Test 4 & Test 4A: System Operational

These tests check engine start-up circuit, fuel injector, closed loop air/fuel mixture function, coolant temperature sensor function, MAT sensor function, detonation sensor closed loop ignition retard/advance function, EGR valve and canister purge solenoid function, idle speed control and A/C control functions.

Fig 1: Test 4: System Operational (1 OF 2)

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Fig 2: Test 4: System Operational (2 of 2)

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Fig 3: Test 4A: System Operational (1 of 9)

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Fig 4: Test 4A: System Operational (2 of 9)

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Fig 5: Test 4A: System Operational (3 of 9)

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Fig 6: Test 4A: System Operational (4 of 9)

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Fig 7: Test 4A: System Operational (5 of 9)

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NOTE: For additional oxygen sensor information, see TITANIA OXYGEN SENSOR TESTING article.

Fig 8: Test 4A: System Operational (6 of 9)

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Fig 9: Test 4A: System Operational (7 of 9)

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Fig 10: Test 4A: System Operational (8 of 9)

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Fig 11: Test 4A: System Operational (9 of 9)

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