LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 1999 >> Vitara JS, 4D Utility, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1500: Engine Start Signal Circuit Malfunction >> Diagnosis & Repair Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 1999 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove PCM cover, located below right side of instrument panel. Connect DVOM between ground and PCM 28-pin connector "D" terminal No. 26 (Black/Yellow wire). Start engine and observe voltage reading. If 0-1 volt exists, leave DVOM connected and go to next step. If 0-1 volt does not exist, repair short to power in Black/Yellow wire. See WIRING DIAGRAMS article. Retest system.
  2. Stop engine. With DVOM still connected between ground and PCM 28-pin connector "D" terminal No. 26 (Black/Yellow wire), crank engine and observe voltage reading. If 6-14 volts does not exist, check for open in Black/Yellow wire. See WIRING DIAGRAMS article. Repair as necessary and retest system. If Black/Yellow wire is okay, go to next step. If 6-14 volts exists, check for intermittent problem. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If all checks are okay, go to next step.
  3. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION article. Retest system.
scientia non olet · About LEMON Manuals