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EC-458 < COMPONENT DIAGNOSIS > [VQ35HR] IGNITION SIGNAL IGNITION SIGNAL Description INFOID:0000000003133646 The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns Component Function Check INFOID:0000000003133647 1. INSPECTION START Turn ignition switch OFF, and restart engine. Does the engine start? YES-1 >> With CONSULT-III: GO TO 2. >> Go to 2. CHECK IGNITION SIGNAL FUNCTION With CONSULT-III 1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III. 2. Check that each circuit produces a momentary engine speed drop. Is the inspection result normal? YES >> INSPECTION END NO >> Go to 3. CHECK IGNITION SIGNAL FUNCTION Without CONSULT-III 1. Let engine idle. 2. Read the voltage signal between ECM harness connector terminals under the following conditions with an NOTE: The pulse cycle changes depending on rpm at idle. Is the inspection result normal? YES >> INSPECTION END NO >> Go to Diagnosis Procedure INFOID:0000000003133648 1. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I 1. Turn ignition switch OFF, wait at least 10 seconds and then turn ON. 2. Check the voltage between ECM harness connector terminals under the following conditions. ECM Voltage signal + – Connector Terminal Connector Terminal F101 11 M107 128 12 15 16 19 20 JMBIA0035GB |