SRS DTC Troubleshooting: 43-1x
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
  1. Turn the ignition switch ON (II), and wait for 10 seconds.
Is DTC 43-11 indicated?
YES -
Go to Step 6 .
NO -
Go to Step 4 .
  1. Read the DTC.
Is DTC 43-12 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If DTC 43-1x except DTC 43-11 and 43-12 is indicated, faulty left side impact sensor (first); replace the left side impact sensor (first).
  1. Read the DTC.
Is DTC 45-11 also indicated?
YES -
Faulty left side impact sensor (first); replace the left side impact sensor (first). ■
NO -
Go to Step 6 .
  1. Turn the ignition switch OFF.
  1. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Check resistance between the No. 25 and No. 26 terminals of SRS unit connector B (28P). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 12 .
NO -
Short in the floor wire harness; replace the floor wire harness.■
  1. Check resistance between the No. 25 terminal of SRS unit connector B (28P) and body ground, and between the No. 26 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 13 .
NO -
Short to ground in the floor wire harness; replace the floor wire harness.■
  1. Reconnect the negative cable to the battery.
  1. Turn the ignition switch ON (II).
  1. Check for voltage between the No. 25 terminal of SRS unit connector B (28P) and body ground, and between the No. 26 terminal and body ground. There should be 1 V or less.
Is the voltage as specified?
YES -
Go to Step 16 .
NO -
Short to power in the floor wire harness; replace the floor wire harness.■
  1. Turn the ignition switch OFF.
  1. Connect the SRS inflator simulator (jumper connector) and the black lead (A) of simulator lead L to the floor wire harness 4P connector (B).
  1. Check resistance between the No. 25 and No. 26 terminals of SRS unit connector B (28P). There should be 0−1.0 Ω.
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 in the floor wire harness; replace the floor wire harness.■