Test 2 Or Code 12, 13, 14 - Ignition & Rpm Signal

Fig 1: Test 2 Or Code 12, 13, 14 Diagram & Flow Chart

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NOTE: To check ignition system components, see IGNITION SYSTEM DIAGNOSTIC CODE TESTS under SYSTEM/COMPONENT TESTS article.

NOTE: Code 12 is caused by loss of "NE" or "G" signal to distributor or ECU during cranking. Code 13 is caused by loss of "NE" signal to distributor or ECU when engine RPM exceeds 1000 RPM