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Home >> Suzuki >> 2002 >> Grand Vitara JLS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1500: Starter Signal Circuit Malfunction >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST  . If DTC P1500 is set, go to next step. If DTC P1500 is not set, problem is intermittent. System is okay at this time. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  2. Backprobing, measure voltage between ground and ECM (PCM) 28-pin connector C51-2 terminal No. 26 (Black/Yellow wire). See Figure . Start engine. If 0-1 volt exists, go to next step. If 0-1 volt does not exist, check for short to power in Black/Yellow wire between ignition switch and ECM (PCM) 28-pin connector C51-2. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary and go to DTC CONFIRMATION TEST  .
  3. Turn ignition off. Backprobing, measure voltage between ground and ECM (PCM) 28-pin connector C51-2 terminal No. 26 (Black/Yellow wire). See Figure . Crank engine. If 6-14 volts do not exist, go to next step. If 6-14 volts exist, problem is intermittent. System is okay at this time. See INTERMITTENTS TROUBLE SHOOTING - NO CODES article. If intermittent problem is not found, replace ECM (PCM) and go to DTC CONFIRMATION TEST  .
  4. Check for open in Black/Yellow wire between ignition switch and ECM (PCM) 28-pin connector C51-2. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary and go to DTC CONFIRMATION TEST  . If wire is okay, replace ECM (PCM) and go to DTC CONFIRMATION TEST  .
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