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TROUBLE DIAGNOSIS EC-1283 [VG33ER] C D E F G H I J K L M A EC NOTE: DATA MONITOR (SPEC) MODE NOTE: ACTIVE TEST MODE HO2S2 HTR (B1) ● Indicates [ON/OFF] condition of heated HO2S2 HTR (B2) SCB/V CON S/V ● The control condition of the SCB valve ● ON: SCB valve is closed. VOLTAGE [V] ● Voltage measured by the voltage probe. FREQUENCY ● Pulse width, frequency or duty cycle ● Only “#” is displayed if item is ● Figures with “#”s are temporary Monitored item [Unit] ECM INPUT SIGNALS MAIN SIG- NALS Description Remarks Monitored item [Unit] ECM signals Main signals Description Remarks MAS A/F SE-B1 [V] × × ● The signal voltage of the mass air flow sensor ● When the engine is running, specifi- B/FUEL SCHDL × ● “Base fuel schedule” indicates the fuel injec- ● When the engine is running, specifi- A/F ALPHA-B1 [%] × ● Indicates the mean value of the air-fuel ratio ● When the engine is running, specifi- ● This data also includes the data for A/F ALPHA-B2 [%] × TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY) FUEL INJEC- ● Engine: Return to the original ● Change the amount of fuel injec- If trouble symptom disappears, see ● Harness and connector ● Fuel injector ● Heated oxygen sensor 1 IGNITION TIM- ● Engine: Return to the original ● Timing light: Set ● Retard the ignition timing using If trouble symptom disappears, see ● Adjust initial ignition timing IACV-AAC/V ● Engine: After warming up, idle ● Change the IACV-AAC valve Engine speed changes according to ● Harness and connector ● IACV-AAC valve |