2004 ISUZU TF SERIES Workshop Manual

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Page 1441 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–69 The EVRV is shaped to control vacuum applied to the diaphragm chamber of the EGR valve based on duty signal sent from the ECM. The duty ratio is the

Page 1442 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–70 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS GENERAL DESCRIPTION FOR INJECTION PUMP Outline Instead of the previous face cam type, the radial plunger distributor type injection pump utilizes a

Page 1443 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–71 Low Pressure Fuel Circuit The low pressure fuel circuit must supply sufficient fuel to the high pressure fuel circuit. The main components are the f

Page 1444 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–72 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS High Pressure Fuel Circuit In addition high pressure generating device, the high pressure circuit also consists of fuel piping, and devices to set t

Page 1445 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–73 The pump camshaft speed sensor signal is utilized for the following purposes. To determine the momentary angular position of the cam ring. To calcul

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ISUZU TF SERIES 2004 Workshop Manual 6E–74 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS When current from the pump control unit (PSG) flows to the high pressure solenoid valve coil, the magnet anchor (a movable iron core) pushes the val

Page 1447 of 4264

ISUZU TF SERIES 2004 Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–75 When control current flows to the timing control valve (TCV) coil, the valve needle opens and the fuel annular chamber flows through the orifice to

Page 1448 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–76 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS ISUZU Strategy Based Diagnostics Overview As a retail service technician, you are part of the ISUZU service team. The team goal is FIX IT RIGHT THE
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