DTC Troubleshooting: 76-3x
DTC 76-3x (‘‘x'' can be 0 thru 9 or A thru F):
Faulty F-CAN communication or Internal Failure of E-pretensioner Unit (K24Z3 engine)
NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.
  1. Turn the ignition switch to LOCK (0), and wait for 10 seconds.
  1. Turn the ignition switch to ON (II), and wait for 10 seconds.
Is DTC 76-3x indicated?
YES -
Go to Step 5 .
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. Turn the ignition switch to ON (II), and check that the ACC indicator comes on and then goes off.
Does the ACC indicator go off?
YES -
Go to Step 7 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II), and check that the VSA indicator comes on and then goes off.
Does the VSA indicator go off?
YES -
Go to Step 9 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II), and check that the ECM/PCM indicator comes on and then goes off.
Does the ECM/PCM indicator go off?
YES -
Go to Step 11 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Check continuity between No. 3 terminal of E-pretensioner unit 14P connector and the No. 10 terminal of ACC unit connector (20P), and between the No. 5 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 20 terminal of ACC unit connector (20P).
Is there continuity?
YES -
Go to Step 15 .
NO -
Open between the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and ACC unit connector (20P).■
  1. Measure the resistance between No. 3 and No. 5 terminals of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 16 .
NO -
Short in the dashboard wire harness, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Measure the resistance between No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and body ground, and between the No. 5 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 17 .
NO -
Short to ground in the dashboard wire harness, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Check continuity between the No. 3 terminal of E-pretensioner unit 14P connector and the No. 12 terminal of VSA modulator-control unit 47P connector, and between the No. 5 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 13 terminal of VSA modulator-control unit 47P connector.
Is there continuity?
YES -
Go to Step 19 .
NO -
Open between the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and VSA modulator-control unit 47P connector.■
  1. Measure the resistance between the No. 3 and No. 5 terminals of left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 20 .
NO -
Short in the right engine compartment wire harness, the dashboard wire harness, left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Measure the resistance between No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and body ground, and between the No. 5 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 21 .
NO -
Short to ground in the right engine compartment wire harness, dashboard wire harness, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Check continuity between the No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 3 terminal of ECM/PCM connector A (49P), and between the No. 5 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 4 terminal of ECM/PCM connector A (49P).
Is there continuity?
YES -
Go to Step 23 .
NO -
Open between the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and ECM/PCM connector A (49P).■
  1. Measure the resistance between the No. 3 and No. 5 terminals of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 24 .
NO -
Short in the left engine compartment wire harness, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Measure the resistance between No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and body ground, and between the No. 5 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 25 .
NO -
Short to ground in the left engine compartment wire, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Check continuity between the No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 16 terminal of SRS unit connector A (39P), and between the No. 5 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner unit 14P connector (RHD models) and the No. 17 terminal of SRS unit connector A (39P).
Is there continuity?
YES -
Go to Step 27 .
NO -
Open between the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and the SRS unit connector A (39P).■
  1. Measure the resistance between No. 3 and No. 5 terminals of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Go to Step 28 .
NO -
Short in the dashboard wire harness, the left engine compartment subharness (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■
  1. Measure the resistance between No. 3 terminal of the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness 14P connector (RHD models) and body ground, and between the No. 5 terminal and body ground. There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Replace the E-pretensioner unit.■
NO -
Short to ground in the dashboard wire harness, the left engine compartment subharness 14P connector (LHD models) or E-pretensioner subharness (RHD models); replace the faulty harness.■