DTC Troubleshooting: 21-9x
DTC 21-9x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Ground in the Left Side Seat Belt Tensioner
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 21-9x 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. Disconnect SRS unit connector B (39P) from the SRS unit.
  1. Check for continuity between the No. 12 and the No. 13 terminals of SRS unit connector B (39P) and body ground.
Is there continuity?
YES -
Go to Step 8 .
NO -
Faulty SRS unit; replace the SRS unit. ■
  1. Disconnect the SRS floor wire harness 4P connector from the left side seat belt tensioner.