DTC Troubleshooting: 43-1x

DTC 43-1x (43-10 to 43-19, 43-1A to 43-1F): No Signal from the Left Side Impact Sensor (first) Special Tools Required SRS inflator simulator 07SAZ-TB4011A
SRS simulator lead H
07YAZ-S3A0100

1. Erase the DTC memory.

1. 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, go to the DTC troubleshooting index for troubleshooting details.

1. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.

1. 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 | - | Replace the left side impact sensor (first) and/or the floor wire harness, as needed.■

1. Disconnect both seat belt tensioner 4P connectors (A).

1. Disconnect the floor wire harness 2P connector (A) from the left side impact sensor (first).

1. Connect the SRS inflator simulator (jumper connector) and simulator lead H to the floor wire harness.

1. Disconnect SRS unit connector B (28P) from the SRS unit.

1. Check resistance between the No. 19 and No. 20 terminals of SRS unit connector B (28P). There should be 1.0 Ω or less.

Is the resistance as specified?

YES | - | Faulty left side impact sensor (first) or SRS unit; replace the left side impact sensor (first). If the problem is still present, replace the SRS unit. ■
NO | - | Open or increased resistance in the floor wire harness; replace the floor wire harness.■