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Test Kc: Step 1

1) Codes 44 (94), 45 & 46: Verify Vacuum Line Routing  Code 44 or 94 indicates thermactor system is inoperative. Code 45 indicates thermactor air is flowing upstream when NOT signaled to do so by ECA. Code 46 indicates thermactor air NOT by-passed when directed. Possible causes for these faults are:

Check for correct vacuum hose routing to AM1/AM2 solenoids and by-pass diverter valve. Use vehicle emissions label as a guide. Check for kinked or blocked vacuum hoses. Check for kinked or blocked air hoses. Check for disconnected vacuum hoses. If problems are detected, correct hose routing, repair faults and repeat QUICK TEST. If vacuum routing is okay and Code 44 or 94 is displayed, go to step 4). If Code 46 is displayed, go to step 3). If Code 45 is displayed, go to next step.

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