DTC Troubleshooting: 42-1x
DTC 42-1x (‘‘x'' can be 0 thru 9 or A thru F):
No Signal From the Right Front Impact Sensor
NOTE:
  • Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.
  • Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software and retest.
  1. Clear the DTC memory.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
  1. Read the DTC.
Is DTC 42-1x indicated?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.
  1. Turn the ignition switch to LOCK (0).
  1. Do the battery terminal disconnection procedure, then wait for 3 minutes.
  1. Check the connections between SRS unit connector A (39P) and the SRS unit, between the right engine compartment wire harness 2P connector and the right front impact sensor, and at right engine compartment wire harness 4P connector.
Are the connections OK?
YES -
Go to Step 7 .
NO -
Repair the poor connections and retest.
  1. Disconnect SRS unit connector A (39P) from the SRS unit.
  1. Connect an SRS short canceller (070AZ-SAA0100) to the No. 38 and the No. 39 terminals of SRS unit connector A (39P).
  1. Disconnect the right engine compartment wire harness 2P connector from the right front impact sensor.
  1. Measure the resistance between the No. 38 and the No. 39 terminals of SRS unit connector A (39P). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 11 .
NO -
Short in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.■