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FUEL PUMP EC-1397 [VK45DE] C D E F G H I J K L M A EC Specification data are reference values and are measured between each terminal and ground. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam- Diagnostic Procedure NBS005Q4 1. CHECK OVERALL FUNCTION 1. Turn ignition switch ON. 2. Pinch fuel feed hose (1) with two fingers. OK or NG OK >> INSPECTION END NG >> GO TO 2. 2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Turn ignition switch ON. 4. Check voltage between ECM terminal 113 and ground with OK or NG OK >> GO TO 5. NG >> GO TO 3. TER- MINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 38 G/B Fuel pump control module [When cranking engine] Approximately 0V [Engine is running] ● Warm-up condition ● Idle speed 4 - 6V 39 B/R Fuel pump control module [When cranking engine] 0 - 0.5V [Engine is running] ● Warm-up condition ● Idle speed 8 - 12V 113 GR Fuel pump relay [Ignition switch: ON] ● For 1 second after turning ignition switch ON [Engine is running] 0 - 1.5V [Ignition switch: ON] ● More than 1 second after turning ignition BATTERY VOLTAGE Fuel pressure pulsation should be felt on the fuel feed PBIB2721E Voltage: Battery voltage PBIB1187E |