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DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to PRECAUTIONS FOR DTC TROUBLESHOOTING .
DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  Engine start signal check 
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ignition switch to ON position.
  3. Check engine start signal of "Starter SW" under "Data List" displayed on scan tool.
    • Ignition switch is at "START" position: "ON".
    • Ignition switch is at other than "START" position: "OFF".

Does "Starter SW" signal correctly? 		 Intermittent trouble. Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION . Go to Step 3.
3  Engine start signal check 
  1. Disconnect connectors from ECM with ignition switch turned OFF.
  2. Check that circuit voltage between start signal terminal of ECM connector and vehicle body ground.
    • Ignition switch is at "START" position: 8 - 14 V
    • Ignition switch is at other than "START" position: 0 - 1 V

Is it in good condition? 		 Substitute a known-good ECM and recheck. Repair or replace start signal circuit.
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