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DTC Troubleshooting

DIAGNOSTIC INFORMATION AND PROCEDURES REFERENCE CHART

Step Action YES NO
DTC recheck 
  1. Clear DTC. Refer to DTC CLEARANCE .
  2. Turn OFF ignition switch.
  3. Perform DTC confirmation procedure, and check DTC.

Is DTC P0602 still detected? 
Go to Step 2. Check for intermittent trouble. INTERMITTENT AND POOR CONNECTION INSPECTION
ECM reprogramming check 
Was reprogramming of ECM executed? 
Execute reprogramming of ECM correctly once again. Go to Step 3.
ECM power and ground circuit check 
  1. Check ECM power and ground circuit. Refer to ECM Power and Ground Circuit Check .

Is it in good condition? 
Repair or replace defective wire harness. Substitute a known-good ECM and recheck DTC. Refer to DTC CHECK .