LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2000 >> Vitara JS, 4D Utility, Standard >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Air Bag Restraint Systems >> Diagnostic Tests >> SDM Cannot Communicate Through Serial Data Circuit >> Diagnostic Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedure

  1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
  2. Before continuing with diagnosis, ensure scan tool is operating properly and correct cartridge is installed. Turn ignition switch to OFF position. Ensure scan tool is connected properly to DLC. If connection is okay, go to next step. If connection is not okay, repair as necessary and go to step  5.
  3. Turn ignition switch to ON position. Check scan tool communication with PCM. If communication is okay, go to next step. If communication is not okay, a short to ground exists in Violet/Green or White/Black wire. Replace wiring harness andgo to step  5.
  4. Turn ignition switch to OFF position. Disconnect SDM connector. See Figure. Disconnect harness connector Q02. See Figure. Measure resistance between SDM connector terminal No. 14 and harness connector Q02 terminal No. 5. See Figure. If resistance is one ohm or less, replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step. If resistance is more than one ohm, an open or high resistance exists in White/Black wire. Replace wiring harness and go to next step.
  5. Reconnect all SIR system components. Using scan tool, clear all SIR DTCs. Go to SIR DIAGNOSTIC SYSTEM CHECK .
scientia non olet · About LEMON Manuals