Test 3 Or Code 12, 13, 14 - Ignition & Rpm Signal

Fig 1: 4A-FE Test 3 or Code 12, 13, 14 Diagram & Flow Chart

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Fig 2: 4A-GE Test 3 or Code 12, 13, 14 Diagram & Flow Chart

NOTE: To check ignition system components, see IGNITION SYSTEMS in I - SYS/COMP TESTS article

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