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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 269 (Air Bag Restraint Systems) >> Diagnostic Tests >> Diagnostic Trouble Codes (DTCS) Cannot Be Displayed, Or DTCS Are Displayed Without Data Link Connector (DLC) Connection >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Access air bag sensor assembly and disconnect harness connectors. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. Measure resistance between DLC connector terminal No. 13 and harness side of air bag sensor assembly connector A31, terminal No. 15 (Pink/Black wire, circuit TC). See Figure & Figure . If resistance is less than one ohm, go to next step. If resistance is more than one ohm, repair or replace wire harness between DLC and air bag sensor assembly.
  2. Measure resistance between ground and DLC connector terminal No. 4. If resistance is less than one ohm, go to next step. If resistance is more than one ohm, repair or replace wire harness between DLC and body ground.
  3. Measure resistance between ground and harness side of air bag sensor assembly connector A31, terminal No. 15. If resistance is more than one megohm, replace air bag sensor assembly. If resistance is less than one megohm, repair or replace appropriate wire harness, replace appropriate electronic control unit.
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