections and retest. If DTC 43-1x is still present, go to step 5.
Disconnect both seat belt tensioner 4P connectors (see step 6 ).
Disconnect the floor wire harness 2P connector (A) from the left side impact sensor (first).

Fig 1: Identifying Floor Wire Harness 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect SRS unit connector B (28P) from the SRS unit (see step 7 ).
Measure the resistance between the No. 19 and No. 20 terminals of SRS unit connector B (28P). There should be an open circuit or at least 1 M Ω.

Fig 2: Measuring Resistance Between No. 19 And No. 20 Terminals Of SRS Unit Connector B (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Go to step 9.

NO -Short in the floor wire harness; replace the floor wire harness.
Measure the resistance between the No. 19 terminal of SRS unit connector B (28P) and body ground, and between the No. 20 terminal and body ground. There should be an open circuit or at least 1 MΩ.

Fig 3: Measuring Resistance Between No. 19 Terminal Of SRS Unit Connector B (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 floor wire harness; replace the floor wire harness.
Reconnect the negative cable to the battery.
Turn the ignition switch ON (II).
Measure the voltage between the No. 19 terminal of SRS unit connector B (28P) and body ground, and between the No. 20 terminal and body ground. There should be 1 V or less.

Fig 4: Measuring Voltage Between No. 19 Terminal Of SRS Unit Connector B (28P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the voltage as specified?

YES -Go to step 13.

NO -Short to power in the floor wire harness; replace the floor wire harness.
Turn the ignition switch OFF.
Connect the SRS inflator simulator (jumper connector) and simulator lead H to the floor wire harness 2P connector (A).

Fig 5: Identifying Floor Wire Harness 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the resistance between the No. 19 and No. 20 terminals of SRS unit connector B (28P). There should be 1.0 Ω or less.

Fig 6: Measuring Resistance Between No. 19 And No. 20 Terminals Of SRS Unit Connector B (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES -Faulty left side impact sensor (first) or SRS unit; replace the left side impact sensor (first) (see SIDE IMPACT SENSOR (FIRST) REPLACEMENT ). If the problem is still present, replace the SRS unit (see SRS UNIT REPLACEMENT ).

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