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INSPECTION PROCEDURE USING AN OSCILLOSCOPE TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-1089 2. Connect the oscilloscope probe to each check harness con- nector terminal to analyze each cylinder: • Terminal No. 153 for the number 1 cylinder. • Terminal No. 146 for the number 2 cylinder. • Terminal No. 140 for the number 3 cylinder. • Terminal No. 139 for the number 4 cylinder. Standard Wave Pattern Wave Pattern Observation Points Point B: Injector drive time Observation conditions Function Special pattern Pattern height Variable Variable knob Adjust while viewing the Pattern selector Display Engine r/min Idle speed CONTRAST WITH PROBABLE CAUSE Injector coil induced voltage is Short in the injector solenoid 127 126 125 124 123 122 121 133 132 131 130 129 128 140 139 138 137 136 135 134 146 145 144 143 142 141 153 152 151 150 149 148 147 AK303940AB OSCILLOSCOPE POWER PLANT ECU AKX01604 (V) 50 0 DRIVE SIGNAL:"ON" POINT B: POINT A DRIVE SIGNAL:"OFF" POWER VOLTAGE INJECTION COIL INDUCED AB Standard wave pattern |