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Home >> Toyota >> 1996 >> Tercel Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P1500 - Starter Signal Circuit Malfunction >> Diagnosis & Repair
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Diagnosis & Repair

  1. Connect Toyota scan tester. See Figure. Turn ignition and scan tester on. Using scan tester, read STA signal. Turn ignition switch to START position and release.
  2. STA signal should be OFF with ignition switch in ON position. STA signal should be ON with ignition switch in START position. If STA signal is not as specified, go to next step. If STA signal is as specified, inspect all applicable connectors. See appropriate wiring diagram in WIRING DIAGRAMS article. Malfunction may be intermittent.
  3. Check for an open in wiring harness between starter relay and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. If circuit is okay, replace ECM and retest.
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