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SRS 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:
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
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. 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. 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.■

  1. Measure the resistance between the No. 38 terminal of SRS unit connector A (39P) and body ground, and between the No. 39 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 12 .
NO -
Short to ground in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.■
  1. Turn the ignition switch to ON (II).

  1. Measure the voltage between the No. 38 terminal of SRS unit connector A (39P) and body ground, and between the No. 39 terminal and body ground. There should be less than 1 V.
Is the voltage as specified?
YES -
Go to Step 15 .
NO -
Short to power in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.■
  1. Turn the ignition switch to LOCK (0).

  1. Install a jumper wire between the No. 1 and the No. 2 terminals of right engine compartment wire harness 2P connector.

  1. Measure the resistance between the No. 38 and the No. 39 terminals of SRS unit connector A (39P). There should be less than 1 Ω.
Is the resistance as specified?
YES -
Go to Step 19 .
NO -
Open in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.■
  1. Substitute a known-good right front impact sensor and recheck.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
Is DTC 42-1x indicated?
YES -
NO -